H.B. Fuller has developed a series of adhesives based on reactive chemistries. Reactive systems are high performance adhesives and offer physical properties that include high strength and flexibility, as well as excellent adhesion to a variety of substrates such as wood, plywood, particleboard, paper, metals, fabrics, foam and plastics. Types of adhesives offered include hot melt and liquid moisturing curing polyurethanes (sometimes referred to as PURs); two part polyurethanes, one and two-part epoxies; and polysulfide adhesives.