Sikaflex primers are special materials formulated to improve the bond of Sikaflex urethane sealants when applied to specific substrates.
Sikaflex® Primer-260 promotes adhesion of urethane sealants to various metallic, non-metallic, and plastic substrates.
available in pints, 6/carton.
Clear
6 months in original, unopened containers.
Sikaflex® Primer-260 shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +40°F and +95°F (+4°C and +35°C).
Following are average coverages, depending on porosity of substrate:
Sikaflex Primer 260 Coverage per pint (Liner ft. 1/2” x 1/2” joint):
300-500 Linear ft.
Substrate | Primer Required | Recommended Primer |
Marble | No | 260 |
Siliconized Polyester | Yes | 260 |
Alucobond | Yes | 260 |
| Lexan | Yes | 260 |
| Teflon | No Bond Achieved | |
| Polyethylene | No Bond Achieved | |
| Polypropylene | No Bond Achieved | |
| Glass - Sheet, float or plate | No | 260 |
| Porcelain | No | 260 |
| Ceramic tile | No | 260 |
| Aluminum - Anodized | No | 260 |
| Aluminum - Mill Finish | Yes | 260 |
| Lead | No | 260 |
| Copper (bright/clean) | No | 260 |
| Brass | No | 260 |
| Zinc | No | 260 |
| Tinplate | No | 260 |
| Steel (Bright/Clean) | No | 260 |
| Steel - Stainless | Yes | 260 |
| Steel - Galvanized | Yes | 260 |
The key to good bonding with Sikaflex sealants/primers is surface preparation. Specifically, all surfaces must be dry and free of dirt, grease, mold release agents, loose mortar, laitance, and any foreign matter. If the joint contains old sealant, it and all extraneous material must be removed and the substrate cleaned by mechanical means. Apply primers at substrate temperatures of 40°F and rising. Surface must be frost free.
