OlyBond500® Equipment-Free Canister System is a two-component, low-rise polyurethane foam adhesive designed to adhere a variety of board stocks to most roof substrates in both new and re-roof applications, including jobs that require multiple insulation layers. The canisters have all of the same Factory Mutual approval ratings* as our other OlyBond500® options, and can be used for securing both insulation and fleece-back membranes.