Application Type Prime 1 Part or 2 Part 1 Part Material Form Liquid Substrate Glass, Metal Manufacturer 3M Chemistry Methyl alcohol Cure Method Solvent, Air dry Viscosity (cPs) 3 to 7 Color Red Density (g/cm³) 6.3 to 6.7 (weight (lbs/gal)) Can Be Used In Conjunction With These Materials Epoxy, Urethane
Technical Data for 3M 3901
- Primer - Prime
1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
- Other - for Scotch-Weld film and liquid adhesives
- Solvent-Based - Methyl alcohol
- Brush - Brushing
- Spray - Spraying
- Room Temperature / Air Dry - Air dry
Can Be Used In Conjunction With These Materials
- Epoxies - Epoxy
- Urethanes - Urethane
Viscosity (cPs) 3 to 7 Test Method
Environmental Resistance Environmental resistance
Flash Point (°F) 60.8 Density (g/cm³) 6.3 to 6.7 (weight (lbs/gal))
Shelf Life Details Storage: Store product at 60-80°F (16-27°C) for maximum storage life. Higher temperatures reduce normal storage life.;Shelf life: This product has a shelf life of 15 months from the date of shipment when stored in the unopened original container at room temperature. Shelf Life Temperature (°F) 77 Shelf Life Type From Date of shipment Shelf Life (mon) 15
Best Practices for 3M 3901
A thoroughly cleaned, dry, grease-free surface is essential for maximum performance. Cleaning methods which will produce a break-free water film on metal surfaces are generally satisfactory. Surface preparations should be fully evaluated with the adhesive, especially if resistance to specific environments are anticipated.
Air dry cycles for periods as short as 1/2 hour have been used successfully with the force dry cycle. Humidity contributes greatly to satisfactory use of this primer. Relative humidity of 25% or lower may cause difficulties and should be thoroughly evaluated in the customer’s application.
The primed surface, after cooling to ambient temperatures, is ready for adhesive bonding.
Excess primer and equipment may be cleaned up with ketone-type solvents. *
*Note: When using solvents, extinguish all ignition sources, and follow the manufacturer’s precautions and directions for use.
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