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

*See Terms of Use Below

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.
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.
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.

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Technical Data

Overview

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Specifications

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Best Practices

*See Terms of Use Below
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Comparable Materials

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