Sealing, Leakage & Mastic
Mastic, mesh tape, leaks, gasket problems, pressure-test failures, sealant mistakes, and duct leakage fixes.
Sealing, Leakage & Mastic questions
What's the difference between water-based mastic and solvent-based duct sealant?1st Year · Check firstHow do I apply fiberglass mesh tape with mastic without it wrinkling?1st Year · Check firstHow do I apply water-based mastic when it's freezing cold on the jobsite?1st Year · Check firstWhat's the clean-up procedure for getting mastic off my tools (and hands)?1st Year · Check firstHow do I safely rig ductwork while standing on a leading edge (harnessed in)?3rd Year · Stop / VerifyWhat is the maximum allowable leakage rate for Class A duct sealing?4th Year · Stop / VerifyWhat does it mean when a duct seam pops during pressure testing?3rd Year · Check firstCan a torn Vanstone flare be sealed with mastic?3rd Year · Check firstWhy is duct mastic peeling off oily or wet metal?1st Year · Standard CorrectionWhy does a volume damper leak when it is bolted metal-to-metal into a sleeve?2nd Year · Standard CorrectionWhy is air leaking from the spiral lockseam during a pressure test?3rd Year · Check firstWhy is stretching butyl gasket tape a bad idea?1st Year · Check firstWhy does caking mastic on too thick not make a better seal?1st Year · Field ReferenceWhy should metal be wiped clean before applying mastic?1st Year · Field ReferenceHow do I avoid the exploding polyurethane mastic bucket base?1st Year · Field Reference
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