An Easy Do-It-Yourself Home Improvement Project
The Correct Way to Seal Duct Collars with Mastic
Step 1
Apply mastic approximately 2” wide uniformly around the collar of the metal fifing. Reference the data on mastic container for application rate, application thickness, cure times and handling information.
Step 2
Slide at least 2” of duct core over the filling or sleeve ends and past the bead.
Step 3
Secure core to collar with a clamp or tie wrap applied past the bead.
Step 4
Pull jacket and insulation back over core ends. Tape jacket(s) with at least 2 wraps of UL rated duct tape or a tie wrap.
Step 1-Cover duct collar with mastic
Step 2-fit duct over duct collar
Step 3-Secure with ties or metal stra
Step 4-Slide insulation tight and wrap with duct tape
{ 2 comments… read them below or add one }
Couldnt agree more with that, very attractive article
Thanks for the post, keep posting stuff