Available in 3 sizes: Fentrim® IS 20 -The pre-folded, robust adhesive tape is especially suitable for sealing interior structural joints in solid structures and metal structures where connections are required to window and door frames. Fentrim® 230 grey – The pre-folded and robust adhesive tape is especially suitable for connection between window and door frames to seal exterior component joints in solid structures and metal structures outdoors. Fentrim® 430 grey – Abrasion-resistant tape for exterior applications. Sticks to masonry and concrete without requiring primer.