#8 Mastic® - 1 gallon pail#8 Mastic® - 1 gallon pail
#8 Mastic® - 1 gallon pail
#8 Mastic® - 2 gallon pail
#8 Mastic® Caulk Tube
#8 Mastic® - 1 gallon pail

  • UL Listed
  • Weather Resistant
  • Earns LEED Credits
  • Water Borne
  • Non-Flammable
  • Low Odor
  • Easy to Apply
  • Made in U.S.A.

#8 Mastic® Sheet Metal Duct Sealant

RCD Corporation® #8 Mastic® is a water-borne sheet metal air duct sealant used for permanently sealing the joints and seams of all duct types including UL-181 listed air ducts. RCD Corporation® #8 Mastic® is the best choice for high velocity sheet metal air duct construction used in auditoriums, high rises, hospitals, industrial ventilation systems, large retail stores, malls, military buildings, prisons, schools, sports centers and complexes. It remains flexible and withstands the constant joint movement of these demanding systems.

Earns LEED credits. UL Listed. Color is gray and is easily applied by brush, extrusion, or spray equipment. RCD Technical Bulletin lists spray and extrusion equipment solutions.

Please note: To order quantities greater than available through RCD’s online store please contact us at 352.589.0099 or send an email to customercare@rcdcorp.com and we will be happy to fulfill your order.