Sheet metal & Air Conditioning Contractors’ National Association


Mestek Machinery – Engel 800P Rollformer

Feb 23, 2018

Mestek Machinery’s Hot Melt Sealant System is a sealing system for transverse duct seams that works by heating a temperature-activated sealant and inserting it into the Pittsburgh lock roll former so that it produces an airtight Pittsburgh seam. It can be used on a stand-alone machine or on a coil line to adhere to SMACNA duct construction standards.

The Hot Melt Sealant System is a perfect accessory to our Engel 800P. While the Pittsburgh lock is being roll-formed, the sealant is injected into the formed material to make the seam airtight.

Unlike a cold sealant system, the Hot Melt Sealant System has less loss of sealant due to overfilling the seam and the sealant is stored in a solid state, whereas cold sealant is scrapped when it hardens.


HVAC Rollforming, Plasma Cutting, Coiled Metal Processing and accessory tools for the contractor/manufacturer.