Intumescent movement joint products have been tested to BS476 Part 20, for up to 4 hours fire protection.

Fire Rating

Joint size mm	Fire rating	Seal	Product size  T x W mm
15-30	2 hours	Dual	32 x 25
	4 hours	Dual	32 x 50
31-50	4 hours	Dual	52 x 50
51-75	4 hours	Dual	78 x 50