Wrong tape/sealant for system
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.
Stop if For this joint, are we using mastic, UL-rated tape, fabric-reinforced mastic, or another approved seal method? Watch out Do not use random duct tape, old tape, or a product just because it looks close. Check 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. Steps 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. Say this to your foreman For this joint, are we using mastic, UL-rated tape, fabric-reinforced mastic, or another approved seal method?
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