Description
POLAPRIME 7
High-Adhesion Polyurethane Primer. Bonds to Rubber, Plastics & Coated Surfaces.
POLAPRIME 7 is a solvent-based polyurethane primer engineered to deliver superior adhesion on difficult, low-energy substrates such as rubber, plastics, and previously coated surfaces. Designed for industrial maintenance and demanding service environments, it chemically interacts with the substrate to create a strong, durable bond for subsequent coating systems.
This high-performance primer penetrates and conditions impermeable surfaces, improving coating adhesion while sealing minor surface defects. It also enhances long-term system performance by protecting against corrosion, staining, and coating undercutting caused by environmental exposure.
Key Benefits
- Superior Adhesion on Difficult Surfaces
Chemically bonds to rubber, plastics, and painted substrates. - Penetration of Impermeable Surfaces
Enhances adhesion where traditional primers and coatings may fail. - Crack & Void Sealing
Bridges hairline fractures and seals pinholes to create a continuous protective barrier. - Corrosion Protection
Helps prevent rust formation and undercutting caused by corrosive creep. - Rust Conversion Capability
Chemically converts Type II rust to stabilize and protect metal substrates. - Optimized Application Properties
Formulated for smooth coverage, easy application, and consistent field performance. - Fire-Retardant Film
Provides added safety and flame resistance once fully cured. - Stain Blocking
Prevents substrate staining and discoloration from migrating into finish coats. - Encapsulation of Existing Coatings
Bonds to and seals well-adhered remnants of existing coating systems. - Industrial-Grade Performance
Engineered to perform reliably in harsh industrial and operating environments.
Recommended Substrates
Suitable for application over:
- EPDM, TPO, and PVC
- Synthetic Rubbers and Plastics
- Concrete and Fiberglass Composites
- Most Metals
- Insulation Systems
- Porous and Non-Porous Stone
- Asphalt and Coal Tar BUR
- Modified Bitumen and Capsheet
- Previously Coated Surfaces
- Other properly prepared substrates
Coverage
- Approximately 200 sq ft per gallon
(Coverage may vary depending on substrate condition and porosity.)
Container sizes
1 gallon, 5 gallon
Preparation and Application
Surface Preparation
Surfaces must be free of dirt, loose debris, oil, grease, or other substances that would interfere with bond. It is advisable to have the surface as dry as possible. All repairs of damage or defects must be made prior to coating.
Application
Stir thoroughly for 3 minutes, then keep the can covered whenever possible to prevent contaminating the primer.
Apply by spray, roller, or brush. Roller and brush techniques provide best penetration and performance results. For roller application, use a medium or short nap roller. For brush application, use a natural bristle brush. Apply enough POLAPRIME 7 only to cover the surface. It is not advisable to pour POLAPRIME 7 straight onto the surface. Apply the appropriate surface coating as soon as possible after thorough drying to prevent contamination of the surface, ideally within 36 hours. If the POLAPRIME 7 has been left exposed for more than 48 hours, the surface must be cleaned thoroughly to remove all dirt and contaminants.
POLAPRIME 7 may be used at temperatures as low as 20°F; however, the surface must be dry and at least 5° above dew point. Drying time may be accelerated with the use of Andek Accelerator at one unit per 5-gallon pail.
Spray Application
Utilize a 30:1 airless pump, a 3/8″ hose and a 37 width tip
Clean up
Tools and equipment may be cleaned with Toluene, Xylene, or any high aromatic solvent suitable for polyurethanes
Limitations
Do not apply POLAPRIME 7 if the temperature is predicted to drop below 20°F within 2 hours of completion of application. Do not apply any of the POLAPRIME 7 to saturated surfaces or substrates that have ice crystals entrapped. Do not apply if rain is forecast within 4 hours of completion of application. Use EP rated spray equipment.
Read the container label warning and Safety Data Sheet (SDS) for important health and safety information prior to the use of this product.
KEEP AWAY FROM CHILDREN AND PETS
For additional information, contact the Andek Technical Department
Technical Data
| VOC | 200 gms/liter | |
| Viscosity (cps) | 3000 | ASTM D-2196 |
| Pounds per Gallon | 9.8 | ASTM D-1475 |
| Flashpoint | 105°F | ASTM D-3278 |
| Solids Content | 80% B.W.; 82% B.V. | ASTM D-2369 |
| Adhesion To PVC |
100 psi | ASTM D-5179 |
| Adhesion To A.B.S. | 500 psi | ASTM D-5179 |
| Drying Time (70°F, 70% R.H.) |
12 hours (normal) | ASTM D-1640 |
| Drying Time (70°F, 70% R.H.) |
2 hours (accelerated) | ASTM D-1640 |
| Hardness | 1 H | ASTM D-3363 |
| Wet Film Thickness | 8 mils | ASTM D-1212 |
| Dry Film Thickness | 7 mils | ASTM D-1005 |
| Water Vapor Transmission | 3.5 perms | ASTM D-1653 |
| Solvent Resistance | 100 M.E.K. Double Rubs | ASTM D-5402 |