POLYURETHANE SEALANT
1-COMPONENT POLYURETHANE SEALANT
What is it?
1-component polyurethane sealant product range consists of prepolymer-based flexible adhesives and sealants that cure on exposure to atmospheric moisture to form a durable elastomer.
How is it used?
1-component polyurethane sealants are generally of stiff, paste-like consistency, with good non-sag properties. They are applied in bead form using a cartridge gun or pump operated application equipment; applied thicknesses range from 3 mm to 20 mm plus. Tack-free or skinning time varies between 10 minutes and one hour plus, depending on the product.
Four systems are available to meet different needs:
• Moisture-curing systems, with application and curing temperatures within the range 5–35ºC (ideally 15–25ºC)
• Hot-applied moisture-curing systems with high initial strength
• Hot-cure systems (100–160ºC) with high initial strength
• Booster systems, where a cure accelerator is added to the product via a static mixer, giving rapid strength development combined with a long open time.
Where is it used?
1-component polyurethane sealant is particularly suitable for use where materials with very different coefficients of thermal expansion are being bonded together, and where large dynamic stresses have to be absorbed. Typical applications include:
• Direct glazing in shipbuilding and vehicle assembly
• General bonding and sealing applications in shipbuilding and vehicle assembly
• Structural bonding in window assembly
• Bonding, sealing and structural strengthening of household appliances
In service:
– Extended service life thanks to damping of vibrations, uniform stress distribution and improved corrosion resistance
– Lower fuel costs thanks to reduced weight and improved aerodynamics resulting from greater design freedom
– Simpler repairs requiring less substrate preparation
– Lower cleaning costs thanks to smooth surfaces
Product Examples
For more information about our polyurethane sealant, please feel free to email or fax us.