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Primers, Brushes & Dabbers, Structural Glazing, Primers, Brushes & Dabbers, Structural Glazing

Dowsil Primer C (OS) is a solvent-based silane adhesion promoter for use in construction applications for plastic and painted surfaces.


  • Improves adhesion of silicone sealants to many substrates
  • Accelerates adhesion build of 2 part structural sealants
  • Fluoresces under a 365 nm wavelength light so that a visual check can confirm presence of primer
  • Conforms to South Coast and Bay Air Quality Management District Regulations for Architectural Sealant Primers
  • Low VOC at 49 g/l as a low solids sealant primer
  • User friendly with low VOC
  • Improves quality control processes by offering a visual confirmation of primer presence
  • Quick cure time
  • Non staining
  • Improves sealant adhesion to plastics


  • Accelerated adhesion of DOWSIL 983 Structural Glazing Sealant to coated aluminum substrates such as polyvinylidene fluoride (PVDF) or Kynar based paints
  • For in shop or field use with DOWSIL construction sealants, both 1 and 2 part
  • Accelerated adhesion to polyester powder paints (powdercoats)
  • Primer for plastics


  • Please contact Glasscorp Ltd for specific advice on the primer required before proceeding
  • Please follow the solvent manufacturers safe handling recommendations and national regulations regarding solvent usage and storage
  • Customers should independently determine the suitability of this product for their specific purpose prior to use


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