Permobond® RS-5610 Black Bromobutyl Rubber Protective Rubber Lining allows the same workability as other butyl linings but exhibits stronger physical characteristics than the other butyl counterparts. The RS-5610 comes with an optional proprietary bonding layer for added adhesion. The Rubber Source bonding layer also will give the same service condition resistance as the face stock. The 5610 can handle constant temperatures of 260°F (127°C) with temperature spikes to 310 °F (154°C).