Low Barcol Gelcoat (Flexible, Marine)

This low Barcol isophthalic gelcoat is formulated with a flexible-grade iso resin containing a proportion of long-chain diol or dimer acid to reduce crosslink density and produce a gelcoat with improved impact resistance, flexibility, and crack resistance compared to standard hard gelcoats. The result is a gelcoat with Barcol hardness of 25–35 (versus 40–50 for standard) that can absorb more flexural strain before cracking, making it ideal for boat hulls and marine structures subject to impact, slamming, or hull flex. The reduced brittleness significantly extends gelcoat service life in marine environments where hull impacts with docks, floating debris, and wave slam are common. Based on an isophthalic resin for marine-grade hydrolytic and blister resistance. Pre-accelerated with cobalt, catalyze with MEKP at 1–2%. Gel time 25–45 min at 20°C. Available in white and standard marine colors. The surface is less scratch-resistant than hard gelcoats but far more impact-tolerant.