FlameSafe® Joint Strip is a flexible, highly intumescent firestop material used in concrete and masonry floor and wall joints up to 1″ wide. It forms a strong insulating char that prevents the passage of flame, smoke and hot gases between joints. FlameSafe® Joint Strip is ideal for stadium construction, tilt up panels, curtain wall panels and all concrete and masonry wall and floor construction joint applications where a fire-rated joint is required. US Patent No. 6,207,085.