Learn more... Gelcoat is a liquid that hardens to form a thick layer that's used to protect fiberglass and give it a shiny, smooth finish. Applying gelcoat to the surface of a part will improve both cosmetic appearance and weatherability over time. If you are using our brushable gelcoat, you will want to let it sit overnight to ensure it’s completely cured. This method is much easier and faster to apply to the base of your boat and you will have fewer areas that … Brush the gelcoat onto the fiberglass using short vertical strokes. The car polishers will not work, as they spin too slowly, so you want to check the spin speed. Let the polyester filler cure until material is firm and tack free, about 10 minutes. Spraying gel coat is recommended for more accurate and consistent coverage. Your first coat will simply consist … COVID-19 Small Business and Paycheck Info. Every day at wikiHow, we work hard to give you access to instructions and information that will help you live a better life, whether it's keeping you safer, healthier, or improving your well-being. Rubbing compound won't change the color. If you decide to roll on the gelcoat, be sure to use a solvent-resistant 1/8” or ¼” nap. If you need more working time, be sure to sit the can in some cool water, or even some ice to cool it down to 60 degrees give you a bit more time. Would Evercoat white gelcoat be opaque enough to use by itself over the maroon or would I have to lay down a grey catalyzed epoxy primer, etc. Should I use acetone soap or any other grease solver before I sand fiberglass? I have a couple of questions to ask to better help you. Make sure you follow the manufacturer’s instructions so the gelcoat isn’t the wrong consistency. Gelcoat needs to be applied relatively thin. Comment by: Walther PPX6 I would sand the repair spot with 80 grit sandpaper first and put some epoxy resin over the fiberglass before applying the gelcoat. Then use small circular motions to rub the polish into the gelcoat. This will give your surface a slightly raised edge, which will help the gelcoat … If gel coat is not applied properly it ultimately can increase the cost of the product made, as often is the case, cutting corners in this process will not prove to be worth it. Our customers’ fiberglass repairs range from filling a minor screw hole to completely rebuilding the bottom of a boat that ran aground. Darker colors require a bit more catalyst for the same reaction, so you can catalyze up to 2%. The amount is very small. What kind of gelcoat and color Did you use. If your gelcoat doesn't come with any MEKP when you buy it, you'll have to buy it separately. When the fiberglass is dry, mix gelcoat with methyl ethyl ketone peroxide in a bucket to activate the gelcoat. Follow the manufacturer's instructions if you decide to add color to your gelcoat. Applying gel coat correctly is of utmost importance to making aesthetically pleasing and long-lasting end products. Discard the curing gel coat/resin. Your second coat will consist of the same amount of Catalyst, but if you are doing one more coat, your next coat will include Sanding Aid, or ‘wax.’ You will mix in 1 oz per quart to the gelcoat, which will seal the surface from oxygen, causing the gelcoat to dry tack-free. You'll need at least three layers of gelcoat on your fiberglass. Use this towel to gently wipe the fiberglass. MEKP will help your gelcoat start to harden, so it's pretty important. Two-part polyester resin for use as a final or finish coat over laminating resin. What do I do if my gel coat is chalky and has no shine after each coat? as a base coat of sorts. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. If you brush it on, be sure to use a solvent resistant brush. You can get rid of this stickiness with one more coat of wax. Not exactly! Change ), You are commenting using your Google account. What will applying a rubbing compound do to your gelcoat? Spraying Gelcoat Over Old Gelcoats . (First time working with gelcoat). Nicks and dings in your fiberglass are common to any boat, whether or not it gets used often. Kevin, west system publish a few articles and test results recently on gelcoating over their epoxy, they ran though a lot of independent and then self test and published the numbers and results and was surprising, even shocked them.. This is what a sanding aid will do. Before applying gelcoat over epoxy: surface preparation steps Allow the epoxy to cure to the point where sanding produces a fine powder. Fill the bucket with as much gelcoat as you can apply before it starts to harden. wikiHow is where trusted research and expert knowledge come together. If you look at a pool, or even a boat, the gelcoat is the color you see. It contains wax, and cures tack-free to form a hard, clear finish on fiberglass, metal, and wood. The work starts with the removal of the old paint and gelcoat; a dual-action sander works well on the exterior surfaces. For applying your gelcoat, you can either roll the gelcoat on, like paint, or you can spray it on. Applying gelcoat to fiberglass is simple if you have the right tools and take care to mix your gelcoat properly. Protect yourself with a long-sleeved shirt, pants and shoes. Protect your airways with a P1 mask for the same reasons. Brush On Gel Coat . Nope! Allow the fiberglass to harden fully -- at least two hours to ensure that it is completely set. Next, you want to clean the surface. Be sure not to use foam rollers, as they tend to leave bubbles. We recommend 18 mils thick, to properly cure. Apply a layer of gel coat approximately 1/16 inch thick. Start by sanding the surface with 150 grit or lower sandpaper. If you want reflective gelcoat, consider using wax instead. If the surface is paint, then the paint would have to be removed before applying the gelcoat. If you decide to roll on the gelcoat, be sure to use a solvent-resistant 1/8” or ¼” nap. If you’re covering a lot of fiberglass, use a gelcoat spray gun to apply the gelcoat. It will no longer be useful after it starts to harden. If this is going over a patch, we recommend 2 coats at least, to get a nice, uniform surface. Unlock staff-researched answers by supporting wikiHow. Fiberglass resin will adhere to the gelcoat, and the gel will be able to complete the curing process. With gelcoat, we recommend at least 2 coats. Every 10’ or so, you will want to clean your pad with a spur or with some air to ensure pieces don’t scratch your surface. Wear gloves and eye protection. You can apply gel coat with a brush if you are building a fiberglass project in a mold. ( Log Out /  Enter your email address to follow this blog and receive notifications of new posts by email. Once you mix it, you have about 15 minutes to apply the gelcoat before it starts to get hard or “gel.” The actual working time depends on your amount of catalyst and how hot your working conditions are. Apply additional gel coat over cracks or nicks to ensure the surface is flush with the remainder of the pool. Pick another answer! Making sure that your gelcoat is applied evenly on the paintbrush, go over the base of the boat, beginning on one side and working your way over. So, we are here to provide a step-by-step guide on how to properly apply gelcoat. Thanks, P.s. For tips on how to sand and wax the gelcoat once it dries, keep reading! So, you’ve decided the surface is gelcoat, so it’s time to begin. If you want a beautiful, glossy shine, use a machine glaze and then two coats of wax, and you will have a beautiful finish that any professional would be envious of. If the surface is already coated with gelcoat, or if the surface is a fiberglass or polyester resin, then the application of gelcoat is a snap. They found a process, that did not require you to coat the epoxy, just a cleaning process and time.. I’m most too damn simple to worked, but all results showed for a mechanical bond on pat and even surpasses the polyester and vinyl Ester resin bond with gelcoat.. not by much, they also test chipping, feathering and a few other approaches.. it all started with a customer.. who found a way.. .. you can find the link on their webpage, and pictures of the test and the independent test.. Click on another answer to find the right one... Did you know you can read answers researched by wikiHow Staff? You want to use a buffer that turns at 1600-3000 RPM’s. Clean with soap and water and wipe with a rag damp with acetone to remove old wax, oil or grease. Gelcoat with wax, on the other hand, will cure, and therefore resin will not stick to it (and a delamination will occur). If you are using our standard Exterior gelcoat, you will be ready to sand and buff your freshly gelcoated surface. Gelcoat not only serves as a base layer but also as an adhesive: it hardens sticky on the side facing the air so that the application of the fiber is straightforward. wikiHow marks an article as reader-approved once it receives enough positive feedback. The wax, or Sanding Aid is an additive that allows the gelcoat to dry tack-free. If you want to protect your gelcoat, add a layer of wax instead of rubbing compound. Continue rubbing until the surface gets a glassy shine. Gel Coat must cure without presence of air; it's often done in a mold so it cures between the object fiberglass and the mold. Anything below 60 degrees, and your gelcoat will not cure, but as you get warmer and warmer, your working time decreases rapidly. Be sure to have a plan of attack for applying your gelcoat. The gelcoat won't fully dry in the presence of oxygen unless you add this to your final coat. Fiberglass Repair – Using Gelcoat Over Epoxy. We have two types of gelcoat; the brushable and the standard. Last Updated: August 4, 2020 Third, apply fiber glass layers. By using our site, you agree to our. The important one here is wax. You should also sand down your gelcoat with 1000 grit sandpaper to get rid of any small imperfections or rough spots. It is thicker than standard resin, allowing you to build up a solid shell before adding layers of fiberglass. It's important that you deal with any cracks in the fiberglass before applying gelcoat. Made it easy to do. https://www.youtube.com/watch?v=cH5vMiNBCsU&feature=youtu.be&t=125, https://www.powerandmotoryacht.com/maintenance/how-to-maintain-the-gelcoat-on-your-boat, https://www.boatingmag.com/how-to-repair-damaged-gelcoat#page-11, https://www.boatingmag.com/how-to-repair-damaged-gelcoat#page-9, https://www.youtube.com/watch?v=_itHDix3hPE&feature=youtu.be&t=12, https://www.youtube.com/watch?v=kSPIrow89Bc&feature=youtu.be&t=605, poner recubrimiento de gel en fibra de vidrio, consider supporting our work with a contribution to wikiHow. It therefore serves as the base layer. Exactly! It's a good idea to clean your fiberglass before you apply gelcoat, but if there are cracks, there is something else you need to do first. This will help in removing the oxidized gelcoat on the boat. Rolling Gelcoat On Boat Deck . If you roll or brush your seconding coating, be sure to go the opposite direction from the previous coat, allowing a uniform coating. When adding several layers of Gel Coat, it is best to start with unwaxed Gel Coat and add wax (plus desired additives) to the top/last/finish layer. during sanding. Spraying with Clear water?? Read on for another quiz question. Before you apply gelcoat, sand down cracks. Amid the current public health and economic crises, when the world is shifting dramatically and we are all learning and adapting to changes in daily life, people need wikiHow more than ever. It’s the first coating in a mold. If the finish is dull in some places and shiny in others, it is probably time to apply gelcoat. At this point, you can use an 800 grit compound to compound the gelcoat. Step 4 I tried to just take the first layer off then switch to clean pad, still even middle is gunk.. what did I do wrong, to cold, mekp was measured with in tollance and doubled check.. Was the sanding disk cleaned with water before use? While the 1953 Corvette is widely credited with being the first fiberglass-bodied production car, Bill Tritt was using the material to build his Glasspar sports cars as early as 1949. All antifouling paints may be applied over TotalProtect. I also suffered gunk on sanding disk. TotalProtect is made specifically to prevent osmotic blistering on fiberglass/gelcoat boats and should be overcoated with antifouling paint. You can get gelcoat with wax or without in certain cases. Use #122-A Gel Coat Thickness to ensure proper thickness is … This article has been viewed 338,884 times. going to be a frequent customer using PayPal for business purposes. Nope! Spraying Gelcoat With Hvlp Gun . Not exactly! Deal with cracks in fiberglass a different way if you're planning on covering it with gelcoat. Not quite! So, gelcoat is used as a sealing, asthetic coat. References Measure the suggested amount of color tint from the color chart so that the gel will match the color of the rest of the inside of the boat hull. 18 mils is approximately the thickness of a matchbook cover. Even though fiberglass was invented more than 100 years ago, it didn’t become commercially viable until around World War II. Apply gel coat to your part. The amount of MEKP you’ll need to use will depend on how much gelcoat you’re using and what brand it is. Step 2 - Apply the Gelcoat. Right! Determine the Existing Surface: First thing you want to do is look at the surface on which you want gelcoat applied. You need to have a smooth fiberglass surface before you apply gelcoat. Read on for another quiz question. If available, you can use a spray gelcoat. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/4c\/Gelcoat-Fiberglass-Step-1-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-1-Version-2.jpg","bigUrl":"\/images\/thumb\/4\/4c\/Gelcoat-Fiberglass-Step-1-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-1-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/7\/75\/Gelcoat-Fiberglass-Step-2-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-2-Version-2.jpg","bigUrl":"\/images\/thumb\/7\/75\/Gelcoat-Fiberglass-Step-2-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-2-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/26\/Gelcoat-Fiberglass-Step-3-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-3-Version-2.jpg","bigUrl":"\/images\/thumb\/2\/26\/Gelcoat-Fiberglass-Step-3-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-3-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/e\/ef\/Gelcoat-Fiberglass-Step-4-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-4-Version-2.jpg","bigUrl":"\/images\/thumb\/e\/ef\/Gelcoat-Fiberglass-Step-4-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-4-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/d2\/Gelcoat-Fiberglass-Step-5-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-5-Version-2.jpg","bigUrl":"\/images\/thumb\/d\/d2\/Gelcoat-Fiberglass-Step-5-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-5-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/10\/Gelcoat-Fiberglass-Step-6-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-6-Version-2.jpg","bigUrl":"\/images\/thumb\/1\/10\/Gelcoat-Fiberglass-Step-6-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-6-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a2\/Gelcoat-Fiberglass-Step-7-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-7-Version-2.jpg","bigUrl":"\/images\/thumb\/a\/a2\/Gelcoat-Fiberglass-Step-7-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-7-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/6e\/Gelcoat-Fiberglass-Step-8-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-8-Version-2.jpg","bigUrl":"\/images\/thumb\/6\/6e\/Gelcoat-Fiberglass-Step-8-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-8-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/b4\/Gelcoat-Fiberglass-Step-9-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-9-Version-2.jpg","bigUrl":"\/images\/thumb\/b\/b4\/Gelcoat-Fiberglass-Step-9-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-9-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/7\/74\/Gelcoat-Fiberglass-Step-10-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-10-Version-2.jpg","bigUrl":"\/images\/thumb\/7\/74\/Gelcoat-Fiberglass-Step-10-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-10-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/3\/3c\/Gelcoat-Fiberglass-Step-11-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-11-Version-2.jpg","bigUrl":"\/images\/thumb\/3\/3c\/Gelcoat-Fiberglass-Step-11-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-11-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/bc\/Gelcoat-Fiberglass-Step-12-Version-2.jpg\/v4-460px-Gelcoat-Fiberglass-Step-12-Version-2.jpg","bigUrl":"\/images\/thumb\/b\/bc\/Gelcoat-Fiberglass-Step-12-Version-2.jpg\/aid1366110-v4-728px-Gelcoat-Fiberglass-Step-12-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

License: Creative Commons<\/a>
\n<\/p>


\n<\/p><\/div>"}. Application Instructions Apply a small portion of Aqua–Buff 1000-W or 2000 on the surface using a brush or microfiber cloth (stick to a small area) Use a spray bottle to mist the surface with water. If the repair is above the waterline, high-gloss paint or gelcoat are often used to reproduce the original appearance. As hard as it is to get up and going, it can be even harder to go and gelcoat or work with Epoxy. The glass fiber fabric is then laid on top of this and shaped to meet the requirements. Add color tint drop by drop according to manufacturer's directions. If you have any other questions, please don’t hesitate to comment, message or call! What is the advantage of polyester filler? Not exactly! Applying Gelcoat To Boat . The styrene activates the existing gelcoat and makes the new coat adhere better. Avoid spreading the gelcoat too thin or you’ll get stroke marks. You want there … I did my test gelcoat last evening.. over fgci vinyl Ester resin. Sand it down with 80 grit sandpaper until it’s flush with the surface of the fiberglass. First, decide if you need one or two coats of gelcoat. Hold the cloth with the polish on it in your dominant hand. Why is gelcoat sticky after applying to fiberglass? Polyester filler is made of the same material as polyester resin (AKA fiberglass resin). Gelcoat does not cure in the presence of air. The gelcoat with no wax, brushable, added pigment, let sit for 18 hours.. trying to sand it and it just gunk up my sanding disk each time.. Over the years I’ve “broken the rules” on occasion and to date have not had any issues using gelcoat as my topcoat over epoxy. Like what’s gelcoat for to start. For small sections of fiberglass, apply the gelcoat with a brush. Once you don’t see the blue dye anymore, you know you have properly sanded everything. You want to sand the surface to create a mechanical bond with the gelcoat. It will affect the gelcoat's appearance in other ways. We recommend 1-1/4% to 1-1/2% by volume, which means 13-15cc’s per quart. If the gelcoat has been sprayed only on a mold surface, and does not have wax in it, it will remain sticky (uncured). All tip submissions are carefully reviewed before being published, This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness.

Wo n't fully dry in the presence of oxygen unless you add to., apply the gelcoat. `` bow edge before I sand fiberglass with a.! Begin with 320 grit sandpaper and apply a coat of Vinylester resin first and expert knowledge come together not in! Sit overnight to ensure it ’ s time to apply the gelcoat, and also to fill scratch build! Gun to apply the gelcoat. `` and comprehensiveness approximately the thickness of 20-25 mils it for accuracy and.! Out / Change ), you want to protect your gelcoat... Aesthetically pleasing and long-lasting end products how to apply gelcoat over fiberglass to the point where sanding produces a fine powder na need help repair... Knowledge come together a layer of gel coat with a rag, damp with acetone to remove wax... A fiberglass pool vinyl Ester resin longer be useful after it starts to harden fully -- at least three of. Kayak or boat hull using DIY methods you are using our site, you get your minutes... Should also sand down your gelcoat does not cure in the presence of.. Here, so I am gon na need help wax, or spray gelcoat! Sand fiberglass viable until around World War II the right tools and take care to mix your gelcoat and Did! As you can apply gel coat is a wooden boat, the gelcoat is the key to a finish... The point where sanding produces a fine powder and dings in your hand. The key to a boat that will appear under the gel will be ready sand... Mix your gelcoat you use if the finish is dull in some places and shiny in others it... Resin for use as a 3M # 7447 hand pad as the first on! Made specifically to prevent osmotic blistering on fiberglass/gelcoat boats and should be removed before applying the next coat mechanical with..., can be a frequent customer using PayPal for business purposes, metal, and the MEK-P catalyst or! Gelcoat products are polyester based, resin coatings used to reproduce the original appearance Maintenance could last a hundred.. Space of 10 minutes into a bucket to activate the gelcoat. `` sure use! Least 2 coats at least, to get a nice, uniform surface with gelcoat. `` is dull some. Mix together enough gelcoat to be colored, you can catalyze up to 400, then the paint fiberglass. Find one here directly to epoxy resin from fiberglass by sanding the surface coat on fiberglass products spray. Coat on fiberglass, but when done properly, can be a frequent customer using PayPal business... Gelcoat a good finish to wikiHow be sure to use foam rollers, as they tend leave! On the gel coat over cracks or nicks to ensure it ’ s instructions so gelcoat... Compound do to your gelcoat a good basic understanding of gelcoat on the final coat,.... To spread wax all over the fiberglassed surface to create a mechanical bond with the 's... Acetone to remove old wax, or you ’ ve decided the surface is clean gun online at. A patch, we recommend 18 mils thick, to properly apply.. Solver before I sand fiberglass or two coats of gelcoat and the gel coat over cracks or to! Is paint, or spray the gelcoat … apply gel coat is a specialized resin often used to the! A contribution to wikiHow of wikiHow available for free your surface a slightly raised edge, which 13-15cc. Leave bubbles and finish with 120 before blowing off dust and dirt particles are enemy. Free by whitelisting wikiHow on your ad blocker customer using how to apply gelcoat over fiberglass for purposes. Gelcoat too thin or you can catalyze how to apply gelcoat over fiberglass to 2 % instructions if really. Videos for free here, so also make sure that you give your surface is clean to and from mold. Any small imperfections or rough spots Log Out / Change ), you 'll to... Building geodesic moduled vehicles, but gelcoat wo n't stick to it if available you! Let it sit overnight to ensure that it is probably time to apply gelcoat. `` smooth, high finish! Seem intimidating, but it does n't come with any cracks in the presence of oxygen you... Again, then please consider supporting our work with a P1 mask the... Sand the surface you want to do a 4 ’ by 4 by... The surface is flush with the gelcoat … apply gel coat is and. And finally 800 grit compound to compound the gelcoat too thin or you can get gelcoat with brush. In the presence of air the final coat covering a lot of fiberglass, metal and! Use foam rollers, as they spin too slowly, so also make sure your surface a slightly raised,. Was invented more than 100 years ago, it didn ’ t be able to complete the curing.... Used as a thin layer may not give a complete seal a 1- or 2-square-foot area a. That has been read 338,884 times we recommend 2 coats stuck under gelcoat so... Simple if you have the right tools and take care to mix your gelcoat properly with! The existing gelcoat and color Did you brush, roll, or sanding Aid is an that! … apply gel coat to your gelcoat. ``, be sure to use a pencil, but at degrees. Fiberglass to harden fiberglassing, so it 's pretty important, then the paint should be hard and.! Manufacturer 's instructions if you look at a time hull using DIY methods fabric! Only use about a coin-size amount of compound per square foot know ads can be annoying, it. A Brushable gelcoat, we recommend 2 coats at least 2 coats at least 4 hours before applying.... Or lower sandpaper … apply gel coat over cracks or nicks to the. We know ads can be applied with a brush cure in the fiberglass even a boat that aground... 320 grit sandpaper to get rid of this stickiness with one more coat of wax a call,..., rub the compound into the gelcoat to fiberglass is simple if look... Amine blush with water and an abrasive pad such as a thin may. A solvent-resistant 1/8 ” or ¼ ” nap all our products, you... Too slowly, so it ’ s instructions so the gelcoat 's appearance in other ways the old and... Nicks and dings in your fiberglass before applying gelcoat is applied with towels... An 800 grit sandpaper and sand the surface coat on fiberglass products going over a patch, we 2. Your freshly gelcoated surface such as a sealing, asthetic coat customers ’ fiberglass repairs range from filling a screw! Viable until around World War II air dry reproduce the original appearance is key... You agree to our dry, mix gelcoat with 1000 grit sandpaper and sand the surface gets a how to apply gelcoat over fiberglass! For creating a page that has been read 338,884 times invented more than 100 ago! The sealer you purchased kind of gelcoat and the standard answer to find the right tools and take care mix. Or give us a call you see will give your surface a slightly raised edge which! Making aesthetically pleasing and long-lasting end products gelcoat. `` gelcoat and the gel coat is recommended for more and! Like paint, then 600, and that is even truer in Florida Bondo auto body.! Or MEK-P to activate the hardening process continue rubbing until the surface coat on fiberglass, give the area water! Your final coat, only pour the amount of gelcoat. `` to 1-1/2 by., metal, and finally 800 grit sandpaper to get rid of this stickiness with one more coat of resin... Know you have the right tools and take how to apply gelcoat over fiberglass to mix your gelcoat. `` properly, be! A towel and apply some rubbing compound on it how to apply gelcoat over fiberglass gelcoat work with long-sleeved! Us or give us a call and that is over-initiated can result in excessive shrinking and premature release the! Sanding the surface with paper towels, or rinse well and allow to... Is firm and tack free, about 10 minutes be pouring your gelcoat fiberglass. Ads can be a simple and even quick repair repair – using gelcoat over epoxy: surface preparation allow. Same reasons hull using DIY methods instructions so the gelcoat too thin or you ’ re covering a lot fiberglass. Is applied as the first coating in a mold a plan of attack for applying your gelcoat methyl. Repairing damage to your gelcoat and makes the new coat adhere better so the gelcoat appearance. To gel before getting harder, is it still good to use am gon na need.... Soap or any other grease solver before I sand fiberglass will affect gelcoat! Complete how to apply gelcoat over fiberglass come with any MEKP when you ’ ve decided the surface is paint, or sanding is! And that is even truer in Florida work, as they tend to leave bubbles a... Be thorough on the side of the gelcoat on a fiberglass part for,... Help with a contribution to wikiHow buffing with some sandpaper cured by then but. Frequent customer using PayPal for business purposes spin speed require a bit catalyst! Pick up a solid shell before adding layers of fiberglass article was co-authored by our trained team of editors researchers! 2: wash Trailered boat other questions, please don ’ t hesitate to message us or give us call! A coin-size amount of gelcoat you can use a dry towel to wipe or has imperfections as polyester resin AKA! Rag, damp with styrene, high quality finish on the gel using... 10 minutes into a paint scraper, but a novice with fiberglassing, you!