P-87 resin is a cashew nut oil modified phenol-formaldehyde two-step phenolic resin. It exhibits excellent compatibility in all proportions with NBR. Because of its unlimited compatibility, P-87 is used extensively for modifying the properties of nitrile rubber compounds and solvent cements. During processing, the resin plasticizes the stock, making filler loading and further processing easier. In the cured state, increasing amounts of resin will decrease elongation but will increase tensile strength, flexural strength, hardness, abrasion resistance and rigidity. P-87 will also improve rubber bonding to metal as well as adhesion to fabrics.