Static field route #304

What do I do when gaps left at S-and-drive corners?

Sealing, Leakage, Mastic & Pressure Testing.1 field-polished — seal/test detail check

S-and-drive corners need attention before you seal. A gap at the corner is usually a fit-up problem first, not a “more mastic” problem.

Field checklist

This S-and-drive corner still has a gap. Do you want me to fix the fit-up before sealing it?

Do not bury a bad S-and-drive corner under a pile of mastic.

Bad mechanical fit can open later and leak even if it looked sealed at first.

Search words: seal leakage pressure test joint leakage