Coming soon - new Weather Defence Sheathing Board Joint Tape Author Siniat Date 13/02/2017 Innovation For projects which require no enhanced fire or acoustic performance, we have a new Weather Defence Sheathing Board Joint Tape available from the end of March. It is a single-sided self adhesive tape which provides a high performing air and weather-tight seal between the boards. It is flexible and provides excellent bond strength. Joints can be easily checked without the need for close inspection. Each roll of tape provides 25 metres of coverage and available in boxes of 12. The GTEC Non Fire Rated Silicone Sealant will be discontinued.