TinnerFlow logoTinnerFlow™
Static field route #302

What do I do when not sealing corners of TDC/Ductmate joint?

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

Treat TDC/Ductmate corners as leak-prone points. Check the corner clip, gasket, and seal path before calling the joint done.

Open in Field RescueOpen category

Field checklist

Ask foreman

Do you want me to check and seal the TDC/Ductmate corners before this gets covered?

Do not

Do not assume the flange is sealed just because the straight runs look good.

Why it matters

Flange corners are common leak paths and are easy to miss once the duct is above ceiling.

Search words: seal leakage pressure test flange leakage