TinnerFlow™2nd YearYELLOW · Check FirstSpiral Cutting / Lockseam
Once the lockseam unzips, that damaged area is not a normal sealant fix. Cut back to sound pipe and lock the seam end before installing.
A recip saw or rough cut can grab the spiral lock and start unzipping it like a ribbon. When that happens, the pipe loses the structural lock that makes it round and strong.
Trim past the damaged area with a cleaner cutting method, stabilize the remaining seam end with approved fastener/rivet direction, and replace the section if the seam damage continues into the usable length.
Do not install unraveling spiral pipe and try to hide it with sealant.
An opened spiral seam can leak, lose shape, and fail under pressure or vibration.
Final direction belongs to the foreman, approved drawings/specs, manufacturer instructions, pressure/material schedule, employer policy, and AHJ/code requirements.