Unfortunately i have come across some red mastic which is designed for commercial use.
Ul approved duct tape.
3m venture tape ul181a p aluminum foil tape 1581a is a high temperature high strength ul printed aluminum foil tape coated with an acrylic pressure sensitive adhesive that meets ul181a p ul181b fx and ulc s102 specifications.
Nashua 324a cold weather foil tape is ul code approved for sealing class 1 rigid 181 amp p or class 1 flexible 181b fx duct joints and connections.
The redstuff is petroleum based and should be avoided.
As i recall ul 181 foil faced tape was rated as a sealant only when applied on duct board with an iron and squeegeed.
Connect the duct segments then mechanically fasten each connection with 1 4 inch sheet metal screws.
Prevents inspection failure due to using a tape that does not meet code.
The tape excels in a variety of temperatures and environmental conditions including high.
Nashua 324a cold weather foil tape is ul nashua 324a cold weather foil tape is ul code approved for sealing class 1 rigid 181 amp p or class 1 flexible 181b fx duct joints and connections.
Conformable foil is excellent for rigid duct board applications.
Af 099 aluminum foil hvac tape that s ul 181a p b fx listed for use on rigid fiberglass ductboard and flexible air duct.
Duck brand foil tape combines both the excellent sealing and protective benefits of aluminum with the superior adhesion of duck brand duct tape.
Ensures that the tape has been rigorously tested for adhesion and resistance to thermal cycles preventing tape failure.
This ul181a p listed silver adhesive tape is approved for use on rigid air ducts and is rated for flame spreads and smoke development.
Offering superior shear strength and excellent tearability ul 181b fx listed.
Cloth duct tapes pc 858 pc 858ca cec approved ul 181b fx listed printed cloth duct tape california energy commission cec approved cloth duct tape used in the hvac industry to seal seam and join class 1 flex duct and can also be used to seal flex duct to fitting joints without being in combination with mastic.
This listing has more stringent testing requirements that must be passed in order to be approved and must be made of either aluminum or aluminum alloy foil with a minimum width of 2 5 inches.
Aluminum foil hvac tape for joining and sealing joints connections and seams on rigid fiberglass ductboard and flexible air duct and can also be used in place of mechanical fasteners on rigid ductboard.
Indicates that the tape helps achieve full system closure when properly applied to ensure the effectiveness of your reflective insulation.
With a heavy duty foil backing that is printed for easy inspection and an aggressive acrylic adhesive nashua 324 amp is the ideal choice for heating.
5 wrap the outside of the joint seams with ul approved 181a aluminum foil backed duct sealing.
