Pva spray for gelcoat. But the results are worth the trouble.
Pva spray for gelcoat May 16, 2006 · Spraying PVA over Gelcoat? Discussion in ' Fiberglass and Composite Boat Building ' started by searaytuna, May 16, 2006. Gelcoat available with and without wax for boat building and repairs. Sand and Buff the Repair: (The Gel coat may still be a little tacky. Available in green or clear (water-white). Now improved for easier lay out, Partall Film #10 allows application by brush, roller, sponge or cloth as well as excellent spray characteristics. The quick answer is that if you want a smooth shiny final surface by the time you do your wet sanding and buffing there won't be any wax left on the surface to worry about. Partall® Film #10 is a polyvinyl alcohol (PVA) water/alcohol solution of water-soluble, film-forming materials. Sep 2, 2014 · 3. When the gelcoat is catalyzed with MEKP, the wax rises to the surface throughout the cure, keeps the air from contacting the gelcoat, and allows the gelcoat to fully cure. Next you would spray gelcoat or duratec onto the mold surface. Preval spray system. Dec 27, 2022 · This module will show the recommended repair procedures for a chip, scratch/crack, small and large repairs, and application procedures showing the use of One Step Gel-Kote and Laminating Gel-Kote with PVA Mold Release applied for proper cure. While these products can be applied with a brush or roller, we recommend they be sprayed on for several reasons: Superior quality finish—Spray Guns leave behind a smooth, uniform surface area or repair, free of the inconsistencies and brush strokes common with other methods of application Jul 25, 2025 · While gel coat can be applied by brush or roller, we strongly recommend the use of spray equipment. PVA is a world class innovator of high quality, repeatable dispensing and conformal coating systems. Polyvinyl Alcohol (PVA) Mold Release & Air Dry Agent is used as an air-barrier on top of catalyzed polyester resin without wax, catalyzed polyester gelcoat without wax, or catalyzed polyester structural putty without wax to allow a proper, tack-free cure. I spray painted my May 7, 2013 · Learn how to repair your boat's scratches and dents. PVA is essentially a brush/spray on saran wrap - which cures the surface by depriving the surface of exposure to air - but it is easily washed off. This is the piece that you would like to replicate for Mar 6, 2015 · Yes poly gel coat is OK over vinyl ester but you will need PVA (or a wax additive) over the gel coat. WARNING WHEN USING PVA = clean your gun with acetone. Once the gelcoat has cured, it doesn't matter when you remove PVA from the surface. spray PVA . In the video I mentioned that there were 2 common ways to do this; spraying or brushing. Once the gel coat has cured, the PVA can then be washed off with soap and water. The problem with this method is getting the right amount of material misted onto the un-cured gelcoat to block the air out and in gauging just when to apply the PVA. It said that PVA would dissolve in HOT water but not Cold water. An alternative to that is to tape a piece of wax paper around the entire gelcoat repair so air doesn't get to it. If the laminate sits overnight you need to scuff the surface for a mechanical bond and to deburr. Once PVA has begun to come off the non-skid rubber pattern, wash the remaining PVA off with water. It washes off completely with water. Home How To & Tools Gel Coat Application Guide - How to apply gelcoat correctly Gel Coat Application Guide - How to apply gelcoat correctly Gelcoat is a resin system that is filled with colorants and thickening agents and applied to a mold surface to form the cosmetic and weathering coating of a composite part. For the final coat, a PVA curing agent must be sprayed onto the surface as the gel coat begins to gel. Fibre Glast offers spray guns specifically for gel coat. It is most often sold in liquid form, which requires spray equipment for best results. Then catalyze the next coat and spray on a full wet coat. Dec 25, 2008 · I bought an 8oz bottle of PVA to spray on gel coat. It has a light orange peel finish that requires multiple steps of sanding before you reach gloss. Spray any paint! Refillable touch up and air brush spray for pro and DIY jobs that deserve the best look. Typically you start with a mold than apply a release agent. I pretty much understand that if I spray 2 layers (no wax) with the Preval sprayer, the third layer will have to be either gel coat that contains wax or a layer of gel coat, then PVA to seal it up so that it will harden. You can use either a heavy-duty, reusable plastic cup or disposable paper cup for Gelcoat Spraying Questions - Moderated Discussion Areas Hop to: Sep 9, 2009 · I now exclusively use PVA (poly-vinyl acetate) as it consistently provides a fully cured hard surface. flush with WATER then flush with acetone. . Reduced porosity: In tooling gelcoat. The application process is slightly different for each use but hopefully this guide will give you a good idea of what needs to be done when working with gel coat. Hair spray as a mold release A number of years ago, my friend Jack Anderson used hair spray in place of PVA as a mold release. But the results are worth the trouble. So I want to reapply a gel coat finish to the center console where I did some repairs. 2 PreVal sprayers (Home Depot - < $5 each). The convenient and affordable Preval Sprayer will provide a high-quality gelcoat finish to your boat’s surfaces. This film seals off the air and allows the gel coat to cure to a hard finish. Hi-Gloss Additive converts gel coat to air-cure chemistry, leading to a smooth, porcelain-hard surface. Apr 4, 2011 · Gel Coat Repair Method Page 1 of 1 Page 1 of 1 Board index » Hobie Catamaran Sailing » Help with repairs All times are UTC [ DST ] Nov 18, 2013 · Getting to the point of applying your color matched gelcoat is one of the last steps in finishing off your repair (s). Spray Guns can be used to effectively spray gel coat, PVA parting film, and a wide selection of primers. Jun 11, 2019 · The purpose of the wax is to create a barrier between the gelcoat and the oxygen in the air so the gelcoat can fully cure. Learn more about PVA and where we will be showcasing our innovative manufacturing solutions. 8oz. With a large selection of nozzle tips, users can spray everything from automotive paint, clear coat and PVA to primer, metal flake gelcoat or undercoating. Duratec Clear High Gloss Additive can be used in applications Nov 11, 2019 · PVA Water Based Mold Release - Polyvinyl Alcohol Agent for Epoxy, Polyester, Vinyl Ester, Resin, Gel Coat, Polyurethane Foam, Silicone - Spray or Brush-On Film for Sculpture and DIY Projects TotalBoat ISO/NPG neutral and white marine gelcoats compatible with coloring agents. May also be used in lieu of mold release wax when working with polyester, gelcoat or epoxy resins. The catalyst to set off the reaction with the gel coat is methyl-ethyl-ketone-peroxide (MEKP). PVA is suitable for use with polyester fiberglass, vinyl ester, gel coat, epoxy or urethane resins and foams. Jan 5, 2011 · Partall Film #10 PVA Surfacing Agent For Gel Coat: Use this product as a surfacing agent when using Gel Coat without wax additive and typically larger spray applications. This article will discuss how to apply the gelcoat with the brush and roller method. That is because both vinyl and poly are air inhibited - which means that they do not harden until air deprived. PVA won't hurt a thing in my experience. Gelcoat does not fully cure without first supplementing it with a surfacing agent or wax additive sanding aid. Improves air release, thus Nov 27, 2011 · Re: Gel Coat is tacky. Wet Sanding: Employ 320-grit wet/dry paper on a soft sanding block, focusing on the repair area. Gelcoat may be thinned for use in a Portable Preval Sprayer with styrene monomer. Also, when these products are mixed in, no PVA is required to achieve a full cure. Lastly, consider the spray gun that is being used. Question 1: The fact that the pot life of the gel coat with catalyst is between 5 and 15 Features: No dull surface: Additive eliminates the need for wax & PVA creating a superior finish. It may be applied over polyester repairs, or gel coat, as a surface layer for airless tack-free cure. The Bottom Paint Store distributes ES Manufacturing Gelcoat Spray Guns. Partall Film #10 is a polyvinyl alcohol (PVA) water/alcohol solution of water-soluble, film-forming materials. Typically used in conjunction with waxes during PVA sealer / release can be applied to the mold or any porous surface that needs to be sealed by brush, spray, roller or sponge. PVA Partall #10 resists the solvents in the polyester or epoxy resin system and is water soluble, making cleanup easy. It cleans with water. Available in Clear or Green. What Products Do I Use to Paint a Livewell? Jun 16, 2009 · The gel coat won’t cure when exposed to oxygen. We will assume you have already read the article to learn about prepping the surface, sanding, and finishing the gelcoat. 50oz mat with LBI 33540 Step 5: Apply 3 layers of 1. PVA Water Based Mould Release - Polyvinyl Alcohol Agent for Epoxy, Polyester, Vinyl Ester, Resin, Gel Coat, Polyurethane Foam, Silicone-Spray or Brush-On Film for Sculpture and DIY Projects 200+ bought in past month Add to cart For an optimum surface cure spray PVA release film over the gel coat patch during the curing process. ), or add 1oz per quart of a wax additive sanding aid. Promotes complete cure of polyester gelcoat. D. This agent creates a thin film on the surface of gel coat. It is acceptable to wipe off the tackiness with a cloth and acetone. Nov 9, 2014 · wax, pva, and gelcoat Discussion in ' Fiberglass and Composite Boat Building ' started by JEFFHEENAN, Nov 9, 2014. Jan 9, 2018 · Partall Film #10 can also be used as a surface cure agent during gel coat repairs (locks out moisture in the air that inhibits resin cure). 0 mm. Immediately apply the PVA (with an airbrush or Preval sprayer) spray a fine coat of PVA and then apply heat. Mar 23, 2015 · When your prep work is done and the surface is ready, Catalyze the gel coat, but only catalyze as much as you'll use in a single coat. UV rays will yellow the Sep 14, 2012 · This entry was posted in Gelcoat, Gelcoat Spray Guns and tagged gel coat spray gun tip size, gel-coat spray guns, gelcoat spray gun, spray gun tip size on September 2, 2014 by Jason Revie. Feb 2, 2010 · Re: Primer for Gelcoat? It won't cure or spray well at lower temps and depending on where you bought the gel coat they should also sell surface wax so it will cure correctly and not be tacky, its easier to use than PVA. Apr 2, 2024 · Applying PVA Effectively Apply PVA using spray equipment including a spray bottle or with a brush, ensuring complete coverage without puddling or drips. ) Product Description Duratec 904-001 High Gloss Additive enhances gelcoat applications by eliminating wax and PVA, providing a smooth, paint-like spray with excellent durability. You also need to apply the gel coat thick enough, if you plan on sanding, 30 plus mils may be needed and this will help the cure. Sounds like you did not use a release agent. has the gelcoat you need for the job. The GX1000 can even be used to sandblast! POLYVINYL ALCOHOL (PVA) PARTING and MASKING FILMS REXCO is the leading manufacturer of PVA film-forming solutions (parting films) for composites in North America. Do a test panel and see which works better for you, wax Whether you're doing a repair (boat, snow mobile, RV, swimming pool, shower, tub, sink, etc) or making a mould Rayplex Ltd. Mar 10, 2011 · Gelcoat on Epoxy Fairing (West 410) lateral Construction, Maintenance & Refit 2 13-09-2011 01:15 Gelcoat on Expoy sailorboy1 Construction, Maintenance & Refit 18 27-07-2011 08:08 Restoring Old Gelcoat s/v Jedi Construction, Maintenance & Refit 10 16-07-2011 11:32 Gelcoat applied, no catalyst used D. Almost a misting. Don't try to put it on too thick - especially on the first coat. 8 – 2. I also used a cheap plastic painters tarp to cover the entire ski to make sure nothing got hit with overspray. Multiple coats—optimally, three to five for new molds—are usually recommended, with each coat perpendicular to the preceding one, to ensure thorough protection. PVA is available from Evercoat and others and is easily sprayed over your repair with the Preval. PVA Partall mold release film application guide. D. Gelcoat must be protected from the air in order for it to cure. Catalyzing Apr 7, 2020 · The gel coat needs to crosslink with itself right from the start without interference from the atmosphere. If you don't use gelcoat with wax, then you'll need to spray or brush on some PVA over the gelcoat after it sets up. It is a colored liquid that you just spray with a spray bottle or spray gun over your final coat that seals the gel coat from air. Spray-On for Sculpture and DIY Projects - 8oz. 99 disposable sprayer for applying a finish layer of gelcoat. This entry was posted in Gelcoat Spray Guns and tagged gel coat, gel-coat spray guns on February 19, 2024 by Marketing. The inexpensive power unit merely is replaced by a fresh one when the fuel is exhausted. Most spray gun manufacturers will provide this information in their product overview. 50oz mat with LBI 33540 Repeat Step 5, until desired thickness has been achieved. Sep 8, 2023 · First of all I have read many of the other threads on Gel Coat alligatoring problems, but not all of them To be honest, I am making composite parts for a race car not a boat, but in searching the net, I have found so much more useful information here than anywhere else, which is why I am hoping the knowledge base here can help ;-) My process is as follows: 1. Evercoat PVA (from Amazon). Spray from a distance that allows PVA to atomize (mist) completely before coming in contact with the gel coat. Mold Supports and Apr 28, 2005 · I'm interested in any experiences people may have had in spraying primer or paint into a mold instead of gelcoat and laying up directly on the paint or primer using epoxy resin. PVA (polyvinyl alcohol) is sprayed on the surface of gelcoat without wax in order to make the gelcoat cure properly. It is a water soluble material that can be used either as a release agent when applying gelcoat as a first layer into a mold, or to act as an air-inhibiting agen May 14, 2020 · You can’t forget to coat the wet gelcoat with PVA (polyvinyl alcohol) or it won’t dry tackfrede. That’s one of the benefits of these additives, and for this feature alone, I feel it makes them a very user friendly way to spray gelcoat for the DIY. Next decide if you want to use an aluminum, plastic or paper cup to house the gelcoat. To cure properly and completely, gelcoat needs to be devoid of oxygen. PVA is short for polyvinyl alcohol. 3. Nov 19, 2020 · as mentioned, gel only cures in absence of oxygen. Jan 16, 2013 · Re: Gelcoat and Duratec Clear High Gloss Additive You need the wax to seal the air from the surface and get a hard surface. Perfect for smaller applications of gel coat or spraying PVA. Spraying Gelcoat: For best results spraying gelcoat, it is recommended to use a spray gun designed specifically for applying gelcoat and resins, such as the professional grade spray guns offered by FGCI and ES Manufacturing. Please specify the color and size you are inquiring about. (Essential for all types of Gelcoat repairs and so easy to use. As a dry film, PVA is resistant to the solvents in a resin system, but is water soluble. I think if I thinned the PVA just a little it would be usable. So following a standard May 27, 2022 · Gel coat has many uses including mold construction, manufactured parts, cosmetic gel coat repairs and yacht/boat construction. Jul 23, 2019 · After waxing and PVA, I spray 5 16oz cups of gelcoat to about 15mil thickness using alternating passes of fore-aft and side-to-side. After curing, spray 1 16oz cup of VE primer. PVA Mold Release Agent is a water-soluble liquid mold release agent forms a smooth parting film allowing a glossy finish on molded surfaces. Jan 27, 2005 · Spraying gelcoat over gelcoat Discussion in ' Fiberglass and Composite Boat Building ' started by alexhiguera, Jan 27, 2005. Nov 29, 2009 · Just got a Preval Spray Gun, a neat little $6. Pot life is fairly short and HVLP gun cleaning must be extremely thorough, like tearing the front of the gun apart. Also removes tackiness on a non-waxed gel coat Oct 29, 2011 · Brushing spray gel coat Discussion in ' Fiberglass and Composite Boat Building ' started by bigjonny9, Oct 29, 2011. There are also some high gloss additives you can put in it that seal it off and make it flow better. It dries to the touch within an hour. Spray PVA onto the sprayed Gel coat approximately 15 minutes after applying the coat. PVA is better than a wax additive PVA Water Based Mould Release - Polyvinyl Alcohol Agent For Epoxy Polyester, Vinyl Ester, Resin, Gel Coat, Polyurethane Foam, Silicone-Spray Or Brush-On Film For Sculpture And DIY Projects Nov 3, 2023 · With over 30 years of successful use, Duratec Hi-Gloss Additive #904-001, is the proven leader for post-application gel coat work. Partall® Film #10 PVA Surfacing Agent For Gel Coat: Use this product as a surfacing agent when using Gel Coat without wax additives and typically larger spray applications. This will allow it to fully cure. Construction, Maintenance & Refit 4 03-07 Step 1: Spray 15-20 mil LBI 304 Tooling Gelcoat Step 2: Spray 2nd coat 15-20 mil LBI 304 Tooling Gelcoat Step 3: Apply layer 1. Key Features Used to release molds when sprayed with gelcoat Removes White, Black, Neutral Tooling Gelcoat: Production molds Available in Brush Or Spray Super Black or Super White Gelcoat Blackest Black or Whites White Available- Spraying Only 321 Ultra Spray White: Sprays using a Preval Sprayer 322 Color Matched Gelcoat: Color matched to your sample provided. Let the pattern dry and reapply PVA with a spray gun by misting. Also have considered painting it, but Feb 2, 2024 · Spraying gelcoat is a great way to restore the appearance of your vessel. You need about 1. 5% to kick the gel coat in about 10 minutes. Use this product as a surfacing agent when using Gel Coat without wax additive. Surfacing wax and special patch thinners are needed for the last coat. In this comprehensive tutorial, we show you how to spray gelcoat like a pro on a budget! Whether you're a DIY enthusiast or just looking to save some money o Gelcoat is available with or without wax. Next step would be a layer of laminate, less than 12 hours later another layer. Jun 17, 2020 · Gelcoat does not fully cure without first supplementing it with a surfacing agent or wax additive sanding aid. Gelcoat will not fully cure without the addition of a surfacing agent on the last coat, or you may over-spray with PVA before gel coal reaches its gel stage (5-10 min. ) PVA makes manufacturing easier by supplying best in class fluid dispensing and selective conformal coating solutions. Make sure that the spray tip you plan on using will be supported by the gun. Spray PVA on mold surfaces in Jan 13, 2019 · Sprayed gel coat doesn't self level like auto paint. Aug 3, 2011 · Applying the PVA right after you spray the gel coat will also trap the styrene in the gel coat and not allow it to evaporate, this helps the cure. I would just put another layer over what's there, no acetone wash, the surface is still sticky and the new gel coat will bond well to it. Item #126-A is a gravity fed HVLP-style gun that features a 2. 4 5 ratings Nov 11, 2016 · If you are happy with the unwaxed coats, I would apply wax to the final coat AND spray a few coats of PVA OR spray the final coat unwaxed and then coat with PVA. Better profile: Flat & smooth profile compared to un-modified gel coat or gel coat with wax & styrene. Mar 19, 2021 · Have a large area of gelcoat that needs to be repaired on your boat? Spraying gelcoat may be the best method for applying it. In this case PVA . ) An alternative to using surfacing wax in the gelcoat mix is to over spray the gelcoat with PVA, (polyvinyl alchol). A disposable sprayer that sprays up to 16 ounces of liquid. Details: Gel coat is a formula. Anybody know how much to thin gelcoat for application with this little toy? What do you thin it with? Thanks! PVA Water Based Mold Release - Polyvinyl Alcohol Agent for Epoxy, Polyester, Vinyl Ester, Resin, Gel Coat, Polyurethane Foam, Silicone - Spray or Brush-On Film for Sculpture and DIY Projects - 8oz Brand: Uniproducts 4. So my question is heat and mix a little hot water in it? Or maybe just heating PVA Water Based Mould Release - Polyvinyl Alcohol Agent for Epoxy, Polyester, Vinyl Ester, Resin, Gel Coat, Polyurethane Foam, Silicone-Spray or Brush-On Film for Sculpture and DIY Projects Jul 2, 2021 · PVA Water Based Mold Release Agent IMPROVED Spray Nozzle - Polyvinyl Alcohol Agent for Epoxy, Polyester, Vinyl Ester, Resin, Gel Coat, Polyurethane Foam. Directions on how to apply Partall properly to your fiberglass molds. CAN PVA BE APPLIED USING A BRUSH INSTEAD OF A SPRAY GUN? PVA can be applied using a brush, cloth, sponge or roller or the part may be dipped in the PVA and drained. The agent can be washed This item: PVA Water Based Mould Release - Polyvinyl Alcohol Agent for Epoxy, Polyester, Vinyl Ester, Resin, Gel Coat, Polyurethane Foam, Silicone-Spray or Brush-On Film for Sculpture and DIY Projects Use where full cure of unwaxed (laminating) gelcoat is desired. Before we start the spraying process, it’s important to know why you would choose gel coat over paint for your boat so you don’t get confused. The PVA Delta 8 is a flexible robotic conformal coating/dispensing system that is ideal for selective coating, and meter-mix applications. 323 Clear: Used for metal flake or for marble bath ware. For a more comprehensive guide on How to Apply Gelcoat, please read this article. This water-soluble liquid mold release forms a parting film, which results in a glossy finish on molded surfaces. In this video, we explore the revolutionary $10 gelcoat sprayer that is changing the game for DIY enthusiasts and professionals alike! We'll dive into its features, performance, and how it can Gelcoat does not fully cure without first supplementing it with a surfacing agent or wax additive sanding aid. Acetone, because I literally could not find Styrene. Eliminates low-gloss: Especially areas on the edges of repairs, like the low-gloss "donut" often seen in gel coat repairs. then WATER. In this guide, you will learn how to spray gelcoat on your boat like a pro. 5mm nozzle, which is an excellent starting point for spraying gel coat. Nov 1, 2005 · I'm doing a repair/resto job on an older ,small whaler and would appreciate any tips/tricks for spraying gelcoat. PVA (Poly Vinyl Alcohol) Patch Sealer - Eliminates the tackiness from the spray patch by creating a seal from the oxygen. Promotes complete cure of un-waxed and laminating Polyester Gel Coat. Progress to 600-grit paper for near-evenness. Spray several super thin coats. You can spray it with polyvinyl alcohol (PVA) before gelcoat reaches its gel stage (5-10 min. It is also water soluble, so is just removed with a wet towel after the gel coat cures. Using proper spray techniques, mist the repair area with gelcoat and allow half an hour for the gelcoat to kick. If you can't fine wax or PVA you can wipe the surface down with acetone to remove the sticky layer before sanding. The ES G830 gun will support a range of 0. Applying the PVA right after you spray the gel coat will also trap styrene in the gel coat and prevent it from evaporating, thus aiding the curing process. 5oz mat with LBI 302 or 901 resin Step 4: Apply 3 layers of 1. Nov 25, 2014 · Final layer should use gelcoat with wax, a paraffin wax additive, or PVA spray to cure tack-free Once fully cured, wet sand and buff, then finish with a marine wax for maximum gloss and protection Application: Apply the mixed gelcoat to the repair area, slightly raised above the surrounding surface for sanding. Partall® Film #10 is a water/alcohol-based polyvinyl alcohol (PVA) mold release agent that forms a barrier between parts and mold surfaces that are still curing (green or recently reconditioned molds can be reactive). Ready to spray: Sep 15, 2022 · Professional Grade Exterior Gelcoat can be applied either by Spraying, Brushing or Rolling. Packaged in 1-gallon, 5-gallon and 55-gallon container sizes. Gelcoat with wax has had paraffin wax added to it. When manufactuers spray the gelcoat in a mold the mold does this for you. " Oct 27, 2010 · You might just want to skip the wax and spray PVA over the gel when its tacked off. We'll show you how to DIY! We probably aren’t talking about the same thing. Apr 27, 2014 · "An alternative to using surfacing wax in the gelcoat mix is to over spray the gelcoat with PVA, (polyvinyl alchol). PVA may be used in conjunction with a top c PVA Tooling gel coat (or unwaxed gel coat) Gel coat spray gun (recommended) or brush Chopped strand mat Ortho or ISO polyester resin MEKP catalyst Spreader Fiberglass roller Plastic wedge Polishing agent Plug Preparation The first step in making a fiberglass mold is preparing your plug. PVA Water Based Mould Release - Polyvinyl Alcohol Agent for Epoxy, Polyester, Vinyl Ester, Resin, Gel Coat, Polyurethane Foam, Silicone-Spray or Brush-On Film for Sculpture and DIY Projects 200+ bought in past month Add to cart Partall Film #10 - PVA Polyvinyl Alcohol Pint Jul 29, 2012 · Can I just give it an acetone wash, new layer of gel coat and spray the pva? It sounds to me that you are saying I will have better luck with the pva. Output Pressure: 70 psi Professional- grade finish Made in the USA Apr 19, 2016 · The gelcoat and MEKP hardener. What to Use it for Ideal for achieving a high-gloss, durable finish on gelcoat surfaces, reducing porosity, and preventing yellowing and UV gl PVA Mold Release Agent for Gelcoats and Resins Polyvinyl Alcohol, or PVA is a mold release spray that is easy-to-use for all composite molds or epoxy projects. PVA may be used as a sealer to prevent tackiness to the final cure. SKU 105685 Used to release molds when sprayed with gel coat. However, there are sources of PVA in aerosol form which makes spray application convenient for small part laminators. 105685 – PVA Mold Release, 8 oz. Make note: Too much PVA can cool down the Gelcoat heat reaction. Clean the unit by spraying acetone for two or three seconds. Curing Process: Spray the gelcoat with a PVA curing agent and peel off the PVA when cured. I am using a Prevail sprayer but it clogs up during use. so add a wax additive (we call it patch aid) or spray with pva when done to seal it off. Blue nitrile gloves (Harbor Freight); gelcoat is sticky. I was looking for possible suggestions and came across the raw granulated form. As such, you need to spray it with water soluble poly-vinyl-alcohol (PVA) to seal it from the air to allow it to harden. These solvent-resistant yet water-soluble films are used as a chemical barrier to protect mold surfaces and to aid in de-molding of FRP/ GRP and cast polymer parts or molds from plugs. eyrjoszohinqfctyhttrulhnbwxqmtkzndichdnghtfuhhuedoqasxjhnmwsrfcxrfzughvruciigcbid