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 fully qualified to the AMS 3100 Class 1 specification and PRC-DeSoto International specification test methods.
Immediately before applying adhesion promoter to primed substrates, the surfaces should be cleaned with solvents. Contaminants such as dirt, grease, and/or processing lubricants must be removed prior to sealant application.
A progressive cleaning procedure should be employed using appropriate solvents and a new lint-free cloth conforming to AMS 3819. (Reclaimed solvents or tissue paper should not be used.)
Always pour solvent on the cloth to avoid contaminating the solvent supply. Wash one small area at a time.
It is important that the surface is dried with a second clean cloth prior to the solvent evaporating to prevent the redeposition of contaminants on the substrate.