HVAC Duct Sealants
Rolled sealants incorporate non-curing VOC free butyl laminated to a variety of facings.á Roll sealants provide a superior service life compared to less expensive standard duct tapes. All of the products, when installed in accordance with recommended manufacturers instructions, provide maintenance free service during the normal life of undisturbed ductwork.
Recent adoption of the International Energy Conservation Code by state and municipal entities has increased the demand for mastics, which have achieved a UL 181 Listed rating.
Current listings are identified as
UL 181 A-M and UL 181 B-M and
refer to tests conducted by
UL using mastic on rigid and flexible duct material.á
Additionally, these same products are suitable for use on galvanized metal ductwork. Although current UL 181test standards do not include galvanized metal ductwork the efficacy on metal is implied based on historical evidence.
The International Conservation Code requires the sealing of all transverse and longitudinal duct joints.á
Further only UL 181 Listed Liquid Mastics and Rolled Sealants are allowed. The use of unlisted duct tape is not allowed.