3m scotch 431 soft aluminium foil adhesive tapes 3m 70006386091 this foil adhesive tape from 3m is a thin soft aluminium adhesive tape with transparent adhesive for masking sealing reflecting heat and light and masking when anodising aluminium it also serves as a moisture barrierit offers high resistance to ageing strong heat and light reflection good chemical resistance and low flammability class l such attributes make this high quality tape ideal in a number of industries including