PR-187 Adhesion Promoter
PPG PR-187 is an adhesion promoter that enhances the coupling of polythioether compounds to various substrates. It is recommended for use when applying PERMAPOL® P-3 and PERMAPOL® P-3.1e polythioether sealants over polysulfide materials. This one-part compound is suitable for application by brush or clean gauze and dries at room temperature in about 30 minutes.
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