Master Flow® Duct Mastic/Sealant About
Master Flow® Duct Mastic/Sealant Specs
Master Flow® Duct Mastic/Sealant Docs
Master Flow® Duct Mastic/Sealant Videos
Where to buy
Find a GAF distributor near you.
Get automatic Lifetime Protection on your entire GAF roofing system
When you install any GAF Lifetime Shingle and at least 3 qualifying GAF accessories, you'll automatically get a Lifetime limited warranty on your shingles and all qualifying GAF accessories*.