ASTRA PA®
Adhesion Promoters
Specialized additives to enhance adhesion strength between surfaces (metals, plastics, glass, composites). Modify surface, improve wettability and chemical compatibility.
Why use adhesion promoters?
Adhesion promoters enhance the bond between coatings and difficult substrates: plastics, metals, glass, composites. They modify surface energy and create chemical bridges for lasting adhesion.
Key Benefits
- Stronger bond to difficult substrates
- Works on plastics, metals, glass, composites
- Improved water and humidity resistance
- Better salt spray performance
- Reduced delamination risk
- Available for solvent and waterborne systems
Impact on Coating Performance
ASTRA PA adhesion promoters solve the most challenging substrate adhesion problems. Essential for coatings on polypropylene, stainless steel, glass and other low-energy surfaces.
P – organosoluble, WB – water-based, RC – radiation-curable
Product Catalog
Download TDS| Active % | Feature | TDS | Samples | |||
|---|---|---|---|---|---|---|
| ASTRA PA-608 | Elementis-1121 | Solvent-based | 50% | Contains amino groups, designed for inorganic substrates for processing fillers. Can participate in cross-linking. Suitable for EP, PU systems. | ||
| ASTRA PA-708 | — | Solvent-based | 100% | Contains anchor groups that are excellently adsorbed on various hard-to-wet surfaces (stainless steel, nylon). Improves resistance to salt fog, moisture resistance, and adhesion to glass. | ||
| ASTRA PA-808 | KBM-403 | Solvent-based | 100% | Epoxysilane, improves adhesion to inorganic substrates. Can also increase the mechanical strength of the coating. |
Articles about ASTRA PA®
Switching Coating Additive Suppliers: A Practical Migration Guide
A structured process for evaluating and switching to alternative coating additive suppliers.
ReadAdhesion Promoters for Coatings: When and How to Use Them
Practical guide to adhesion promoters for metal, plastic and difficult coating substrates.
ReadNeed technical assistance?
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