Epoxy Adhesive EC-3333 B/A

Technical Datasheet

Adhesive Application

A. Adhesive Mixing

3M™ Scotch-Weld™ Epoxy Adhesive EC-3333 B/A is supplied in dual plastic

cartridges. To use, insert the dual syringe cartridge into an applicator and advance

the plungers into the cylinders using light pressure on the trigger. Next remove the

cap from the cartridge and expel a small amount of adhesive to be sure both sides

of the cartridge are flowing evenly and freely. If automatic mixing of Part A and

Part B is desired, attach a 6 inch or longer mixing nozzle to the cartridge and

dispense the adhesive. If mixing a nozzle is not used, dispense both components

into a container and thoroughly mix with a spatula until a uniform gray color is

achieved.

Scotch-Weld EC-3333 B/A Adhesive is also available in kit form consisting of

Part B (Base) and Part A (Accelerator). To use, measure 2 parts of base to 1 part

of accelerator by volume (or 100 parts to 49 parts by weight). Mix thoroughly

with spatula until it is a uniform gray color.

IMPORTANT: Be careful when mixing quantities larger than 50 grams (2 oz.)

because an exothermic reaction may occur.

Apply adhesive to parts to bonded and assemble bonds before the work life

expires parts must be clamped or held together until cured.

B. Work Life

The work life of a 20 gram batch is over 20 minutes at 70-75°F. Larger quantities

and/or higher temperatures will result in shorter work lives.

C. Curing Characteristics

The data reported in the Typical Product Performance section (on page 3) were

developed using a cure of 5 to 7 days at 70-80°F and 2 psi bonding pressure. At

70-80°F, bonds of Scotch-Weld EC-3333 B/A Adhesive generally reach handling

strength in 2 to 3 hours. Full cure is reached in 7 days. If faster cures are desired,

bonds may be heated. At 120°F, full cure is reached in approximately 2 hours.

D. Cleanup

Excess filler and equipment may be cleaned prior to curing with toluene or

Ketone solvents.*

*When using solvents, extinguish all ignition sources in the area, observe

precautionary measures as well as all appropriate government and industry

regulations.

Storage Stability

The standard shelf life for Scotch-Weld EC-3333 B/A Adhesive is 12 months

from the date of shipment, when stored indoors in a dry place at 80°F or less in

the original container.

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