3M 3901

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.