OSCB 120 min fire rating (Red)
OSCB 60 min fire rating (White)
Cladding Solutions

SP Firestop OSCB 60 and 120

Enhanced cavity barrier for rainscreen systems.

An advanced intumescent strip fixed to high density non-combustible ROCKWOOL insulation, SP Firestop OSCB is designed to form an open-state cavity barrier within a rainscreen system. This allows ventilation and drainage under normal service conditions, while in the event of a fire the intumescent strip quickly expands outwards to seal the cavity, preventing the passage of fire and smoke.