Nitrile High Performance Rubber & Gasket Adhesive

847 • 847H

Handling/Application

Information

Directions for Use:

1. Surface Preparation: Remove all dust, dirt, oil, grease, wax, loose paint, etc.

Wiping with a solvent such as methyl ethyl ketone (MEK) or 3M™ Citrus Base

Cleaner will aid in preparing the surface for bonding.*

2. Application Temperature: For best results the temperature of the adhesive and

surfaces to be bonded should be at least 65°F (18°C).

3. Application: Stir well before using

Porous Surface(s): Brush, flow or spray a thin, even coat of adhesive to one or

both surfaces. Coating both surfaces is preferred since it gives greater strength and

permits longer open time before bonding. Very absorbent materials may require

more than one coat. Bond while adhesive is still wet or aggressively tacky. Join

surfaces with firm pressure.

Non-Porous Surfaces: Brush, flow or spray a thin, even coat of adhesive to both

surfaces. Allow adhesive to dry until tacky. Join surfaces with firm pressure.

4. Drying Time: Drying time depends on temperature, humidity, air movement, and

porosity of the materials bonded. Greater immediate strength may be obtained by

heat or solvent reactivation. See Reactivation below.

5. Reactivation: To solvent reactivate, coat both surfaces with adhesive. Allow to

dry tack-free. Lightly wipe one surface with a solvent such as methyl ethyl ketone

(MEK)*

. Complete bond within 30 seconds.

To heat activate, coat both surfaces with adhesive. Allow adhesive to dry

completely. Reactivate by heating one or both surfaces to a minimum of 180°F

(82°C). Assemble immediately (while hot), using firm pressure to ensure contact.

6. Curing: 3M™ Nitrile High Performance Rubber & Gasket Adhesives 847

and 847H may be heat cured to obtain improved physical properties. Cure

assembled parts at time and temperature listed using 100 psi pressure on the

bond line.

Temperature of Bondline

Time for Minimum Cure

200°F (93°C)

120 minutes

240°F (115°C)

40 minutes

280°F (138°C)

12 minutes

320°F (160°C)

8 minutes

360°F (182°C)

5 minutes

400°F (204°C)

2 minutes

7. Cleanup: Excess adhesive may be removed with a solvent such as methyl ethyl

ketone (MEK) or acetone, preferably while adhesive is still wet.*

*When using solvents, extinguish all ignition sources, including pilot lights, and

follow the manufacturer’s precautions and directions for use.

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