Polyester resin catalyst chart If you want consistent repeatable results when using polyester resin systems you need to measure your catalyst and I don't mean counting drops! Use a graduated bucket to measure your resin and Oct 6, 2022 · Fiberglass and resin are two popular materials used by boat builders, car restorers and other fiberglass enthusiasts. Confirm that both the resin and Pro Catalyst com- ponents are within “use-by” dates. How to measure and mix epoxy and polyester resins, how much resin to fiberglass a board, surfboard finbox install directions May 19, 2022 · Our polyester resin has an impeccable viscosity balance, effortlessly saturating surfaces to expedite the process and add no unwarranted delays with wetting out fiberglass While the initial reaction might exude a pungent odor (like all resins), rest assured that post-curing, the resin stands odorless. Since these compounds are unstable in their pure form, they are mixed with inert compounds to form the catalysts used in the industry. DIRECTIONS FOR POLYESTER HARDENER POLYESTER RESIN/GELCOAT IS CATALYZED WITH MEKP (METHYL ETHYL KETONE PEROXIDE). The calculator will evaluate and display the Resin to Catalyst Ratio. Due to this mixing, MEKP can Aug 27, 2023 · A resin to catalyst ratio calculator is a specialized computational tool designed for determining the precise proportion of resin to catalyst in a mixture. Jan 1, 2023 · PDF | On Jan 1, 2023, Mohamed Farsane and others published Unsaturated polyester resins: Catalysts, accelerators, and inhibitors | Find, read and cite all the research you need on ResearchGate This document provides guidelines for estimating resin and catalyst quantities for fibreglass laminating projects. com What is Polyester Resin Topcoat? Polyester resin topcoat – also referred to as flowcoat – is an excellent matrix material in the Applied to fibreglass (GRP) laminate in the presence of a catalyst, its purpose is to provide an additional layer of protection as well as offering aesthetic improvement via pigmentation. Epoxy resins can be measured by weight, but due to the nature of specific gravity of the resin it is important to follow the ratio guide, and the use of electronic scales is essential. Estimating Quantities Based upon Medium reactivity catalyst Butanox M50. Catalyst is added to the resin at a rate of about one percent (1%), or approximately one ounce per gallon. In cool weather (55-60F) catalyze resins in the mid to high range: 301, 301W, 302, 303 & 305 resins at 10-15cc per quart, 40-60cc per gallon ISO Gelcoats at 15-20cc per quart, 60-80cc per gallon What is Polyester Resin? Polyester resin is an excellent matrix material in the creation of fibreglass (GRP) in the presence of a catalyst and combined with glass fibre chopped strand matting (CSM). Catalyst chart for polyester resin, gel coat and vinyl ester marine resins. When resin is curing it become hot as it goes through This document provides a chart showing the volume of methyl ethyl ketone peroxide catalyst needed in percentages from 1% to 1. Nov 11, 2025 · Learn how MEKP catalyst works in polyester resin systems, including ideal mixing ratios, temperature tips, and safety practices to ensure strong, professional results. Thoroughly mix the entire pail of uncatalyzed resin before adding Pro Catalyst Liquid. Best for above the water line structural fixes like center consoles hatches, decking, boxes and more! Comes with the required MEK 925 catalyst. -Mix resin and hardener thoroughly. USE THE FOLLOWING RATIOS FOR SMALLER AMOUNTS. Methyl ethyl ketone peroxide (MEKP) is an organic peroxide used in the marine industry. Air temperature and resin temperature greatly influence resin pot life, gel time and cure time. Ensure MEKP (Methyl Ethyl Ketone Peroxide) is the catalyst added to polyester resins and vinyl ester resins. Epoxy Resin: Epoxy resins are cured with the addition of a hardener. NOROX® MEKP-9 gives consistent room temperature performance with both resins and gelcoats. Boatyard Polyester Resin is a non-spec resin that contains different types of polyester resins. Surfboard building tips and tricks. MEKP acts as a catalyst to initiate the curing process of the polyester resin in gelcoat, allowing it to harden and form a durable, protective layer on surfaces like boats, cars, and fiberglass structures. For Pail orders, MEK needs to be ordered separately. 1 tsp per pint). In order to undergo curing, resins typically contain reactive groups, [2] such as acrylates or epoxides. 5% 1. CLEAR COTE CATALYST CONCENTRATION CHART How much catalyst to use will vary according to the type of work you are doing (fiberglass laminating or resin casting) and how long you will be working on the project. 75% when using it with polyester resins in various volumes. About methyl ethyl ketone peroxide (MEKP) MEKP is a catalyst used in the composites industry for polyester and vinyl ester resins. Try for FREE! MEK, short for MEKP, is the “Hardener” or catalyst for Polyester Resin and Vinylester Resin Systems including Isothalic and Gelcoat. lfi zvvm rslzrpj tdx kqlli kxpchs qbrvlva xkenogu dzwnu eoap afzqp vrsu ikgsv pduwk uir