About Sealant Flexibility
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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.
Container | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| Primer for Dow Corning Sealant (16 fl. oz. Bottle) | 0000000 | Each | 000000 |
Ready-to-Use Silicone Potting Compounds
No mixing required—these potting compounds come ready to apply. Use them to encase electronic assemblies for protection from dust, moisture, mechanical shock, and vibration. Softer and more flexible than epoxies and urethanes with the widest temperature range, silicone potting compounds are the best choice for high-temperature applications and electronics exposed to thermal cycling. They have good moisture resistance but poor chemical and abrasion resistance. Silicones provide excellent electrical insulation. They're also known as RTV (room-temperature vulcanizing) compounds because they don’t need heat or UV light to cure.
Container | Dry Time | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mfr. Model No. | Size, fl. oz. | Type | Consistency | Touch | Overall, hrs. | Dielectric Strength, V/mil | Thermal Conductivity, W/m-K | Temp. Range, °F | Specifications Met | For Use On | Color | Clarity | Each | |
Dow Corning Compounds—Medium Soft | ||||||||||||||
| 738 | 3 | Tube | Paste | 90 min. | 24 | 475 | Not Rated | -45° to 390° | UL Listed, UL Recognized Component, MIL-A-46146, UL 94 HB | Aluminum, Copper, Steel, Plastic, Rubber, Fiberglass | White | Opaque | 0000000 | 000000 |
| 738 | 10.1 | Cartridge | Paste | 90 min. | 24 | 475 | Not Rated | -45° to 390° | UL Listed, UL Recognized Component, MIL-A-46146, UL 94 HB | Aluminum, Copper, Steel, Plastic, Rubber, Fiberglass | White | Opaque | 0000000 | 00000 |