DOWSIL™ 1203 3in1 Primer is a professional UV-traceable cleaner and primer for silicone adhesives and sealants. It is designed to improve adhesion and accelerate adhesion build-up of silicone sealants on various substrates. The product combines cleaning and priming in one material. In case of very dirty surfaces, additional cleaning with a suitable cleaning solvent may be required. The UV tracer allows verification of correct primer application using a UV lamp.

Main information:

Manufacturer: DOW / DOWSIL™
Product type: UV-traceable cleaner and primer for silicone sealants
Application: adhesion improvement and substrate cleaning / priming
Use area: weathersealing / structural glazing
Colour: colourless
Documents: TDS / SDS

Key benefits

  • Improves adhesion of silicone sealants to many substrates
  • Provides more uniform and stronger bonds
  • Combines cleaning and priming in one material
  • Contains UV tracer for application control
  • Supports faster adhesion build-up
  • Suitable for weathersealing and structural glazing applications

Applications

  • Primer for silicone adhesives and sealants
  • Cleaning and priming of joint surfaces
  • Weathersealing applications
  • Structural glazing applications
  • Professional production and installation processes

Note: very dirty surfaces may require additional cleaning with a suitable cleaning solvent.

Technical information

Colour: colourless
Viscosity at 23 °C: 1 mPa·s
Flash point: 12 °C
Specific gravity at 23 °C: 0.80
Usable life: 18 months
Packaging: standard industrial container sizes

Important to know

Before use, read the SDS, product label and manufacturer’s recommendations.

Need a cleaner and primer for silicone sealant adhesion?

Glasspro represents DOW and can help select the right surface preparation solution for weathersealing, façade and structural glazing systems.

📩 Inquiry
For pricing, product availability, technical documentation and B2B supply options in your market, please contact us.

📄 Technical documentation
Download the product TDS / PDF for detailed technical information.