Our lap caulk is used when applying splice and/ or bonding adhesives where roofing membrane is overlapped. It prevents initial moisture infiltration before the adhesives are set.
Our lap caulk is available in 10.5 oz tubes in both black or white for use in single ply membrane applications such as EPDM or TPO. Product should not be screed or smoothed after application. This caulk is meant to prevent water infiltration into seams and overlaps prior to the adhesive setting up. Usually 24-48 hours depending on temperature and humidity.
Standard caulk gun required for application. Once plastic top is cut you must puncture the tube through the plastic top with a screw driver or long screw or nail to begin application. Do not screed or smooth caulk once applied. All seams that were glued or installed should be caulked at the end of each day.