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. | North America Customer Service: +1 (877) 423 6491

GCP Applied Technologies Inc., 2325 Lakeview Parkway, Suite 450, Alpharetta, GA 30009, USA
GCP Canada, Inc., 294 Clements Road, West, Ajax, Ontario, Canada L1S 3C6
This document is only current as of the last updated date stated below and is valid only for use in the United States. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.

Last Updated: 2023-02-14