3M 08681
Harmonization Code : 3208.20.90 | Paints and varnishes that are dispersed or dissolved in a non aqueous medium
Main features
- No-Activator One-Part Primer
- Ten-Minute Drying Time
- Multi-Interface Auto Glass Priming
Product Description
3M Single Step Primer 08681 is a black, one-part polyurethane primer for promoting 3M auto glass urethane adhesion to glass, primed pinchweld metal, PVC-encapsulated parts, and PAAS systems. The liquid primer requires no activator and dries for at least 10 minutes at 21 deg C and 50% RH. It also functions as a blackout primer for shielding urethane from ultraviolet exposure and as a touch-up coating for minor bare-metal pinchweld scratches. The product is an application-stage primer within the 3M glass urethane bonding system, not a stand-alone adhesive. The 08681 grade is supplied in a 125 mL aluminum bottle.
Key features
- One-part primer: The polyurethane primer requires no separate activator and is applied as a uniform coating.
- Ten-minute drying: The applied primer dries for at least 10 minutes at 21 deg C and 50% RH before urethane bonding.
- Multiple auto-glass interfaces: The primer is used on automotive glass, primed pinchweld metal, PVC encapsulation, and PAAS systems.
Applications
Applications include priming automotive glass before bonding with 3M auto glass urethane, coating minor bare-metal pinchweld scratches, priming PVC-encapsulated parts, and preparing PAAS windshield systems.
TDS, SDS & Technical Documents
Technical Specifications
No specifications available.
Additional Information
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Base | Polyurethane resins | - | Typical |
| Density | 1.0 | g/mL | Approximate |
| Color | Black | - | Typical |
| Viscosity | 50 | cP | Typical |
| Consistency | Liquid | - | Typical |
| Drying time | At least 10 | min | 21 deg C and 50% RH |
Final-state / after-processing properties
Qualification results apply to the auto-glass urethane bonding system for products 08681 and 08682.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Initial conditioning | Pass | - | 72 h at 22 deg C and 50% RH |
| Water immersion | Pass | - | 10-day qualification test |
| Heat aging | Pass | - | 14 days at 87.8 deg C |
| Humidity aging | Pass | - | 14 days at 37.8 deg C and 100% RH |
| QUV exposure | Pass | - | 2000 h qualification test |
