Silicone/Urethane Hybrids

Silicone/Urethane Hybrids

Silyl Terminated Polyurethanes (STPU)silicone hybrid molecule 


  • Broad use in construction, institutional, industrial, DIY, automotive, marine and transportation markets (not recommended for structural sealant glazing applications)


  • No CO2 evolution associated with single component urethane.  Less incidents of swelling or bubbling in joints where moisture is present.
  • No isocyanate content
  • Excellent adhesion and movement capabilities
  • Good UV and heat stability
  •  Paintable
  • Exceptional bonding to most construction substrates including plastics, metals, wood and stone
  • Can exceed ± 50% joint movement capability (ASTM C 920) even in low temperatures
  • Contain little to no solvent; contribute to less VOC; yield very low to no odors compared to other chemistries


  • Not recommended for structural sealant glazing applications

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