BR 441 Aliphatic urethane acrylate oligomer Bomar Specialties PU - Prepolymers >> Urethane acrylate PU - Prepolymers >> Polyester Difunctional aliphatic polyester urethane acrylate. An aliphatic with rapid cure speed as a standout characterisitc of this oligomer. It cures to a tough, hard, non-yellowing film with good adhesion to a variety of substrates. Provides oil and chemical resistance, weatherability, abrasion resistance, good adhesion and gloss. Difunctional aliphatic polyester urethane acrylate oligomer with rapid cure speed. Provides tough, hard, non-yellowing film. Provides oil and chemical resistance, weatherability, abrasion resistance, good adhesion and gloss.