TL-0024 — Adhesion Compatibility of PROCOR® Fluid Applied Waterproofing Membranes with Sealants and Caulks Technical Letter

Frequently, during the design or implementation of an assembly, the designer or contractor will need to select a sealant or caulk that is compatible with PROCOR® Fluid Applied Waterproofing Membranes. The information in the table below is intended to provide guidance when other materials will be in contact with PROCOR® and should not be substituted for any component of the PROCOR® Waterproofing System.

PROCOR® is chemically compatible with all of the following materials with the noted degree of adhesion. Other materials not listed may be compatible but were not tested.

Material Over PROCOR® Under PROCOR®
Procor® ✔ ✔ ✔ ✔ ✔ ✔
1 Pt. PU ✔ ✔ ✔ ✔ ✔
Acrylic Caulk ✔ ✔ ✔ ✔ ✔
Acrylic + Silicone ✔ ✔
2 Pt. PU ✔ ✔
Silicone Caulk x
Acrylic Sealer NA ✔ ✔ ✔

✔ ✔ ✔ Excellent Adhesion
✔ ✔ Good Adhesion
✔ Moderate Adhesion
X Low Adhesion

1GCP has tested the above materials for adhesion and chemical compatibility. GCP can not, however, guarantee the in-place performance of another manufacturer.

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Last Updated: 2024-06-21

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