TEGOPAC® Bond 251 is a hybrid polymer with a modified backbone that contains hydrophilic segments. With TEGOPAC® Bond 251 it is possible to formulate adhesive and sealant formulations with excellent elastic recovery properties. Formulating with various plasticizers, fillers, and other additives is possible to address applications like assembly adhesives, roof sealing applications or pressure sensitive adhesives. It is possible to blend TEGOPAC® Bond 251 with epoxy polymers. The selective adjustment in the polymer backbone allows TEGOPAC® Bond 251 to develop excellent bonding properties to many different substrates, e.g. metals, ceramics, wood, concrete, mortar. It is possible to formulate methanol-free formulations with a convenient reactivity.