Sika Boom FR is a one-component, fast-curing, polyurethane foam retarding fire for up to 4 hours. Sika Boom FR is designed for linear joints in brickwork and concrete where fire protection is required. This product is easy to handle and allows the fast application of an insulating layer that reduces thermal bridging. It also provides effective sound dampening and high thermal insulation. Upgrade your construction and sealing projects with Sika Boom FR Fire Rated Expanding PU Foam 750ml, a reliable and fire-safe choice for creating secure seals and barriers while ensuring peace of mind.