Static field route #303

What do I do when using wrong tape/sealant for system?

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

Do not choose mastic or tape by what is nearby. The approved sealing method comes from the project spec, shop standard, manufacturer instructions, or foreman direction.

Open in Field Rescue Open category

Field checklist

Identify the duct/system you are sealing.
Ask what seal method applies: mastic, listed tape, gasket, fabric-reinforced seal, or other approved method.
Check whether the work is low pressure, high pressure, flex, grease, smoke/rated, or special system.
Use only approved material.
Save the container/label if the foreman needs to verify it.

Ask foreman

For this joint, are we using mastic, UL-rated tape, fabric-reinforced mastic, or another approved seal method?

Do not

Do not use random duct tape, old tape, or a product just because it looks close.

Why it matters

Different systems and specs can require different seal classes/materials. Wrong material can fail inspection or leakage testing.

Search words: seal leakage pressure test material