Sikacryl®-621 Fire+ is a fire resistant, high-performance, one-component fire-resistant acrylic sealant designed for interior applications where fire protection is required. This flexible, low-odour sealant effectively prevents the spread of fire, smoke, and toxic gases through construction joints and gaps in walls, floors, and ceilings for up to 4 hours, in compliance with recognised fire safety standards. It offers excellent adhesion to various building materials such as concrete, brickwork, and plasterboard, without the need for a primer. Easy to apply and overpaintable, it is ideal for both professional and DIY use in fire-rated partition walls and service penetrations.