Pre-Compressed Expanding Foam TapeEXP 6 Sealing Foam Tape 6-15 will provide a weather seal to 600Pa for gaps that vary between 6 and 15mm. If left uncompressed EXP 6 Expanding Foam Tape 6-15 will expand up to 36mm. If you were to let it expand this much it would not create a weather seal but you may find it useful for gap filling.
Weather Seals Gaps Between : 6 and 15mm
Gap Fills (not weather seal): 36mm Max
EXP6 Foam jointing tape is supplied on a roll, pre-compressed and impregnated. It is self adhesive on one side and works by expanding to it's maximum thickness once it is installed in the joint. This produces a 600pa weather resistant seal. As well as keeping the wind and rain at bay EXP6 also provides protection from heat loss, noise transfer as well as providing a suitable seal against dust, moisture & dirt.