About Sealant Flexibility
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Metal Duct HVAC Sealants
Seal metal-to-metal joints in ductwork. These sealants are non-sagging, so they won't drip from vertical and overhead surfaces.
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|---|---|---|---|---|---|---|---|---|---|---|
| Size | Type | Begins to Harden | Reaches Full Strength | Tensile Strength  | Hardness | Temp. Range, °F | For Joining | Color | Each | |
Acrylic | ||||||||||
| 10.1 fl. oz. | Cartridge | 15 min. | 48 hrs. | Not Rated | Soft (Durometer 20A) | -40° to 200° | Metal | Gray | 00000000 | 00000 |
| 1 gal. | Pail | 15 min. | 48 hrs. | Not Rated | Soft (Durometer 20A) | -40° to 200° | Metal | Gray | 00000000 | 00000 |
HVAC Sealants
Form flexible water-resistant seals on metal, plastic, and rubber joints in heating, ventilation, air conditioning, and refrigeration applications. These sealants are non-sagging, so they won't drip from vertical and overhead surfaces. Made from silicone, sealants are RTV (room-temperature vulcanizing).
Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain.
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Tensile Strength, psi | Hardness | Temp. Range, °F | Specifications Met | For Joining | Choose a Color | Each | |
Dow Corning Silicone | |||||||||||||
| 10.3 | Cartridge | 5 min. | 24 hrs. | 600% | -25% to 25% | 325 | Soft (Durometer 27A) | -40° to 350° | UL Listed, FDA Compliant 21 CFR 177.2600, UL 94 HB | Metal Metal to Plastic Metal to Rubber Metal to Composites Plastic Rubber Composites | 000000 | 000000 | |
Silicone | |||||||||||||
| 9.4 | Cartridge | 20 min. | 24 hrs. | Not Rated | -25% to 25% | Not Rated | Soft (Durometer 26A) | -60° to 400° | Fed. Spec. TT-S-001543A Class A, Fed. Spec. TT-S-00230C Class A | Metal Metal to Plastic Metal to Rubber Metal to Composites Plastic Rubber Composites | 0000000 | 0000 | |
| Primer for Dow Corning Sealant (16 fl. oz. Bottle) | 0000000 | Each | 000000 |
Surface Fillers
These surface fillers can be used on vertical surfaces without sagging. They repair cracked, worn, and damaged surfaces. The size listed is the combined total of the two parts.
Devcon Aluminum Liquid, Devcon Aluminum Putty, and Devcon FasMetal™ 10 HVAC Repair form a nonrusting finish.
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mfr. Model No. | Size | Type | Begins to Harden, min. | Reaches Full Strength | Consistency | Mix Ratio | Approx. Coverage @ Thick. | Temp. Range, °F | Color | Finishing Method | For Use On | Each | |
Devcon FasMetal™ 10 HVAC Repair | |||||||||||||
| 19770 | 6.5 fl. oz. | Tube | 60 | 16 hrs. | Paste | 1:1 | 30 sq. in. @ 1/4" | -40° to 250° | Aluminum | Machine, Drill, Sand, Saw, Tap | Aluminum, Steel, Stainless Steel, Ceramic, Concrete, Fiberglass, Wood | 00000000 | 000000 |