Installing Twinwall Roofing sheets into the Snap In Two Part Aluminium joiner requires applying the Foam Tape to the Base section of the Joiner. This then forms a compressed seal making the installation watertite and flexible in high wind conditions. The foam tape is of a material that does not erode the protective UV layer on the Twinwall Polycarbonate sheeting.
PurchaseSuntuf 20m x 3mm Sunlite Joiner Base Foam Tape