Poly-Optic® 1411 Clear Casting Resin is a two-part, liquid polyurethane resin that cures (RTV) to a water-clear, Shore D80 plastic. This product has a simple 1A:1B mix ratio by volume. Vacuum and/or pressure casting techniques are recommended for this product. Cure inhibition can occur when casting this resin in tin-cured (Condensation) silicone rubber molds – use a platinum-cured (Addition) silicone rubber mould if working with silicones.
EXTERIOR USES: Although Poly-Optic 1411 is a non-yellowing formula, it is not recommended for long-term exterior use. To improve durability for exterior applications, add 1% Poly UV Additive to the total mix weight of Poly-Optic to reduce the onset of chalking and pitting of the outside surface for ~2 years. Add 3% Poly UV Additive to achieve good exterior stability beyond 5 years.