How To Apply Fiberglass Gel Coat
What is Gelcoat, simply stated, gelcoat is the outermost structural layer on a fiberglass boat hull, designed to protect the underlying fiberglass layers. As gelcoat ages, it becomes porous which means the more easily it stains, the worse it looks and the harder it is to clean. For best results you will want to remove any of the existing paint on the surface with sand paper followed by a good pressure washing. Note: adding liquid hardener will darken the color slightly! Below 70F, 20 cc per quart.
WikiHow Contributor Remove the paint from fiberglass by sanding it off with sandpaper. The people resulting finish and the nature of the gelcoat will far exceed a painted surface in terms of longevity and repair ability, but you'll see why painting is the less expensive alternative. The surfacing wax will migrate to the surface as the curing cycle takes place and create a barrier to air. Thinning with these materials can lead to an un-curable application that will aligator on the next shoot, destroying all the time and materials for both shoots, (been there, done that, got several T-shirts to prove.). Capt Patrick McCrary m, back to Tips Index site creation and maintenance by: Capt Patrick McCrary 834 Scott., llano, TX 78643.
Gel Coat, Fiberglass, Paint Training
Both require the same amount prep five and fairing, but the application and finishing is quite different. Wear gloves and eye protection. Strain the tinted gelcoat flower through a paper strainer. The application schedule would be as follows:. Spread polishing compound or oxidation remover onto the fiberglass.
Use a foam roller to cover the fiberglass surface in 2 to 3 layers of resin. Coat 1 2 will be tacky after hardening to the point that you canapos. Protect yourself with a longsleeved shirt.
Any heavier play than 25 mils and you'll run the risk of spider cracks in a few years. Why is gelcoat sticky after applying swags to fiberglass? This is necessary for a tack free surface when cured so that you can sand. Let the final application fully cure before sanding.
Within each of these categories, the resin chemistries are further subdivided. Minimum 24 hours, 48 hours would be best. Community Q A Search Add New Question How do I remove paint from fiberglass? You should be able to spray 10 mils per application allowing for shrinkage in the initial cure, this would be 4 applications. The cured thickness you want prior to initial sanding is a minimum 30 mils max 35 mils.
Gelcoat is quite viscous and almost impossible to spray without thinning.
Many marine craft and aircraft are manufactured using composite materials with an outer layer of gelcoat, typically.5 mm.8 mm (0.02 in.03 in) thick.
9, let the gelcoat rest.
Re-Gelcoating your boat
Surface Preparation and Priming - Fiberglass/Gelcoat
A wet surface won't allow you to see fine sanding marks, so dry the surface and inspect it before moving to the next grit. For Imron and similar topcoats a final buffing and polishing may be required after about 1 month. Apply fine rubbing compound over the buffed fiberglass with a sponge or abrasive pad. 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. The cured topcoat thickness of the painted surface will be around 10 mils.