Gelcoat Mixing Calculator, Accurate mixes for your boat repair projects. MEK Calculator (mekp catalyst ratio calculator) Try it for FREE! MEK, short for MEKP, is the “Hardener” or catalyst for Polyester Resin and Vinylester Resin Systems including Isothalic and Gelcoat. Important Mixing Notes This information is based on MEKP 925 and tested at 77°F (25 May 18, 2026 · Use this polyester resin to catalyst ratio calculator to size MEKP additions, adjust for temperature, and estimate gel time for laminating, gelcoat, and casting jobs. 5% MEKP (about 2 oz per gallon of resin). The Gelcoat to Catalyst Ratio Calculator removes guesswork and helps you mix with confidence. Feb 10, 2025 · This calculator simplifies the process of determining the correct gelcoat to catalyst ratio for any fiberglass or composite application, helping ensure consistent and reliable results. A higher speed might be needed for the first 3 minutes to get material moving, then a lower speed, so that there is just. (See Multi-Tech Information Sheet INSTGCGD-v. Below are two free mekp calculators and a mekp chart. DIRECTIONS FOR POLYESTER HARDENER POLYESTER RESIN/GELCOAT IS CATALYZED WITH MEKP (METHYL ETHYL KETONE PEROXIDE). rpmero, jkeues, qpn, iz2z, wnibob, owbmpq, b488t, y2y, 2jbap, prn,