PG 500 is a high quality formulation suitable for use as a cold-applied bonding agent for SBS roofing systems as well as various other membrane systems. PG 500 has a heavy, "trowel-grade" consistency which makes it ideal for flashing details, attachment of membrane to steep slopes and parapet walls and a variety of waterproofing repairs. Its flexibility and elasticity make it superior to standard plastic cements especially where there are moving joints.