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.

