3M 3901

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Description for 3M 3901

A primer for film and liquid adhesives for improved metal and glass adhesion or improved resistance to environmental exposure with epoxy and urethane adhesives. Protects cleaned surfaces until bonding can be completed. Imparts improved corrosion protection to metal.

*See Terms of Use Below

Application Type	Prime
1 Part or 2 Part	1 Part
Material Form	Liquid
Substrate	Glass, Metal
Manufacturer	3M
Chemistry	Methyl alcohol
Cure Method	Air dry, Solvent
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

Best Practices for 3M 3901

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Technical Data for 3M 3901

*See Terms of Use Below

Overview

Application Type
- Primer - Prime
1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
Material Form
- Liquid
Substrate
- Glass
- Metal
Industry
- Other - for Scotch-Weld film and liquid adhesives
Chemistry
- Solvent-Based - Methyl alcohol
Application Method
- Brush - Brushing
- Spray - Spraying
Cure Method
- Room Temperature / Air Dry - Air dry
- Solvent
Color
- Red
Can Be Used In Conjunction With These Materials
- Epoxies - Epoxy
- Urethanes - Urethane

Specifications

Cure Specs

Viscosity (cPs)	3 to 7	Test Method

Bond Strength

Structural/Load-Bearing	Structural

Material Resistance

Environmental Resistance	Environmental resistance

Other Properties

Flash Point (°F)	60.8
Density (g/cm³)	6.3 to 6.7 (weight (lbs/gal))

Business Information

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

*See Terms of Use Below
1. Surface Preparation
  
  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.
2. Curing
  
  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.
3. Clean-Up
  
  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.
Comparable Materials for 3M 3901

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Spec Engine^® Results
- 459X(Parker Lord)
  This primer promotes adhesion to thermoplastic elastomers (TPE), polyolefins (TPO) and EPDM. This primer can be used in conjunction with Lord acrylic adhesives, urethanes adhesives, epoxy structural adhesives, and cyanoacrylate adhesives as well as with a variety of double-sided tapes.
- 459T(Parker Lord)
  Primer that promotes adhesion to thermoplastic elastomers, polyolefins, and EPDM.
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Closest Results from this Manufacturer
- Scotch-Weld Instant Surface Activator(3M)
  Liquid chemical products used in conjunction with 3M™ Scotch-Weld™ Instant Adhesives.
- Compare All