Ideally the layer should be between 0.25-0.5mm (600-800gsm of material) thick. Your first coat will simply consist of the gelcoat and the MEK-P catalyst. Gel coats are presenting a serious stumbling block to this change. If you brush it on, be sure to use a solvent resistant brush. during sanding. The change is coming about mainly in the production of racing yachts, and in particular, one design series boats. So, you’ve decided the surface is gelcoat, so it’s time to begin. Print through, where the reinforcement material is visible from the surface of a composite, must be avoided. Whether a composite needs to be attractive or functional, getting the right surface finish is vital to a component’s suitability for an application. 18 mils is approximately the thickness of a matchbook cover. If you have any questions on gelcoat, please don’t hesitate to message us or give us a call! The highest-quality, ISO NPG marine finish Gelcoat used to permanently repair and construct originalmarine Gelcoat finishes. Stage 2: PROTECT … The chemicals in wax can have a strong odor and getting any in your eyes can cause serious... 2. A marine repair paste will become dry very quickly, sometimes in a few minutes, so you will have to move towards the wetter areas, taking care not to mark the surface with brush strokes. Apply the first coat. RTM is often used to make parts requiring a high quality smooth finish such as automotive panels, and in this case it is important to choose a surface products that will not wrinkle during moulding and will give and even distribution or resin across the surface. Applications are diverse, and range from anti-corrosion tanks and pipes to ultraviolet (UV) resistant facade panels or pultruded profiles and sports equipments such as skis and snow boards. -Kevin FGCI Customer Service Refer to the catalyst chart on the side of the can, or you can find one HERE. 3M™ Perfect-It™ Gelcoat Heavy Cutting Compound. These guides will help you with faults, how to apply products, grades of fibreglass and much more. Restorative services when you need it. Gelcoat is the coating sprayed up against a highly polished mold at the beginning of the fiberglass layup process. Two coats are usually standard. The product cures to a hard finish and does not require Evercoat Mold Release (#105685) to attain a fully-cured surface. Resin and gel-coat manufacturers are constantly trying to keep up with these demands, and several have brought out low emission products that promise to reduce emission levels without compromising on surface quality. When used together with a pigmented resin, it’s veil can be used to achieve a Class A finish. You can get gelcoat with wax or without in certain cases. From then on, start going up to 400, then 600, and finally 800 grit sandpaper. 140981. In the cruising boat market, construction materials are taking a similar change of direction. The gel coat has to be left to thicken before processing can continue this stage is not always necessary using veils, which means the moulding process does not take as long to complete. Next, thoroughly clean the surface with a solvent like acetone. Combine gelcoat and methyl ethyl ketone peroxide in a bucket. 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. Usually RTM moulders pre-treat their moulds with a low shrink gel coat in order to ensure a high level of smoothness, hardness and colour. Step 1: Identify the Boat Finish Gelcoat cannot bond to a painted surface, so it is vital to identify the boat finish before beginning repairs. Applying gelcoat over an existing (fiberglass) gelcoat finish is a relatively straightforward process. The product cures to a hard finish and does not require Evercoat Mold Release (#105685) to attain a fully-cured surface. Polyester fabric or lightweight glass tissue veils can be used with most thermoset composite manufacturing processes to form a resin rich surface. Too thin and the surface will wrinkle, too much and it will sag. We recommend 1-1/4% to 1-1/2% by volume, which means 13-15cc’s per quart. Application: Brush, roll or spray gun. And as legislation plays a bigger part in shaping manufacturing processes, those producing surfacing products will have their work cut out to keep up. The exterior of most RVs is made with fiberglass and coated with a gel coat finish.

finishing gel coat

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