AT500 is a 40 micron aluminium foil tape coated on one side with an acrylic adhesive and backed with a stong release paper. AT500 is flame retardant and self extinguishing giving a very safe performance where risk of fire is an issue. It meets various specifications including BS476 Part 6 & Part 7 Category 1 and Fire Class M1. AT502 has a good temperature range between -20?C to +110?C.