DOWSIL™ 1203 3in1 Primer is a professional UV-traceable cleaner and primer designed to improve adhesion of silicone adhesives and sealants to various substrates.

The product combines cleaning and priming functions in one material. The UV tracer allows verification of primer coverage using a UV lamp, helping control surface preparation before silicone adhesive or sealant application.

Technical information

Product: DOWSIL™ 1203 3in1 Primer
Type: UV-traceable cleaner and primer for silicone adhesives and sealants
Application: adhesion improvement and surface cleaning / priming
Use areas: weathersealing, façade and structural glazing applications
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

DOWSIL™ 1203 3in1 Primer is used as a surface preparation solution before silicone adhesive and sealant application where reliable adhesion and primer coverage control are important.

Very dirty surfaces may require additional cleaning with a suitable cleaning solvent before using DOWSIL™ 1203 3in1 Primer. Before use, always review the SDS, product label and manufacturer’s recommendations.

Need a surface preparation solution before silicone adhesives or sealants?

Glasspro represents the DOW product portfolio and can help select the right cleaner, primer or combined surface preparation solution according to the substrate, silicone adhesive / sealant and project conditions.

📄 Technical documentation
Download the product TDS / SDS documents for technical and safety information.

📩 Inquiry
For pricing, product availability, packaging, technical documentation and B2B supply across the EU and other export markets, please contact us.