KemStop FR Acrylic Sealant

KemStop FR Acrylic is designed to prevent the spread of fire and smoke through joints and openings in fire rated walls and floors including openings formed around building service penetrations. KemStop FR Acrylic will also maintain the acoustic design performance in walls and floors.

KemStop FR Acrylic cures when it is subjected to atmospheric conditions, however, it will retain a degree of elasticity for joint movement. Under fire exposure, KemStop FR Acrylic creates a robust fire seal by the formation of a durable intumescent char.

KemStop FR Acrylic can be used with a suitable filling material, i.e. stone wool or KemStop Backing material in order to secure correct width to depth ratio and to reduce the shrinking of the sealant during curing. Minimum depth and maximum width of the joints are included in the installation instructions. Thermal activation takes place at about 180°C when the material will expand (intumesce) and prevent the passage of fire and smoke for periods up to and beyond 4 hours.

Features and benefits:

• Classified for fire sealing all types of constructions and building service penetrations.
• Very high sound insulation.
• Low emissions - environmentally and user friendly.
• Simple to apply with a smooth surface finish.
• Permanently flexible – will accommodate movement up to 12.5%.
• No priming necessary for application to most materials.
• Suitable for most surfaces including concrete, masonry, steel, gypsum, glass, plastics and most non-porous surfaces.
• Hardens quickly, tack-free after 1 hour (the fire performance specification of the joint filler has been derived when the joint filler has been let to cure for a month).
• 18 months storage time (under correct conditions).
• 30 years working life.