Fire rated one component, expanding polyurethane foam filler. Rapid curing. Has excellent thermal and acoustic insulation properties. Expands 35-40 times its initial volume. Excellent primerless adhesion on most construction materials. Conforms to all international standards including CE marking. Ideal for use in passive fire protection systems such as large gap filler; installation of fire retardant window and door frames; sealing of expansion and connection joints, penetration seals. Fire rated EN1350-1 Reaction to fire class E, ETAG-026 Part 1 and Part 3, EN1366-4 Fire resistance up to 4 hours depending on joint configuration. BS476 Part 20 – Fire resistance up to 4 hours depending on joint configuration.