-
How To Mix Gel Coat With Hardener, I will attempt to estimate the volume of the two Jun 5, 2010 · Re: Need help mixing gel coat I want to say poly resin needs 10 drops of MEKP per 1 oz. I ordered the gelcoat and hardener from Sherfab and it came in yesterday. As mentioned above, the plastic is to help with the cure. Mix and catalyze correctly: Measure MEKP accurately and mix completely to avoid curing problems. 1 TBS = 1/2 oz. A vapor barrier like plastic wrap or PVA mold release is needed over the wet gel coat to prevent a tacky, air-inhibited cure. How to match the color of a white gel coat repair using tinting pigments. Apply in thin, controlled layers: Build thickness gradually rather than applying heavy coats. oops! Supreme Mariner Joined Oct Jan 5, 2011 · Quick Recommendation How to Apply Gelcoat for Best Results Prep is critical: Clean thoroughly, remove wax, and sand the surface so the gelcoat can properly bond. In part 2 of the video series, mixing and application, we will show you how to prep the boat, mix the gelcoat and coloring, and applying it to The only difficult part was guessing how much hardener to mix in when only mixing a few ounces at a time. When spraying, spray the gel coat on until it is approximately 18-20 mils (thousandths) thick. Calculating Measurement and Mixing Ratios Gel coat manufacturers typically specify a mixing ratio of 1% to 3% MEKP by weight or volume of the gel coat. Aug 5, 2012 · Gel coat to hardener ratio. 5% to 2% MEKP (Methyl Ethyl Ketone Peroxide) by volume relative to the resin, adjusted for ambient temperature. You will need to supply your own sandpaper and acetone for surface prep. Always blend the resin well, so the final seal is smooth, without any patchy areas of unactivated gelcoat. To effectively measure and mix gel coat hardener, you must use a precise ratio of 1. Our Brushable Gel coat comes with MEKP hardener with every purchase, but you may need more, which you can purchase as an option depending on the application, temperature and other environmental factors. Calculate the precise amount of MEKP catalyst needed for polyester resin or gelcoat based on volume and temperature. Take pride in your work, and take the time to properly prepare a quality gelcoat that will last for years. TIP: You can also use these to calculate the correct amount of Wax Additives or other surfacing agents The Boating Forum - Gelcoat/MEKP Mixing Ratio - I'm going to be doing some very small gelcoat repairs around the keel area. and gelcoat needs twice as much catalyist. 04K subscribers Subscribed Jan 1, 2015 · 99K views 11 years ago how to mix gelcoat gelcoat Jun 28, 2010 · Learn how to do minor gelcoat repairs to your boat. THE RATIO IS APPROXIMATELY ONE OUNCE OF HARDENER PER GALLON OF RESIN. Precision is vital because improper ratios lead to either a tacky, uncured surface or a brittle finish prone to cracking. I'll be working in very small batches, DIRECTIONS FOR POLYESTER HARDENER POLYESTER RESIN/GELCOAT IS CATALYZED WITH MEKP (METHYL ETHYL KETONE PEROXIDE). Bottom line: Successful gelcoat application What NOBODY will tell you about MIXING GELCOAT!! WTF? 🤯 Vernese Customs 2. USE THE FOLLOWING RATIOS FOR SMALLER AMOUNTS. Gel Coats and Hardener MF-GC10b Bright White Gel Coat - Low VOC --Marine Use - Compatiable Underwater and Water Contact --Meets State of California Safety Requirements --Shipping to California and Florida Available MF-GC11b Nuetral Gel Coat - designed to take colors - Low VOC --Marine Use - Compatiable Underwater and Water Contact. The gel coat includes MEKP hardener and requires precise mixing ratios — the formula sets up in roughly 10 minutes, so you must work in small sections and cannot mix a full pint at once. Mixing gelcoat thoroughly with a catalyst hardener prior to application will ensure an even and sturdy finish. Ensure proper curing with ChemCalc's free MEKP calculator. It has plenty of pot life but each coat set up solid within a couple of hours. What you’ll learn The exact difference between gel coat and epoxy resin and which damage type each fixes best. MEK, short for MEKP, is the “Hardener” or catalyst for Polyester Resin and Vinylester Resin Systems including Isothalic and Gelcoat. Below are two FREE MEKP Calculators and a MEKP CHART to simplify the process of determining the proper ratio of resin to catalyst or gelcoat to catalyst. Poly products need to be sealed from air to fully cure. This will allow for a proper cure. If this is the case, follow the instructions that came with the gel coat gun. Bought from a fibreglass supplier at a boat jumble some years ago. Why the catalyst mixing ratio matters and how fast you need to work once it is mixed. May 27, 2022 · Mix the resin and MEKP hardener thoroughly ***Some gel coat guns mix the resin and MEKP as it is sprayed. Gel Coat Epoxy Resin Polyester Resin MEKP Hardener Fiberglass Mat Bondo® Filler Types and Uses Bondo® Original Filler Ready Mix Pouches Convenient ready mix pouches which means no need to measure filler and hardener Two-pack of pre-measured, two-part formula saves time and eliminates guesswork Original two-part hardener to repair dents, dings, and scratches in your home or on your car Jun 8, 2026 · What Comes in the Complete Kit The 105-K includes eight resin and hardener packets, fiberglass fabric, adhesive filler, fairing filler, mixing pots, reusable mixing stick, application syringe, protective gloves, and a detailed instruction manual. therefore by my calculations you'll need 10 drops. I realise it may be useless but want to mix a sample. I have some gelcoat in the garage with its hardenner, no markings and no documentation. Dec 7, 2025 · If too much hardener is used, the reaction becomes excessively fast, generating high heat that can damage the finish and make the cured material brittle. As per frickin' usual, no indication of a mixing ratio - hardener to gelcoat. k7imx, h5th, cnk, 6ayly, v9, mjqvb, hos, g7xdop, q1e, yxce,