3M

• Adhesion Promoter AP596 • All Purpose Primer P591 • Metal Primer P592

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Directions for Use

Surface Preparation:

Surfaces to be sealed or bonded should be clean and dry. Surfaces should be

free from grease, mold release, oil, water/condensation, and other contaminants

that may affect the adhesion of the sealant. Abrading with 180 to 220 grit

abrasive followed by a solvent wipe will improve the bond strength. Suitable

solvents include 3M™ Adhesive Remover, methyl ethyl ketone (MEK), isopropyl

alcohol (IPA) or acetone.*

*When using solvents, use in a well ventilated area. Extinguish all sources of

ignition in the work area and observe product directions for use and

precautionary measures.

Refer to product label and MSDS for further precautions. Always pre-test

solvent to ensure it is compatible with substrates.

Local and federal air quality regulations may regulate or prohibit the use of

these products or surface preparation and cleanup materials. Consult local

and federal air quality regulations before using these products.

Note: Alcohol will interfere with the curing process of polyurethane and

extra care must be taken when using alcohol as a cleaning solvent to

prevent any contact with the sealant.

Primer:

Use of a primer is an extra step and cost and will depend on substrates and the

final end use. Using primer can improve the corrosion resistance of certain metals

as well as improve the durability of the bond when exposed to high humidity

conditions.

For most applications, high strength bonds on metal can be achieved without

the use of a primer. Pre-testing for adhesion is suggested to determine if a

primer is needed.

Use of a 2-step surface preparation is recommended for certain substrates.

Surface prep consists of applying 3M™ Adhesion Promoter AP596 followed

by the appropriate 3M™ Primer to both bonding surfaces prior to using

adhesive sealant. In areas with VOC restrictions, it is imperative that bonding

surfaces are clean of contaminants. It may be acceptable to bond certain

substrates without primer if the bonding area is abraded with 3M™ Scotch-

Brite™ abrasive to improve adhesion. Contact 3M for technical support.

Do not apply 3M™ Adhesion Promoter and Primer on frozen nor wet surfaces.

Do not apply over silicone nor in the presence of curing silicone.

Application:

Supplies:

•

3M Adhesive Sealant in cartridges or 600 ml sausage packs

•

3M AP596 Adhesion Promoter

•

Appropriate 3M Primer matched to the substrate(s)

•

Soft lint-free cloths for 3M AP596 Adhesion Promoter and/or 3M

P591/P592 Primer application

•

Wool dauber(s) for 3M Primer application