Pre-compressed BG-1 class impregnated expanding foam tape is used to resist weather ingress for windows and other construction applications. Manufactured to DIN 18542 standards this tape from Siloxa provides a durable, weathertight and airtight seal. See technical data sheet for full details. Applied in its pre-compressed state the tape expands to uniformly fill perimeter joints between frames and substrates, compensating for irregularities whilst maintaining a consistent seal. It is tested to withstand wind-driven rain to 600Pa.