Firestop - Self-Seal® Mineral Wool MW-300 2IN x 4IN 25LB BAG 24/CS

Self-Seal® MW-300 Mineral Wool is ROXUL SAFE™, cut into a variety of different sized strips for easy installation with Self-Seal® Firestopping Products. It is a NON-COMBUSTIBLE specially formulated, pre-sized, semi-rigid mineral wool strip with a nominal 4.5 PCF (72 kg/m3) density. The combination of basalt rock and slag results in a non-combustible product with a melting point of approx. 1,177°C (2,150°F). This formulation gives excellent resistance to fire and is naturally water repellent, yet vapour permeable.