Static field route #584

What do I do if the joint is dusty, oily, or wet before sealing?

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

Clean and dry the surface before sealing. Sealant, tape, and mastic fail when they are applied over oil, dust, shavings, or moisture.

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 if the joint is dusty, oily, or wet before sealing? 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: dirty joint, mastic prep, clean surface