RS-BB420 Bromobutyl Based Tack Cement is a premium grade tack cement formulated with high quality RS-5610 rubber dissolved in solvent. RS-BB420 has the same temperature resistance as RS-5610, it can handle constant temperatures of 260°F (127°F) with temperature spikes to 310 °F (154°C). It is designed specifically for use in lining operations when bonding high butyl content rubber lining to itself. RS-BB420 provides exceptional strength while allowing for repositioning of the uncured rubber lining. It is suitable for use with autoclave, internal pressure and open steam cure methods.