Difference between revisions of "Dowsil silicone sealants"
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| Line 15: | Line 15: | ||
! Cure type | ! Cure type | ||
! Properties | ! Properties | ||
| − | |||
! Applications | ! Applications | ||
! Risks | ! Risks | ||
| Line 23: | Line 22: | ||
| Dowsil 580 Neutral cure | | Dowsil 580 Neutral cure | ||
| Silicone; oxime neutral cure; one component | | Silicone; oxime neutral cure; one component | ||
| − | |||
| | | | ||
| General Glazing; Weather-sealing applications for windows, doors, glass, metal, masonry | | General Glazing; Weather-sealing applications for windows, doors, glass, metal, masonry | ||
| Line 33: | Line 31: | ||
| Silicone; oxime neutral cure; one component | | Silicone; oxime neutral cure; one component | ||
| | | | ||
| − | | Adhesion to most materials | + | | Adhesion to most materials; Adhering plastic moldings to plastic substrates for trim applications; Waterproofing electrical components |
| − | |||
| Not recommended for water immersion, or use on painted surface; may discolor brass, or copper; may stress craze polycarbonates | | Not recommended for water immersion, or use on painted surface; may discolor brass, or copper; may stress craze polycarbonates | ||
| MMA 2016 (U); BKM 2017 (U); BKM 2018 Px4) BKM 2018 (U) | | MMA 2016 (U); BKM 2017 (U); BKM 2018 Px4) BKM 2018 (U) | ||
| Line 41: | Line 38: | ||
| Dowsil 739 RTV | | Dowsil 739 RTV | ||
| Silicone; moisture cure; one component | | Silicone; moisture cure; one component | ||
| − | |||
| | | | ||
| Adheres well to unprimed metals, ceramics and glass and some plastics; | | Adheres well to unprimed metals, ceramics and glass and some plastics; | ||
| Line 51: | Line 47: | ||
| Silicone; moisture cure; one component; medium modulus | | Silicone; moisture cure; one component; medium modulus | ||
| | | | ||
| − | | | + | | Good for inside display envelope: glass and metal joins; glass and glass joins; Goppion uses black, grey, white due to aesthetic reasons (transparent caulks yellow within 5 years) |
| − | |||
| | | | ||
| MMA 2016 (T); AMNH 2019 (Tx2); MMA 2021 (T); white is unsuitable | | MMA 2016 (T); AMNH 2019 (Tx2); MMA 2021 (T); white is unsuitable | ||
| − | | https://www.dow.com/en-us/pdp.dowsil-791-weatherproofing-sealant.04082594h.html#overview | + | | [https://www.dow.com/en-us/pdp.dowsil-791-weatherproofing-sealant.04082594h.html#overview Dowsil 791] |
|- | |- | ||
| Dowsil 795 Building Sealant | | Dowsil 795 Building Sealant | ||
| − | | Silicone; moisture cure; one component; medium modulus | + | | Silicone; moisture cure; one component; medium modulus |
| − | |||
| extra thick; skins over too quickly | | extra thick; skins over too quickly | ||
| Structural and nonstructural glazing; for most new construction and remedial sealing applications; weather sealing of most common construction materials including glass, aluminum, steel, painted metal, EIFS, granite and other stone, concrete, brick and plastics | | Structural and nonstructural glazing; for most new construction and remedial sealing applications; weather sealing of most common construction materials including glass, aluminum, steel, painted metal, EIFS, granite and other stone, concrete, brick and plastics | ||
| Not recommended for water immersion, or wet or cold surfaces; not paintable | | Not recommended for water immersion, or wet or cold surfaces; not paintable | ||
| AWMM 2008 (U); MMA 2016 (Px2); MMA 2020 (Ux2); MMA 2021 (T) | | AWMM 2008 (U); MMA 2016 (Px2); MMA 2020 (Ux2); MMA 2021 (T) | ||
| − | | https://www.dow.com/en-us/pdp.dowsil-795-silicone-building-sealant.01595717z.html#tech-content | + | | [https://www.dow.com/en-us/pdp.dowsil-795-silicone-building-sealant.01595717z.html#tech-content Dowdil 795] |
|- | |- | ||
| Dowsil 9-1374 Silicone sealant | | Dowsil 9-1374 Silicone sealant | ||
| Silicone; alkoxy neutral cure; one component | | Silicone; alkoxy neutral cure; one component | ||
| − | |||
| | | | ||
| Used for formed in place gaskets; provides strong flexible bond for movable or expanding joints, such as when bonding materials with different thermal expansion rates such as glass to metal, or glass to plastic or metal to plastic | | Used for formed in place gaskets; provides strong flexible bond for movable or expanding joints, such as when bonding materials with different thermal expansion rates such as glass to metal, or glass to plastic or metal to plastic | ||
| | | | ||
| MMA 2016 (Tx2) | | MMA 2016 (Tx2) | ||
| − | | https://www.dow.com//en-us/pdp.dowsil-9-1374-silicone-sealant.03119556h.html#overview | + | | [https://www.dow.com//en-us/pdp.dowsil-9-1374-silicone-sealant.03119556h.html#overview Dowsil 9-1734] |
|- | |- | ||
| Dowsil 3145 RTV Mil-A-46146 Adhesive / Sealant | | Dowsil 3145 RTV Mil-A-46146 Adhesive / Sealant | ||
| Silicone; moisture cure; one component | | Silicone; moisture cure; one component | ||
| − | | Skin-over time = 15 min; | + | | Skin-over time = 15 min; hard to work with; requires experienced person to apply and clean up; viscous, does not flow |
| − | |||
| Sealing openings in modules and housings; Adding mechanical stability to individual components; adheres to glass and nylon | | Sealing openings in modules and housings; Adding mechanical stability to individual components; adheres to glass and nylon | ||
| − | | Good | + | | Good adhesion cannot be expected on non-reactive metal substrates or non-reactive plastic surfaces such as Teflon, polyethylene or polypropylene. |
| AWMM 1988 (P); BKM 2016 (Px2); BKM 2017 (Px2); AWNH 2019 (T) | | AWMM 1988 (P); BKM 2016 (Px2); BKM 2017 (Px2); AWNH 2019 (T) | ||
| − | | https://www.dow.com//en-us/pdp.dowsil-3145-rtv-mil-a-46146-adhesive-sealant.01059548z.html#tech-content | + | | [https://www.dow.com//en-us/pdp.dowsil-3145-rtv-mil-a-46146-adhesive-sealant.01059548z.html#tech-content Dowsil 3145] |
|- | |- | ||
| Dowsil 7091 Adhesive Sealant | | Dowsil 7091 Adhesive Sealant | ||
| Silicone; moisture cure; one component | | Silicone; moisture cure; one component | ||
| Skin-over time = 15 min; | | Skin-over time = 15 min; | ||
| − | | | + | | Provides strong but flexible bond, such as when bonding materials with differing thermal expansion rates, e.g. glass to metal or glass to plastic |
| − | + | | For maximum adhesion, the use of DOWSIL™ 1200 OS Primer is recommended. | |
| − | | | ||
| BKM 2016 (P); BKM 2017 (P); MMA 2017 (P); AMNH 2019 (T) | | BKM 2016 (P); BKM 2017 (P); MMA 2017 (P); AMNH 2019 (T) | ||
| − | | https://www.dow.com//en-us/pdp.dowsil-7091-adhesive-sealant.02436621h.html#tech-content | + | | [https://www.dow.com//en-us/pdp.dowsil-7091-adhesive-sealant.02436621h.html#tech-content Dowsil 7091] |
|- | |- | ||
| Dowsil 993 | | Dowsil 993 | ||
| Two-component, fast cure neutral-cure | | Two-component, fast cure neutral-cure | ||
| Click Netherfield mentioned this one as one they use | | Click Netherfield mentioned this one as one they use | ||
| − | |||
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| Line 104: | Line 94: | ||
| Silastic 1080 RTV | | Silastic 1080 RTV | ||
| Silicone; one component | | Silicone; one component | ||
| − | |||
| | | | ||
| Provides reliable, long-lasting bonds with a wide range of substrates, including ceramics, metals, glass and filled plastics, | | Provides reliable, long-lasting bonds with a wide range of substrates, including ceramics, metals, glass and filled plastics, | ||
| − | | | + | | Long service life, wide operating temperatures, resistance to oils and solvents; water and steam resistant |
| AWMM 1988 (P) | | AWMM 1988 (P) | ||
| − | | [https://www.dow.com/en-us/brand/silastic.html] | + | | [https://www.dow.com/en-us/brand/silastic.html Silastic RTV] |
|} | |} | ||
Revision as of 12:47, 1 November 2022
Description
[Dow] Dow produces numerous types of one-part, neutral-cure Silicone materials that can be used as adhesives/sealants. These room temperature vulcanizing (RTV) silicones were introduced in the 1960s and cure upon exposure to atmospheric moisture. There are two type of neutral cure RTS silicones. The first if an alkoxy neutral-cure that releases methanol upon cure. The alkoxy neutral cure silicones are considered suitable for use on all types of metal without risk of corrosion. The second type is an oxime neutral-cure silicones that releases methyl ethyl ketoxime. These withstand temperature better than alkoxy-cure but can cause stress-cracking in some plastic boards, such as polycarbonate and acrylics.
General properties for Dowsil silicones include:
- Stability over a wide temperature range – When fully cured, most can be used at temperatures ranging from -85° to 599°F (-65° to 315°C).
- Weather resistance – High resistance to UV rays, radiation and weather prevents our products from hardening, cracking, crumbling, drying and becoming brittle.
- Chemical stability – Do not readily degrade, even under long-term exposure to many chemicals and atmospheric pollutants.
- Good bond strength – Provide good adhesion to a wide variety of industrial materials, including glass, ceramics and wood masonry; painted surfaces; and many metals and plastics.
- Low flammability – In fire conditions, silicone adhesives/sealants are reluctant to burn. Many products comply with UL flammability standards.
| Commercial name | Cure type | Properties | Applications | Risks | Oddy tests | Product website |
|---|---|---|---|---|---|---|
| Dowsil 580 Neutral cure | Silicone; oxime neutral cure; one component | General Glazing; Weather-sealing applications for windows, doors, glass, metal, masonry | Not recommended for water immersion; do not use on structural glazing; may discolor copper and brass; cannot be painted; not for use on polycarbonates | AWMM 2007 (T); AWMM 2008 (T) | Dowsil 580 | |
| Dowsil 737 Neutral Cure | Silicone; oxime neutral cure; one component | Adhesion to most materials; Adhering plastic moldings to plastic substrates for trim applications; Waterproofing electrical components | Not recommended for water immersion, or use on painted surface; may discolor brass, or copper; may stress craze polycarbonates | MMA 2016 (U); BKM 2017 (U); BKM 2018 Px4) BKM 2018 (U) | Dowsil 737 | |
| Dowsil 739 RTV | Silicone; moisture cure; one component | Adheres well to unprimed metals, ceramics and glass and some plastics; | Does not adhere to Teflon, polyethylene, polypropylene, or highly plasticized plastics or rubbers. | MMA 2016 (P) | Dowsil 739 | |
| Dowsil 791 Weatherproof Sealant | Silicone; moisture cure; one component; medium modulus | Good for inside display envelope: glass and metal joins; glass and glass joins; Goppion uses black, grey, white due to aesthetic reasons (transparent caulks yellow within 5 years) | MMA 2016 (T); AMNH 2019 (Tx2); MMA 2021 (T); white is unsuitable | Dowsil 791 | ||
| Dowsil 795 Building Sealant | Silicone; moisture cure; one component; medium modulus | extra thick; skins over too quickly | Structural and nonstructural glazing; for most new construction and remedial sealing applications; weather sealing of most common construction materials including glass, aluminum, steel, painted metal, EIFS, granite and other stone, concrete, brick and plastics | Not recommended for water immersion, or wet or cold surfaces; not paintable | AWMM 2008 (U); MMA 2016 (Px2); MMA 2020 (Ux2); MMA 2021 (T) | Dowdil 795 |
| Dowsil 9-1374 Silicone sealant | Silicone; alkoxy neutral cure; one component | Used for formed in place gaskets; provides strong flexible bond for movable or expanding joints, such as when bonding materials with different thermal expansion rates such as glass to metal, or glass to plastic or metal to plastic | MMA 2016 (Tx2) | Dowsil 9-1734 | ||
| Dowsil 3145 RTV Mil-A-46146 Adhesive / Sealant | Silicone; moisture cure; one component | Skin-over time = 15 min; hard to work with; requires experienced person to apply and clean up; viscous, does not flow | Sealing openings in modules and housings; Adding mechanical stability to individual components; adheres to glass and nylon | Good adhesion cannot be expected on non-reactive metal substrates or non-reactive plastic surfaces such as Teflon, polyethylene or polypropylene. | AWMM 1988 (P); BKM 2016 (Px2); BKM 2017 (Px2); AWNH 2019 (T) | Dowsil 3145 |
| Dowsil 7091 Adhesive Sealant | Silicone; moisture cure; one component | Skin-over time = 15 min; | Provides strong but flexible bond, such as when bonding materials with differing thermal expansion rates, e.g. glass to metal or glass to plastic | For maximum adhesion, the use of DOWSIL™ 1200 OS Primer is recommended. | BKM 2016 (P); BKM 2017 (P); MMA 2017 (P); AMNH 2019 (T) | Dowsil 7091 |
| Dowsil 993 | Two-component, fast cure neutral-cure | Click Netherfield mentioned this one as one they use | ||||
| Silastic 1080 RTV | Silicone; one component | Provides reliable, long-lasting bonds with a wide range of substrates, including ceramics, metals, glass and filled plastics, | Long service life, wide operating temperatures, resistance to oils and solvents; water and steam resistant | AWMM 1988 (P) | Silastic RTV |
Personal Risks
- Wear eye, hands, and respiratory protection.
- SDS: sheets
Collection Risks
Literature indicates the sealant has no significant volatile components. Some silicones have curing byproducts of ethanol, peroxides or ketones. Risk to museum collections could occur if an object comes in contact with the sealant causing possible staining or adhesion (if not fully cured).
Resources and Citations
- Antala: Dow Silicone Selection guide (contains information on 3145 and 7190)
- Americas: Cow Silicon Technical Manual (contains information on 791, 795 and 993)