Sealant Cure Time Before Pressure Test
Sealant and mastic need time to skin/cure before pressure testing or covering, especially when applied thick or in cold/wet conditions.
What This Helps With
Sealant and mastic need time to skin/cure before pressure testing or covering, especially when applied thick or in cold/wet conditions.
Apprentice words: mastic cure time, duct sealant dry time, pressure test too soon, wet mastic
Common problem: Testing too soon after mastic and blowing wet sealant out of the joint.
Check First
What Not To Do
Do not pressure test wet sealant. Do not bury uncured mastic under insulation without checking cure conditions. Do not assume every bucket cures the same.
What can go wrong: Testing too soon after mastic and blowing wet sealant out of the joint.
Better Foreman Question
How long does this sealant need before pressure test or insulation, given today’s temperature and thickness?
Verify With
Source to verify: Sealant manufacturer data sheet, project spec
Safe wording: Cure time is product-specific and weather/temperature dependent.