But can expand up to 17mm full if allowed but over 7mm it will only perform as a gap filler. Provides a weather proof join. Expanding foam tape for sealing joints. · Provides a weather proof join. · Gives thermal and acoustic protection. · BBA Approved · 3/7 will expand from 3mm in its... Along with its excellent acoustic properties, under high compression it will create an industry standard 600 Pascal- rated weather proof seal. Xpanda 600 joint sealing tape is a soft and flexible expanding foam used predominately as a weather-seal to prevent water ingress and retain heat in external and internal applications. AS820 30mm x 3mm x 25M Double-Sided PVC White Foam Tape– Multibond Solutions Ltd Self Expanding Foam Tape - Shanghai Toptape The foam is an open cell polyurethane, heavily impregnated with acrylic based UV and water-repellent resins that also have flame retardant properties. Pascal Rated to 7mm wide, which is the air tight, protection against driving rain 700pa, noise insulation etc. Gives thermal and acoustic protection., BBA Approved Near Me Expanding Foam Tape - Frederick Jones Joint Sealing Tape 3/7 will expand from 3mm in its compressed state to 7mm Pascal Rated but can expand to a maximum of 17mm., 8m per roll