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 a proprietary bonding layer for added adhesion. The RubberSource bonding layer also will give the same service condition resistance as the face stock. The 5610 can handle constant temperatures of 260°F (127°F) with temperature spikes to 310 °F (154°C).