Product Data Sheet Version 09 / 2012 Biresin® S15 Areas of Application Product Benefits Gelcoat for polyester and foam moulds Gelcoat for LP-RIM-moulds Gelcoat for gauges and negatives in tooling Gelcoat for foundry patterns Gelcoat for laminates and other constructions With hardener (B) Biresin ® F4 (mixing ratio in pbw 100 : 10) as a casting resin for repairs and correction up to 10 mm thickness Green gelcoat with good spreading properties Good mechanical resistance Good workable Good chemical and heat resistance With hardener (B) Biresin ® S15 R for shorter potlife and faster curing Description Basis Resin (A) Hardener (B) Hardener (B) Hardener (B) Processing Data Two-component-epoxy-system Biresin ® S15, epoxy resin, green Biresin ® S15, amine, amber Biresin ® S15R, amine, amber Biresin ® F4, amine, colourless Resin (A) individual components Mixing ratio resin (A) to hardener (B) in parts by weight Mixtures Mixed viscosity, 23°C Physical Data (approx.-values) Biresin ® S15 resin (A) Colour Shore hardness Flexural strength Compressive strength Impact resistance Heat distortion temperature * values after post curing: 2 h / 80°C Packaging Working packages Individual components Biresin ® S15 resin (A) Biresin ® S15 hardener (B) Biresin ® F4 hardener (B) 6 x 0.5 kg net resin (A) + 6 x 0.05 kg net Biresin ® S15 R hardener (B) in a box 5 kg net 6 x 0.35 kg net in a box 2.5 kg net Biresin ® S15 1 / 2 Tooling & Composites Gelcoat, solvent resistant

The material, processing and mould temperature must be from 18 to 25°C. The resin component (A) must be mixed thoroughly before use. Then thoroughly (with spatula or slow speed mixing equipment) and without air entrappment, the mixed Biresin® S15 resin and hardener mixture is applied using a flat, short-haired brush or squeegee. The coating is available in an uniform direction to form a homogeneous, even and void-free surface coat on the mould surface which must be pretreated with suitable release agents. Within geltime a coupling layer or other backfilling layers can be applied to avoid adhesion...