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Sealing Air Ducts with mastic

Zach's picture

I want to seal the metal air ducts in my crawl space with mastic. Can I run my A/C right after I've applied the mastic?  It's summer in North Carolina and I'm not sure how long I can go without running the A/C.

I'd let it dry for at least 4 (post #213342, reply #1 of 1)

I'd let it dry for at least 4 hours before running the AC.

Florida Licensed Building Contractor, 45 years experience in commercial remodeling, new homes, home remodeling and repairs and all types building maintenance.