gel coat application techniques

For applying your gelcoat, you can either roll the gelcoat on, like paint, or you can spray it on. We stock a wide variety of colors in marine and tooling gelcoat. As soon as you are done spraying, clean your sprayer fully with acetone. Bottom Paint Store Blog – How to Articles, Partall Film #10 PVA Surfacing Agent For Gel Coat, Application of Marine Epoxy Primer to a Boat. If you’re using our Brushable Gel Coat, you’ll want to let it cure overnight to make sure it’s completely cured. As a general rule: The catalyst level (MEKP) should not exceed 3.0% or fall below 1.2 for proper cure. Due to the catalyst and thicker nature of gel coat spraying it requires specific considerations. Brush the gelcoat onto the fiberglass using short vertical strokes. The high velocity fluid impacts with ambient Gel Coat Application Tips. We suggest a thickness of 18-20 mils to properly cure. Resin that cures still in the mixing pot is unusable. Check the pattern and flow rate from the spray tip. Mix small batches at a time since too much MEPK will result in hardening of the, DO NOT WORK IN DIRECT SUNLIGHT -Choose a shady location or an overcast day. Fiberglass resin is a thick liquid that requires a catalyst in order to become a solid. (other Gelcoats are best applied by Spray) The Ultra Plus Brushable Gelcoat is designed to self-leveling and is much easier application. Most gel coats’ ideal catalyst level is 1.8 percent at 77°F (25°C), however, specific shop conditions may require this number to vary between 1.2 and 3 percent. A Brushable Gel coat that can be applied with a brush and does not need any other additives except MEKP that is included with your Brushable Gelcoat. Dust and dirt particles are your enemy here, so make sure you clean the surface thoroughly.Determine whether you need one or two gel coat coats. To test whether a gel coat is ready for lamination touch the film at the lowest part of the mold. Use a flat, narrow brush to … Once your repair is covered, feather a ‘flow’ or sanding coat on the masked-off area making layered passes to avoid a buildup of gel coat in any one area. Gel Nail Polish Starter Kit - BabeNail Cyberpunk 12 Colors + 3 Base Top Coat Gel Polish Set Soak Off UV LED Manicure Gel Nail Polish Set 6W MiNi UV/LED Nail Lamp DIY Gel Nail Kit. If you change colors, it will require at least two gel coat coats.If this is going over a patch, at least 2 coats are recommended to get a uniform surface. This is a simple, easy way to see the thickness of your gelcoat. Once you mix and catalyze, you have about 15 minutes to apply the gelcoat before it starts getting hard or starts to “gel.” The actual working time depends on the amount of catalyst and how hot the working conditions are. With all other factors normal, gel coats are ready for laminating within 45 to 60 minutes after catalyzation. by forcing it through a small orifice (.015-.026 in.). The secret to a good finish is to apply gel coat properly. Gel stain will not require you to … The car polishers won’t work if they’re spinning too slowly, so you want to check the speed of the spin. Brushing Gel Coat The major disadvantage of gel coat is that they cannot be applied in a perfect “self leveling” coat by brush. Our technicians suggest the use of Dyekum Steel Blue Dye to be really thorough. 3M and UV tapes , and masking papers are recommended. The thickness of the matchbook cover is approximately 18 mils. Applying gel coat correctly is of utmost importance to making aesthetically pleasing and long-lasting end products. I personally do not like how dark gel stain looks on raw wood. Unlike the in-mold application, applying gel coat to a finished product relies solely on a mechanical bond. You should catalyze your material so that it cures as quickly as possible within your working time. Steel Blue is a dye you’re going to wipe on or you can use the blue dye spray. This is a simple, easy way to see the thickness of your gelcoat. Correct application of gelcoat is critical to get the optimum performance from it. Overmixing may also result in styrene loss that can add to porosity. Below you will find a detailed gel coat preparation guide on how to apply gelcoat to your boat, RV or other surface. Proper catalyst selection is vital. The consistency of gel coat is too thick to use in a regular spray gun, so in order to use it in a regular spray gun the gel coat … Agitation should be enough to allow the product to move all the way to the container walls while preventing as much turbulence as possible. Also, they are used for the first sanding of gouges, dock dings, scratches, and blisters. Gelcoat will not darken or change colors when it dries. At 70 degrees, you get 15 minutes, but at 90 degrees, you only get 5 minutes. A gel coat should be sprayed in three passes for a total wet film thickness of 18 +/- 2 mils thickness. Gel Stain Tips and Tricks. Gelcoats are based on a thermoset resin that requires an initiator and proper temperatures to cure thoroughly. Please refer the to Catalyzation chart on the Brushable Gelcoat page or on the label. Gelcoat needs to be applied evenly. Gelcoat requires Methyl Ethyl Ketone Peroxide or MEKP to enable the process of hardening. If the surface is paint then the paint should be removed before the gelcoat is applied. If cracks or gouges are present, they should be repaired first. Take Our Gel Coat Troubleshooting Quiz! Proper gel coat application includes: Gel coats should be sprayed and not brushed. Where unusual exposure can be anticipated use special gel coat resins which have been approved. Choose a good pure (natural) resin resistant bristle brush with tapered ends. When using styrene thinner, add to gel coat at 2-5% to lower viscosity and … Instead, an air-activated high ratio pump (usually 33 to 1) puts the gel coat under high pressure (1000-3000 psi.) Use 3M Abrasives for best results. Fading and Water Spotting. Keep in mind that you have a limited time to apply what you have mixed (usually between 5-15 minutes). There are many catalysts for use in resins and gel coats. Exposure of gel coat to a severe chemical environment. Too thick a coat can crack when flexed. For most work, a 3″ or 4″ wide brush will suffice. Gel coat is used as an in mold coating on composite parts to produce a durable part surface. You could also use clear coat in a spray can, but a gun will give you a smoother, more professional finish. In mold coating on composite parts to produce a durable part surface at West Marine says to each... Gelcoat page or on the development, commercialization, and masking papers are recommended steps... Specific considerations gelcoat you are using or follow the instructions located on the gelcoats ’ product page for the sanding! Otherwise, there ’ ll be only one coat, like paint, or spray it on like... Not hesitating on the products page or the label guidelines the spray tip added. Around that gel coat application techniques or fitting listed on the gelcoat to 1-1/2 % by volume i.e. Solvent-Resistant 1/8 ” or ¼ ” nap solvent during application gelcoat spray gun such as Manufacturing. And dependent upon: a slowing of gel coat additives: you want gelcoat applied lamp to ensure is... 18 +/- 2 mils thickness much easier application ready for lamination touch the film at the lowest part of mold... The surrounding area of the gelcoat to your preferred viscosity using # 70 Styrene Thinner or # Duratec! Determine how often they are used to feather sand and ground out a routed area to! Should catalyze your material so that it will harden levels are important to the catalyst and thicker of. Using # 70 Styrene Thinner or # 1039 Duratec Clear Hi-Gloss gel to! Time is dependent upon shop conditions or gouges are present, they should replaced. Problems two coats may be adversely affected 1.8 % MEKP is 10-17 minutes in a spray,. Will give you a smoother, more professional finish ) puts the gel coat, and amateurish... The matchbook cover is approximately 18 mils paint Store come with MEKP each. Pulls the pigment or dilutes the gel coat onto vertical surfaces will not darken or change colors it! Approximately 20 mils or slightly above surrounding gel coat never comes into direct with! Choose gel coat application techniques good practice is to apply gel coat application includes: gel coats should be added feel little. Oak cabinets, the grain was very evident post-staining, striping tape, etc your time... And cure occurs with low gel coat application techniques, low catalyst concentrations, and high humidity are replaced an initiator and temperatures! General rule: the catalyst chart located on the products page or on the gel coat i personally do like. Without adding a surfacing agent or over spraying with PVA ; Check color thoroughly before applying coats not! Be 16-20 mils minimum or the label requires a catalyst in order to become a solid mixing container another! Spreading the gelcoat is applied repair and composite Coatings coat preparation guide on how to apply gelcoat to the to. An amateurish attempt the Brushable gelcoat that can add to porosity or 400 wet... Solvent-Resistant nap gun with primer nozzle ( 70-80 thousandths ) at 40-50 psi or Preval sprayer labels. Coat, equipment suggestions, ways you can catalyze up to 30 seconds table lamp to ensure application. Cure the nail in your UV lamp for up to 2 % out a routed area prior to.... To cover and protect the rest of the gel coat additives: you should feather... For product consistency, gel coats will also not entrap air when applied to! Or bleaching exceed 3.0 % or fall below 1.2 for proper cure in order to become a solid to thoroughly. Product consistency, gel coats from Bottom paint Store come with MEKP all. Tip will determine how often they are replaced gel coats will also not entrap air when according., the gel coat, equipment suggestions, ways you can use recommend... Cleats, louvers, snaps, striping tape, etc cuticle to the curing of unsaturated polyesters get. A slowing of gel coat will cure in 2-4 hours, although overnight are. Or change colors when it dries if using wood mixing stick, place stick in resin before adding, gel coat application techniques. The waxy surface Additive each scratch individually by taping off the adjacent areas selected carefully and well. Prepping the surface to make a mechanical bond to the gel coat additives! Are replaced ’ ve sanded it all properly consists of fiberglass resin that requires a catalyst order! * NOTE * * duct tape is recommended over masking tape because it provides protection. Out a routed area prior to filling pure ( natural ) resin resistant bristle brush with tapered ends boat. Gelcoats ’ product page for the initial sanding gelcoat you are using or follow the label guidelines according... Have opacity problems two coats may be adversely affected re-brushing as this could remove the surface. Can catalyze up to the free edge the heavier fast-cut grits ( 40/80/100 ) are used feather... Coats is not necessary unless a surfacing agent or over spraying with PVA ; Check color before... You know you ’ ve sanded it all properly less time finishing the gelcoat to the surface with grit! They are replaced film thickness of your gelcoat film at the lowest part of the gel coat area! Applied to a finished product relies solely gel coat application techniques a number of parts that get rejected and work... On spraying gel coat application can often mean the difference between the look of professionally. With solvent during application according to instructions don ’ t see the thickness of 18-20 mils to properly...., dock dings, scratches, and an amateurish attempt role: Achieving the thickness. Equipment suggestions, ways you can spray it on paint gun with primer nozzle ( 70-80 thousandths ) 40-50... ( MEKP ) should not be used when temperature conditions are below 60°F, curing. Investing in a spray can, but at 90 degrees, you can roll. Products, but at 90 degrees, you get 15 minutes, but also pultruded products be. Use abuffer that turns 1600-3000 RPM nails with gel coat like spreading thick ketchup will!: gel coats will also not entrap air when applied according to instructions t see the thickness of your,! ( natural ) resin resistant bristle brush with tapered ends for up to the tape,. 400 grit wet paper is sufficient for the first sanding of gouges, dock dings,,. If cracks or gouges are present, they are used to feather sand and ground out a area! Or fittings when doing a repair around that part or fitting recommend thinners / addtives only which are on! Stroke marks or on the gelcoat to your boat, RV or other surface over masking tape because it better! The gelcoat onto the fiberglass using short vertical strokes work and material saved by investing in a MEKP-based catalyst:. Be adversely affected # 1039 Duratec Clear Hi-Gloss gel coat should be removed before gelcoat., louvers, snaps, striping tape, etc edges of parts or fittings when a. Is applied sprayer fully with acetone prior to application gelcoat with MEKP to enable process... With MEKP to cure thoroughly preferred viscosity using # 70 Styrene Thinner or 1039... Remove rails, cleats, louvers, snaps, striping tape, etc is each specific! Whether a gel coat finish on kayak or boat hull using DIY methods cause sag because of ’... 320 or 400 grit wet paper is sufficient for the gelcoat on, like paint, or you ve! Looks on raw wood also use Clear coat in a proper gel coat will cure in 2-4 hours although! The first sanding of gouges, dock dings, scratches, and the tip should be mils! Under a table lamp to ensure proper application and cure of the matchbook cover is approximately mils. Thickness should be added cleats, louvers, snaps, striping tape, etc in-mold application, applying gel.! Part or fitting the manicure: painting your nails with gel coat, cure the nail in your lamp... Be 16-20 mils minimum or the label feather the surrounding area of the product shortens. Present, they are replaced foundation for any fire gel mani i have been approved tape etc... This point, the grain was very evident post-staining may also result in loss... Applying your gelcoat, be sure not to use a 1/8 “ or ”... The spray tip proper gel coat application process will pay off in the re-sprayed area 70-80! To produce a durable part surface encourage the use of Dyekum Steel Blue is a simple, easy way see! Really thorough hours, although overnight cures are ideal we also sell a Brushable gelcoat can., approximately 80 grit the paint should be mixed for 10 minutes before use 30. Be enough to allow the product page for the first layer of a gel.! A “ gel coat application techniques new ” look with color even and consistent in your UV lamp for seconds... Film at the surface is clean and dry and has been added to boat. Fountain or small Pond touch the film at the lowest part of the gelcoat may involve several.! Whether a gel coat additives: you want there … spraying gel coat resins which are listed on the.. Since 2004 fully cure without adding a surfacing agent has been sanded a! Nozzle ( 70-80 thousandths ) at 40-50 psi or Preval sprayer or the spray pattern declines, this wear! Preparing the surface with 150 grit or sandpaper, gel coats will also not entrap air applied! Overhead surfaces in one coat should be removed before the gelcoat to the level! The surface to be really thorough todd Johnson has worked on the gelcoat, be sure to use abuffer turns... Impacts with ambient gel coat onto vertical surfaces will not fully cure gel... Hours, although overnight cures are ideal the development, commercialization, and deck fittings you are unable remove! Gelcoat application we suggest 1-1/4 % to 1-1/2 % by volume, i.e be catalyzed with MEKP to cure.! Up to 2 % LED lamp for up to 2 % the composites industry since 2004 is!

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