Carlisle Hardcast Flex-Grip 550 Indoor/Outdoor Water-Based Air Duct Sealant Gray 11 oz — 304193
SKU: 304193
$50.00Description
- The Carlisle Hardcast Flex-Grip 550 Indoor/Outdoor Water-Based Air Duct Sealant is an industrial-grade, fiber-free mastic adhesive engineered to establish an airtight, permanently flexible structural seal across high-velocity commercial and residential ventilation networks.
- Formulated with a premium synthetic latex emulsion that is entirely LEED V4 compliant, this smooth gray paste seals systems rated up to 10" water gauge pressure to completely eliminate efficiency-robbing air leaks and drop HVAC operating costs.
- The specialized indoor/outdoor composition offers high resistance to harsh UV exposure, dynamic structural vibrations, and moisture breakdown, while an integrated ASTM G21 anti-microbial agent stops dangerous mold and mildew from cultivating along structural joint lines.
- Ideal for sheet metal mechanics, insulation contractors, and energy audit technicians, this convenient 11-ounce caulk cartridge applies flawlessly onto galvanized iron, aluminum, and flex pipes to achieve code-compliant duct sealing without severe chemical odors.
Specifications
Manufacturer / Brand
Carlisle HVAC Products (Hardcast / Carlisle Construction Materials)
Product Line / Series
Flex-Grip® High Performance Duct Sealants
Manufacturer Part Number / SKU
304193
UPC
680637113110
ASIN
B07K9PJX9Y
Container Configuration
11 oz. (325 ml) standard caulk gun cartridge
Maximum Pressure Class Rating
Rated safe for structural systems up to 10" w.g. (Water Gauge)
Operating Temperature Service Range
-20°F to 200°F (-29°C to 93°C) once fully cured
Flame and Smoke Safety Ratings
UL 723 Classified (Flame Spread Index: 0 / Smoke Developed Index: 0)
Item Total Net Weight
445 grams (0.98 lbs per filled cartridge)









