Static field route #1032

I do not know whether to use mastic or tape on this joint

Sealing, Leakage, Mastic & Pressure TestingSTOP / VERIFY field starter

Do not choose by what is nearby. Verify the seal class, pressure class, system type, and approved material before sealing.

Open in Field Rescue Open category

Field checklist

Identify the duct/system and location.
Ask what seal class or approved sealing method applies.
Check whether the material is listed/approved for this use.
Use only the approved method after fit-up is clean and tight.
If you do not know what seal class means, ask before starting.

Ask foreman

What seal method applies here — mastic, listed tape, fabric-reinforced mastic, gasket, or something else?

Do not

Do not use random tape or mastic just because it is sitting nearby.

Why it matters

This is a field judgment moment. TinnerFlow helps you slow down, document, and ask clean; drawings, specs, manufacturer instructions, site rules, code/AHJ, and foreman direction still win.

Search words: mastic or tape seal class sealing method sealant tape first year sealing I do not know whether to use mastic or tape on this joint mastic or tape seal class sealing method sealant tape first year sealing Do not choose by what is nearby. Verify the seal class, pressure class, system type, and approved material before sealing. Sealing, Leakage, Mastic & Pressure Testing