3M 1386

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.

See Vendor Technical Data Sheet for more info.

Application

Appropriate application equipment can enhance adhesive performance. The user is responsible for evaluating application equipment in light of the user’s particular purpose and method of application.

Scotch-Weld EC-1386 can be applied by a spatula, knife coat, notched trowel, or by extruding into places. Standard equipment is available which allows pumping directly from five-gallon pails. When extruded through a Pyles-Semco cartridge (3/32" orifice 70 psi line pressure), the delivery rate at 72°F (22°C) is approximately 20 grams/minute. A lower viscosity for ease of application can be obtained by warming Scotch-Weld EC-1386 to 100 - 120°F (38 - 49°C). Note: Scotch-Weld EC-1386 may start to thicken if held at 120°F (49°C) for more than 4 hours.

Curing

The pressure needed during the cure of Scotch-Weld EC-1386 is typically that required to keep parts in alignment and to overcome distortion and thermal expansion in the adherends.

The cure temperature may be varied from 330 to 500°F (166 to 260°C) depending on the materials being bonded, equipment available and bond properties desired. Scotch-Weld EC-1386 will wet the surface to which it has been applied. Heating at temperatures above 325°F (163°C) will chemically convert the adhesive into a high strength solvent-resistant bond.

Cure time depends on the cure temperature used, methods of heat application, production limitations and bond properties required. Since no two bonding operations are exactly alike, it is suggested that a few simple experiments be conducted, varying both temperature and cure time, to determine optimum conditions for the particular application. Figure 1 is a guide from which an approximate cure cycle can be taken for various cure times or temperatures.

Clean-Up

Excess adhesive and equipment may be cleaned up, prior to curing with Ketone type solvents.*

*Note: When using solvents extinguish all ignition source and follow manufacturer’s precautions and directions for use for handling such materials.