Low Emission Gelcoat (<1% Styrene Emission)

This low emission gelcoat is formulated on an orthophthalic polyester base using reactive diluents and wax-based surface sealing technology to reduce workplace styrene vapor emissions during application and cure. Styrene emission levels during spray application are below 1% of the applied weight, representing a 60–80% reduction compared to conventional gelcoats. This is achieved through a combination of reduced styrene content (below 30%), wax addition for surface sealing, and encapsulated reactive monomer chemistry. The product meets increasingly stringent European workplace exposure limits for styrene and is designed to enable continued open-mold composite production in jurisdictions where styrene air quality regulations are tightening. The gelcoat is available in white and standard colors. Gel time at 20°C with 1.5% MEKP is 25–40 min. Barcol hardness 38–45 post-cure. Mechanical properties are comparable to standard ortho gelcoat. Application by conventional spray gun or brush.