V-218 is a closed cell neoprene rubber foam coated with high acrylic adhesive . Neoprene gasket tape V-218 offers significant resistance to weathering, IN and It is compatible when in contact with most metal surfaces . Neoprene Gasket Tape V-218 is flame retardant and It also creates an electrolysis barrier between dissimilar metals, making it suitable for hvac applications. Excellent for use when connecting ducts which must be disassembled periodically for cleaning purposes.