Envirograf Surface Mounted intumescent smoke and fire seals offering a solution to areas where you cannot router the door or frame, used for old doors and listed/heritage buildings doors offering full protection from smoke and fire. Available in veneer and many colours, single and double door kits all include fire rated hinge paper.
Tested on old doors with head gaps up to 10mm, the SDS set sealed and expanded offering protection.
Tested to BS476 Part 22 (1987), achieving an integrity of up to 66 minutes.
BS476 Part 23 (1987).