Fire Silicone B1 FR is a high-performance, fire-resistant, neutral cure silicone sealant designed to provide effective fire stopping in linear joint seals. With a fire resistance rating of up to 4 hours in specific configurations (as per EN 1366 Part 4), this sealant is ideal for construction applications requiring durable and elastic fire protection. It maintains flexibility after curing and is suitable for use on a variety of building materials, including concrete, brick, steel, and aluminum.