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DOWSIL Primer-C OS is a primer for silicone adhesives and sealants offering a low VOC and unique fluorescing feature, allowing for a visual quality control check to ensure primer has been applied.


Product Data Sheet



  • 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.

Features & Benefits

  • 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

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