It’s used on the final coat, only. "Helped me learn and getting an understanding on working with gel coats and what I need to consider to get my, "It was great to see the pictures with the instructions. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Good day! How to successfully apply a gelcoat finish over WEST SYSTEM Epoxy. 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. Our standard gelcoats are designed to cure in films as thin as 12mils (0.012 inches); however, we recommend that you apply them in coats of 18-20 mils to get the best cure, hide, and print block. If you’re covering a lot of fiberglass, use a gelcoat spray gun to apply the gelcoat. If you are using our brushable gelcoat, you will want to let it sit overnight to ensure it’s completely cured. Posted on November 11, 2015 by Kristin. The wax, or Sanding Aid is an additive that allows the gelcoat to dry tack-free. Then use small circular motions to rub the polish into the gelcoat. Pick another answer! You can wait 24 hours or continue building your project immediately, the gel coat will not cure until it is sealed in the mold by your fiberglass layers. Dirt or dust will get stuck under gelcoat, so also make sure your surface is clean. At this point, you can use an 800 grit compound to compound the gelcoat. Change ), You are commenting using your Google account. Please consider making a contribution to wikiHow today. Spraying with Clear water?? What kind of gelcoat and color Did you use. unlocking this staff-researched answer. Try again... Not quite! We recommend 18 mils thick, to properly cure. Once you don’t see the blue dye anymore, you know you have properly sanded everything. 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. The sanded fiberglass particles cause irritation when in contact with the skin. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. We recommend using Acetone, as it doesn’t leave a residue and evaporates quickly. Should I use acetone soap or any other grease solver before I sand fiberglass? Not exactly! If available, you can use a spray gelcoat. 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. Wash away amine blush with water and an abrasive pad such as a 3M #7447 Hand Pad. Otherwise, one coat will do. going to be a frequent customer using PayPal for business purposes. 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.. Dry the surface with paper towels, or rinse well and allow it to air dry. If the surface is paint, then the paint would have to be removed before applying the gelcoat. Steel Blue is a dye you wipe on. Try again! Oils, grease and road grime from trailer rides accumulate on the hull, where they quickly break down the protective boat wax, and strain and pit the gelcoat. First you would apply a release agent to the mold, then brush on the gel coat. 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. If you’re cleaning a large fiberglass surface, like the hull of a boat, use a power washer to make the process easier and faster, be very careful, as a power washer can actually cut fiberglass and blow chunks right off surface. ", "Gave me a good basic understanding of gelcoat.". Read on for another quiz question. Refer to the catalyst chart on the side of the can, or you can find one HERE. 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. Gelcoat with wax, on the other hand, will cure, and therefore resin will not stick to it (and a delamination will occur). Read on for another quiz question. We have two types of gelcoat; the brushable and the standard. Apply additional gel coat over cracks or nicks to ensure the surface is flush with the remainder of the pool. 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.. Dust and dirt particles are your enemy here, so be thorough on the cleaning. Made it easy to do. ( Log Out /  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. This will remove any old gelcoat that is adhering to the fiberglass, and it will also wash away specks and stains from the surrounding surfaces. Click on another answer to find the right one... Did you know you can read answers researched by wikiHow Staff? If you have any questions on gelcoat, please don’t hesitate to message us or give us a call! This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. Nicks and dings in your fiberglass are common to any boat, whether or not it gets used often. 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. If you want to protect your gelcoat, add a layer of wax instead of rubbing compound. If the gelcoat has been sprayed only on a mold surface, and does not have wax in it, it will remain sticky (uncured). Repairing damage to your gelcoat and fiberglass can seem intimidating, but when done properly, can be a simple and even quick repair. How should you fix cracks in your fiberglass before applying gelcoat? You'll need at least three layers of gelcoat on your fiberglass. When you’re finished, you shouldn’t be able to see any of the fiberglass underneath the gelcoat. Discard the curing gel coat/resin. Step 4 Pour the amount of gelcoat you can work with in the space of 10 minutes into a paint tray. The amount of MEKP you’ll need to use will depend on how much gelcoat you’re using and what brand it is. Make sure you follow the manufacturer’s instructions so the gelcoat isn’t the wrong consistency. Your first coat will simply consist of the gelcoat and the MEK-P catalyst. It therefore serves as the base layer. Can You Roll Gel Coat . This will give your surface a slightly raised edge, which will help the gelcoat … In most cases, a final finish needs to be applied over the repair. Wear gloves and eye protection. You need to have a smooth fiberglass surface before you apply gelcoat. For tips on how to sand and wax the gelcoat once it dries, keep reading! Spraying Gelcoat With Hvlp Gun . Add color tint drop by drop according to manufacturer's directions. When the fiberglass is dry, mix gelcoat with methyl ethyl ketone peroxide in a bucket to activate the gelcoat. If you decide to roll on the gelcoat, be sure to use a solvent-resistant 1/8” or ¼” nap. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. I want to shoot white gelcoat over a small area of maroon on my glastron, to redefine a few areas to my liking (long story). Thanks, P.s. If the finish is dull in some places and shiny in others, it is probably time to apply gelcoat. So, we are here to provide a step-by-step guide on how to properly apply gelcoat. Yep! If the repair is above the waterline, high-gloss paint or gelcoat are often used to reproduce the original appearance. wikiHow's Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards. Take a towel and apply some rubbing compound on it. (First time working with gelcoat). This article has been viewed 338,884 times. Nope! What do I do if my gel coat is chalky and has no shine after each coat? Not exactly! Rolling Gelcoat On Boat Deck . You can buy a gelcoat spray gun online or at your local paint store. Can gel coat be applied over epoxy resin??? Enter your email address to follow this blog and receive notifications of new posts by email. as a base coat of sorts. I out mekp at just between 1.75% and 2%, out side in temp was 67 Dec, but part was in Sun a few deg warmer. We are ready to gelcoat! If your gelcoat doesn't come with any MEKP when you buy it, you'll have to buy it separately. If you want your gelcoat to be colored, you'll have to add color separately. It contains wax, and that is even truer in Florida pouring your gelcoat and the gel coat to gelcoat... Your local paint store covering it with gelcoat, so it ’.. Anymore, you will want to apply gelcoat directly to epoxy resin??? how to apply gelcoat over fiberglass... And cures tack-free to form a hard, clear finish on kayak or boat hull using DIY methods ’., about 10 minutes before sanding again thanks to all authors for creating a page has! To your gelcoat start to harden fully -- at least three layers of fiberglass compound do your... 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