Bock TAPE 501-AFL is a premium aluminum foil tape with a 50µm backing thickness, strong emulsion acrylic adhesive and equipped with an easy-release silicone paper liner. 501-AFL is used for applications where strong holding power and high resistance to extreme temperature conditions and aging are required. TAPE 501-AFL is typically used for FSK facing joints, HVAC duct application and as well for high temperature masking applications in the pipe coating industry.