PPG PR-188 AMS3100 Class 2 Type 2 Universal Sealant Adhesion Promoter – 16 oz

PPG PR-188 is a universal adhesion promoter meeting AMS3100 Class 2, Type 2 specification, engineered for maximum compatibility across the widest range of aircraft substrates including metals, composites, plastics, and glass. Its universal formula makes it the go-to adhesion promoter for complex aircraft sealing applications where multiple substrate types must be primed within a single joint or assembly area.

Unlike substrate-specific adhesion promoters, PR-188’s advanced chemistry is formulated to provide strong adhesion promotion simultaneously on aluminum alloys, titanium, steel, carbon fiber composites, fiberglass, and thermoplastic materials. This versatility simplifies inventory management and reduces the risk of applying the wrong promoter to a specific substrate type during complex MRO operations.

Supplied in a 16 oz plastic bottle, PR-188 is suitable for production environments and field MRO applications. Its AMS3100 Class 2 Type 2 qualification ensures it meets aerospace specification requirements for universal sealant adhesion promotion across the full range of qualified sealant and substrate combinations.

Product Specifications

Technical Information

PPG PR-188 achieves its universal substrate compatibility through a multi-functional silane-based coupling agent system that contains reactive groups optimized for bonding to both inorganic substrate surfaces (metals, glass) and organic polymer surfaces (composites, plastics). This dual reactivity enables a single promoter formulation to deliver effective adhesion improvement across the diverse material mix found in modern aircraft structures.

The AMS3100 Class 2 Type 2 designation indicates PR-188 has been tested and qualified for use with a broad spectrum of aerospace sealant types, providing greater application flexibility than Class 1 products. Its performance has been validated through rigorous testing including fuel immersion, hydraulic fluid exposure, thermal cycling, and mechanical peel and lap shear testing per AMS3100 requirements.

PR-188 should be applied to thoroughly cleaned and prepared surfaces and allowed to flash off completely per the PPG technical data sheet before sealant application. The plastic bottle format is compatible with standard brush and wipe application equipment and is resistant to solvent attack from the promoter formulation.

Why Choose PPG PR-188 Universal Adhesion Promoter?

• ✅ AMS3100 Class 2 Type 2 Qualified — Meets top aerospace adhesion promoter standard
• ✅ Universal Multi-Substrate Formula — Metal, composite, plastic, glass in one product
• ✅ Simplifies Inventory — One promoter for multiple substrate types
• ✅ 16 oz Production Size — Efficient for MRO and OEM production use
• ✅ Plastic Bottle Safety — Reduced breakage risk vs glass containers

Frequently Asked Questions

Q: What makes PR-188 ‘universal’?
A: PR-188 is formulated with multi-functional coupling agents that bond effectively to metal, composite, plastic, and glass substrates — unlike substrate-specific promoters that work optimally on only one material type.

Q: What is the MPN for PPG PR-188 16 oz?
A: MPN is 0188XXXAM416PT. Spec: AMS3100 Class 2 Type 2.