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Where the Pros Shop

Styrene Monomer

$9.75

Used and recommended thinner for polyester resins and gel coats. Gel coats are typically thinned 2-5% to make them thin enough to spray.

Methyl ethyl ketone peroxide also known as MEKP, catalyst or hardener, is a chemical that is added to polyester and vinyl resins to initiate a cured product. When MEKP is mixed with the resin, the resulting chemical reaction causes heat to build up and cure or harden the polyester resin. MEKP is required with all polyester resins, gel coats and vinyl ester resin.