Static field route #93

What do I do before putting mastic or tape on the joint?

Rectangular Duct Assembly: S-and-DrivePolished core starter — shop/detail check

Clean the surface and confirm the joint is mechanically seated first. Sealant sticks to clean metal; it does not fix loose, dirty, oily, or damaged fit-up.

Open in Field Rescue Open category

Field checklist

Confirm the joint is tight
Clean dirt/oil/water from the seal area
Use the approved seal method

Ask foreman

In Rectangular Duct Assembly: S-and-Drive, I’m looking at: What do I do before putting mastic or tape on the joint? What should I verify before I cut, drill, seal, cover, move, or install?

Do not

Do not seal over gaps, dirt, oil, water, or a loose joint.

Why it matters

Shop standard, project drawings/specs, duct pressure class, foreman direction, and approved connection detail.

Search words: clean before mastic, dirty metal, sealant, tape