HTH TALL VAPOUR BARRIER SEAL
Tall vapour barrier seal for pipes installed through the vapour barrier on an inclined or low-pitched roof (height 133 mm)
Made of EPDM rubber; operating temperatures between -30 and +90°C
Should be installed with bitumen if a roof's vapour barrier is made of bitumen, and with a board made of hard material on top of the vapour barrier valve if a roof's underlay material is made of profiled sheet metal