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Top 9 Mastic Duct Sealant – Industrial Joint Sealants

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1. Red Devil

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1 Gallon, Red Devil 0841DX F-Seal 181 Fiber Reinforced Water Based Duct Sealant, Gray

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Red Devil #ad - High quality, fiber reinforced. Mildew resistant. Can be used on all types of HVAC ductwork. Ul 181 a-m & b-m certified. Interior/exterior.
BrandRed Devil #ad
ManufacturerRed Devil #ad
Height8 Inches
Length7 Inches
Weight1 Pounds
Width7 Inches
Part Number0841DX
Model0841DX

2. Red Devil

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Red Devil 0841DS RD-DS 181 Acrylic Latex Duct Sealant, 1/2 Gallon, Gray

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Red Devil #ad - Non flammable: Safe to use in enclosed areas. Mold & mildew resistant: Cured sealant will not discolor over time. Strong adhesive grip: Provides a tough bond on metal to metal connections. Permanently flexible: Acrylic latex formula provides excellent elasticity and water resistance. Interior / exterior use: Can be used either inside or outside the home.
BrandRed Devil #ad
ManufacturerRed Devil #ad
Height5 Inches
Length4 Inches
Weight6 Pounds
Width4 Inches
Part Number0841DS
Model0841DS

3. Hardcast

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Hardcast Foil-Grip 1402 Mastic Duct Sealant 2" x 100'

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Hardcast #ad - It provides an instant water resistant grip to most surfaces including sheet metal, PVC coated duct, duct board, flex board, and duct wrap vapor Barriers. Printed; size: 2" x 100'; application: indoor/outdoor. Instant adhesion. Foil-grip 1402 is a pressure sensitive, 40-year cycle, duct joint and general purpose rolled sealant. Foil-grip 1402 is suitable for subgrade application on PVC coated duct.
BrandHardcast #ad
ManufacturerHardcast #ad
Part NumberCECOMINOD078413
Model304099

4. Hardcast

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Rolled Mastic Duct Sealants Foils 3'' X100

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Hardcast #ad - Ul classified for flame spread G80-325 and G80-326. Ul 181b-fx listed for use on flexible duct systems G80-194 and G80-195. Application: Indoor/Outdoor.
BrandHardcast #ad
Manufacturerhardcast #ad
Height3 Inches
Length8 Inches
Weight4.03 Pounds
Width8 Inches
Part Number638532806335
Model1402

5. Red Devil

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1 Gallon, Red Devil 0841DW F-Seal 181 Fiber Reinforced Water Based Duct Sealant, White

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Red Devil #ad - Excellent flexibility. Interior/exterior use. Low voC. Excellent adhesion. Mold and mildew resistant.
BrandRed Devil #ad
ManufacturerRed Devil #ad
Height8 Inches
Length7 Inches
Width7 Inches
Part Number0841DW
Model0841DW

6. DAP

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DAP 08012 80126 HVAC Professional 100% Rtv Silicone Sealant, 10.3 Fl-Oz, Aluminum

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DAP #ad - 100 % rtv silicone professional grade. Protect and seal with 100% rtv silicone. Can be used indoors or outdoors.
BrandDAP #ad
ManufacturerDAP PRODUCTS INC. #ad
Height12 Inches
Length6 Inches
Weight0.76 Pounds
Width8 Inches
Part Number08012
Model08012

7. Red Devil

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1-Pack, Red Devil 089650 89650 Aluminum, 1 Pack Extreme Temperature HVAC/R Silicone Sealant, 280 ml

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Red Devil #ad - Solvent clean up. Will not crack, shrink or peel. Excellent adhesion. Long lasting flexibility. Temperature range of -60 degrees Fahrenheit to 400 degrees Fahrenheit.
BrandRed Devil #ad
ManufacturerRed Devil #ad
Height11.25 Inches
Length2 Inches
Width2 Inches
Part Number0089650
Model089650

8. Carlisle Paddles

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CCWI-181 Duct Sealant 1Gal HVAC

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Carlisle Paddles #ad - Service temperature: -20°F to 200°F. Base: Synthetic latex. Color: Gray. Voc: 29 g/l less water. Solvent: Water.
BrandCarlisle Paddles #ad
ManufacturerCarlisle HVAC Products #ad

9. 3M

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3M Aluminum Foil Tape 3340, Sealing and Patching Hot and Cold Air Ducts, 4.0 mil, 2.5" x 50 yd, Silver, Insulation, HVAC, Fiberglass Duct Board, Metal Repair

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3M #ad - Applications: heating ventilation air conditioning HVAC, rigid fiber glass duct board, vapor seal on reinforced fiberglass duct board, duct closure, flexible air ducts and air connectors.

Hot and cold temperatures: combination of a foil backing and acrylic adhesive gives this tape a superb operational temperature range of -40F-300F -40C-149C. Easy releasing liner: Poly coated Kraft paper liner protects the adhesive and keeps the tape ready for use. 0 mil total thickness with a strong, pressure sensitive acrylic adhesive is ideal as a vapor seal tape for duct closure. 0 mil aluminum foil backing 4. Vapor seal tape: 2. Long lasting: the foil backing serves as an excellent barrier against moisture, dust and many chemicals - making it strong, durable and long-lasting. Listed for both ul181a-p and UL181B-FX.
Brand3M #ad
Manufacturer3M #ad
Height6 Inches
Length3 Inches
Weight0.5 Pounds
Width3 Inches
Part Number3340
Model70006658481