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PPG Adhesion Promoters

PPG Adhesion Promoters explained.

Adhesion promoters are used to improve the results of bonding processes across a wide variety of substrates. These products vary in their chemical composition, with some working more effectively on certain substrates than others. These products can be used across a range of processes, including sealing, adhesive bonding and painting.

PPG provide a selection of adhesion promoters for use with their Aerospace Sealant range.

PR-142 is an adhesion promoter to enhance the coupling characteristics of polysulfide compounds to a wide variety of substrates. PR-142 is particularly well-suited for use with sealants on aircraft windshield applications where substrate crazing is an issue.

Chemistry – Silane

Approved by – GKN, Sierracin

PR-148 is an adhesion promoter to enhance the coupling characteristics of polysulfide compounds to a wide variety of substrates. PR-148 is a one-part compound suitable for application by brush or clean gauze. This product is also available in an AF (Aromatic Free) version.

Chemistry – Titanate

Approved by – BAE Systems, SAE (AMS), Lockheed

PR-182 is a water-based, VOC-compliant, adhesion promoter to enhance the coupling characteristics of polysulfide sealants to a wide variety of substrates. The material is specifically formulated as a safer alternate to organic solvent-based products, thus eliminating the flammability, explosion and health hazards associated with such materials.

Chemistry – Silane

Approved by – Boeing, Northrop Grumman, SAE (AMS)

PR-184 is an advanced one-part sealant adhesion promoter and surface cleaner for use on metals and solvent resistant coatings. PR-184 contains a non-toxic ester-based solvent blend, compounded with a surface activator agent and an indicator dye. PR-184 does not contain any aromatic or halogenated hydrocarbons.

Chemistry – Titanate

Approved by – Airbus S.A.S

PR-187 is an adhesion promoter to enhance the coupling characteristics of polythioether compounds to a wide variety of substrates. This adhesion promoter is recommended when a PR-1800 polythioether sealant is to be applied over a polysulfide material.

Chemistry – Amine

Approved by – Northrop Grumman

PR-188 is a sealant adhesion promoter that is suitable for use with both PRC® and Pro-Seal™ brand sealants. This product enhances the adhesion of both polysulfide, and Permapol® polythioether based sealants to standard aerospace substrates. This product is fully qualified to the AMS 3100 Class 2 specification. It has zero VOC's as currently defined by U.S. environmental regulations. PR-188 is a one-part compound suitable for application by brush or clean gauze. PR-188 is not appropriate for use on polycarbonate or acrylic substrates.

Chemistry – Amine

Approved by – Lockheed, SAE (AMS), Northrop Grumman

Adhesion promoters in use