TL-0013 — Adhesion Compatibility of PERM-A-BARRIER® VPL/VPL LT 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 PERM-A-BARRIER® VPL/VPL LT. PERM-A-BARRIER® VPL/VPL LT 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.
|Material1||Over PERM-A-BARRIER® VPL/VPL LT||Under PERM-A-BARRIER® VPL/VPL LT2|
|1 pt. PU||X||X|
|Acrylic + Silicone||✔||✔✔✔|
|2 Pt. PU||✔||✔|
✔✔✔ Excellent Adhesion (5+ lbs/in.) ✔✔ Good Adhesion (2-5 lbs/in.)
✔ Moderate Adhesion (1-2 lbs/in.) X Low Adhesion (Below 1 lbs/in.)
- Adhesion results with individual caulks and sealants may vary. It is recommended that particular products be pre-tested prior to full application.
- The materials tested under PERM-A-BARRIER® VPL/VPL LT were allowed to cure in accordance with their manufacturer’s recommendations prior to application of PERM-A-BARRIER® VPL.
- GCP Applied Technologies has tested the above materials for adhesive and chemical compatibility. GCP can not, however, guarantee the in-place performance of an other Manufacturer.
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Last Updated: 2022-11-24