Aluminium tapes can deal with extremely low and high temperatures and light, dust and moisture. This combination of properties is required for insulation and sealing of heating, ventilation and air-conditioning (HVAC) ducts in this sector. Aluminium tapes prevent corrosion and power loss. The tapes vary in thickness, width and temperature range. The tapes nearly all have the French M1 certificate: the highest European class for fire-retardant material.