Rockwool Intumescent Mastic 1000mm
A simple-to-use retrofit solution from market leaders ROCKWOOL, this intumescent expansion joint seal acts as an effective firestop for construction joints up to 75mm thick in walls and floors. This versatile option has been fully tested to BS476: Part 20 proving its offer of up to four hours' fire protection. Available in a host of sizes to suit your project, this maintenance-free option is a compressible design that's formed through taking a ROCKWOOL core and shrink wrapping a graphite-based intumescent polymer to each face.
Water resistant and ideal for use with blockwork cavities, structural and expansion joints, and curtain wall interfaces, this expertly developed product offers unbeatable fire protection when installed according to the manufacturer's instructions.