Silicone sealants
Silicon-based Dow Corning sealants last longer and are more versatile than most organic polymer sealants. They are durable, one part RTV sealants, cure at room temperature to a tough, rubbery solid with exceptional performance characteristics, and meet a wide variety of your industrial bonding and sealing needs.
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Features of Dow Corning silicone sealants include:
● Stability over a wide temperature range – When fully cured, our products can be used at temperatures ranging from -65° to 350°C.
● Weather resistance – High resistance to UV rays, radiation and weather prevents our products from hardening, cracking, crumbling, drying and becoming brittle.
● Chemical stability – Our sealants do not readily degrade even under long-term exposure to many chemicals and atmospheric pollutants.
● Good bond strength – Our products provide good adhesion to a wide variety of industrial materials, including glass, ceramics, and wood masonry, painted surfaces, and many metals and plastics.
● Electrical properties – Designed for a variety of applications, our products can be used in various electrical and electronic applications, including devices that are thermally cycled over a wide temperature range.
● Low Flammability – In fire conditions, silicone adhesives/sealants are reluctant to burn. Many products comply with UL flammability standards.
When you specify an assembly and maintenance product from Dow Corning, you receive a solution backed by the world leader in silicone technology with more than 60 years of expertise and innovations.
Cure Type-Acetoxy
| Dow Corning Product |
MSDS |
Special Features | Temperature Range [°C] (intermittent)* | Color(s) | Skin-Over Time [min.] | Tack Free Time [min.] | Durometer [Shore A] | Tensile [MPa] | Elongation [%] | Listing/ Specifications |
|
Dow Corning Silicone AP |
Silicone AP | Multi-purpose | -50 to + 180 | clear, white, grey, black | 11 | 21 | 25 | 2.2 | 540 | |
| Dow Corning 730 | 730 | Solvent resistant | -65 to + 200 | white | 5 | 25 | 37 | 2.3 | 240 | |
| Dow Corning 732 | 732 | Multi-purpose, FDA, UL, MIL | -60 to + 180 (205) | clear, white, black | 7 | 20 | 25 | 2.3 | 540 | FDA 177.2600, UL94-HB, NSF51, NSF61, MIL-A-46106 |
| Dow Corning 734 | 734 | Flowable | -65 to+ 180 | clear, white | 7 | 13 | 27 | 1.5 | 315 | FDA 177.2600, UL94-HB, NSF51, NSF61, MIL-A-46106 |
| Dow Corning 736 | 736 | High temperature resistant | -60 to + 260 (315) | red | 10 | 17 | 26 | 2.4 | 600 | FDA 177.2600, UL94-HB, NSF51, NSF61, MIL-A-46106 |
| Dow Corning 752 | 752 | Multi-Purpose, High Temperature | -50 to+200 | clear, white, black | 10-15 | 20-25 | 24 | 2.4 | 490 | |
| Dow Corning Q3-1566 | Q3-1566 | Very high temperature resistant | -50 to + 275 (350) | black | 5 | 12 | 43 | 3.6 | 340 | |
| Q3-3379 | High temperature resistant, Flowable | -50 to + 250 (275) | red | 8 | 20 | 34 | 3.2 | 290 |
Cure Type -Neutral
| Dow Corning Product |
MSDS |
Special Features | Temperature Range [°C] (intermittent)* | Color(s) | Skin-Over Time [min.]Skin-Over Time [min.] | Tack Free Time [min.] | Durometer [Shore A] | Tensile [MPa] | Elongation [%] | Listing/ Specifications |
| Dow Corning 7091 | 7091 | Multi-purpose | -55 to + 180 | white, grey, black | 15 | 28 | 37 | 2.5 | 680 | |
| Dow Corning 7093 | 7093 | Multi-purpose, Low modulus | -55 to + 180 | white, grey, black | 15 | 28 | 30 | 1.7 | 700 | |
| AS 7096 | Multi-purpose, Translucent | -50 to + 150 | clear | 10 | 30 | 18 | 1.3 | 500 | ||
| 748 | Multi-purpose, Food contact | -55 to + 177 | white | 15 | 46 | 35 | 1.9 | 350 | FDA 177.2600, UL94-HB, MIL-A-46106 | |
| Dow Corning 3140 | 3140 | Flowable | -55 to + 180 | clear | 15 | 70 | 32 | 3.1 | 425 | UL94-V-1, MIL-A-46146 |
| Dow Corning 3145 | 3145 | MIL-Specified, High Tensile Strength | -55 to + 180 | clear, grey | 15 | 65 | 45 | 7.1 | 650 |
|
| Dow Corning 3559 | 3559 | Fast cure, High temperature resistant, Oxime cure type | -50 to+ 220 | black | 5 | 24 | 40 | 1.7 | 450 | |
| Dow Corning HM-2500 | HM-2500 | Immediate green strength, Alkoxy cure type | -32 to+ 93 | clear | - | - | 60 | 2.4 | 1000 |
|
Substrate Preparation ● Wipe contaminated surface with a clean, oil-free cloth. |
| How to Apply Apply Dow Corning adhesives/sealants to one of the prepared surfaces, then quickly cover with the other substrate to be bonded. On exposure to moisture, the freshly applied material will “skin over” in about 5-10 minutes (depending on the product) at room temperature and 50% relative humidity. Any tooling should be completed before this skin forms. The surface is easily tooled with a spatula. |
| Use of Primer For maximum adhesion, the use of Dow Corning primer is recommended. After solvent cleaning, a thin coat of Dow Corning primer is applied by wiping, brushing or spraying. At normal room temperatures and humidity conditions (room temperature, 50% relative humidity), the primer should be allowed to air dry from 5 to 30 minutes. The primer cures in contact with air moisture, low humidity will necessitate longer drying time. The required drying time for a specific area should be determined prior to use. Primer which was allowed to cure extensively will not promote adhesion anymore. As a general rule, drying time of more than 6 hours at normal temperatures and humidity should be avoided. |
| Cure Time After skin formation, cure continues inward from the surface. In 24 hours (at room temperature and 50% relative humidity) Dow Corning adhesive/sealant will cure to a depth of about 3mm. Very deep sections, especially when access to atmospheric moisture is restricted, will take longer to cure completely. Cure time is extended at lower humidity levels. As the sealants cure by reaction with moisture in the air, keep the container tightly sealed when not in use. A plug of used material may form in the tip of a tube or cartridge during storage. This is easily removed and does not affect the remaining contents. |
| Compatibility Some Dow Corning adhesives/sealants release a small amount of aceticacid during cure. This may cause corrosion on some metallic parts or substrates, especially in direct contact or when the cure is carried out in a totally enclosed environment which would not allow cure by-products to escape. |
| Health and Environmental Information To support Customers in their product safety needs, Dow Corning has an extensive Product Stewardship organization and a team of Product Safety and Regulatory Compliance (PS&RC) specialists available in each area. |
| DOW CORNING SPECIFICALLY DISCLAIMS ANY OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY. DOW CORNING DISCLAIMS LIABILITY FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES. |