High-Performance Primerless PUR Adhesives

30 years ago, we introduced our first innovative primerless to glass and paint systems at BMW and since that time, we’ve continued to advance the industry’s understanding of the bonding process and PUR chemistry. Today, we provide OEM and Tier customers with a variety of innovative high-performance solutions – including our Sikaflex® one-component polyurethane adhesives. These versatile adhesives are applied to a wide variety of substrates in direct glazing, mixed material bonding and trim part bonding applications.

Main Material Properties

  • Ultra-low to ultra-high shear modulus
  • Excellent resistance to stress delamination in a large range of climates
  • Primerless adhesion to paint and glass/ceramic frits on a broad variety of substrates
  • Accelerated one-component PUR systems – in combination with Sika®Booster


  • Direct glazing
  • Mixed material bonding (CFRP, Aluminum, Steel, PC, PP)
  • Trim part bonding


  • Excellent non-read-through performance
  • Semi-structural assembly of mixed materials
  • Cost reductions created through the use of primerless direct glazing systems
  • Stable mechanical properties over service temperature range (i-cure)