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Description for 3M 08662 Super Silicone Adhesive/Sealants
A paste-like, one-component material which cures to a tough, rubbery solid when exposed to moisture in the air. It will adhere to clean metal, glass, wood, ceramic, natural and synthetic fiber, painted surfaces, and many plastics.Chemical Resistance Chemical Resistance: Fluid Resistance: Good Water Resistance Application Type Bond, Seal 1 Part or 2 Part 1-Part Material Form Paste Substrate ceramic, fabrics, glass, clean metal, many plastics, Rubber, wood, vinyl Industry Automotive trim, Filleting joints to provide a water and dust barrier, Caulking joints to provide a water and dust barrier Manufacturer 3M Chemistry Silicone Application Method Spatula Cure Method Moisture Cure Temperature (°C) 25 Cure Time (min) Fast, 1,440 Viscosity (cPs) Non-sagging Paste Color Black Ozone Resistance Excellent ozone resistance High Temperature Resistance (°C) High Temperature Resistance, 204 Low Temperature Resistance (°C) -60 Other Resistance Excellent Extreme resistance Density (g/cm³) 8.5 (lbs/Gallon) (Appx.) -
Technical Data for 3M 08662 Super Silicone Adhesive/Sealants
Overview
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Chemical Resistance
- Chemical Resistance : Fluid Resistance : Water Resistance - Good Water Resistance
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1 Part or 2 Part
- 1-Part
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Material Form
- Paste
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Industry
- Other Transportation - Drip rails
- Automotive - Automotive trim
- Joints - Filleting joints to provide a water and dust barrier, Caulking joints to provide a water and dust barrier
- Other - Taillight and sunroof assemblies, Vinyl roof top fabrics
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Chemistry
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Application Method
- Spatula/Trowel - Spatula
- Other - Wooden paddle
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Cure Method
- Moisture / Condensation Cure - Moisture
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Color
- Black
Specifications
Cure Specs
Cure Temperature (°C) 25 Test Method Cure Time (min) Fast, 1,440 Test Method Viscosity (cPs) Non-sagging Paste Tack Free Time (min) 10 to 20 Test Method Bond Strength
Tensile Strength (psi) 325 Material Resistance
Ozone Resistance Excellent ozone resistance Environmental Resistance Excellent weather resistance High Temperature Resistance (°C) High Temperature Resistance, 204 Low Temperature Resistance (°C) -60 Moisture/Humidity Resistance Excellent moisture resistance Other Resistance Excellent Extreme resistance Vibration Resistance/Shock Resistance Excellent vibration resistance Hardness
Shore A Hardness 25 Test Method Elongation (%) 550 Test Method Flexibility Flexible Other Properties
% Solids (%) 100 Test Method Density (g/cm³) 8.5 (lbs/Gallon) (Appx.) Business Information
Shelf Life Details Store at room temperature. Rotate stock on a "first-in, first-out" basis. When stored at the recommended conditions in original, unopened containers, this product has a shelf life of 18 months. Shelf Life Temperature (°F) Room temperature Shelf Life (mon) 18 -
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Best Practices for 3M 08662 Super Silicone Adhesive/Sealants
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Surface Preparation
Thoroughly clean surfaces to be bonded. Rubber surfaces should be abraded and wiped clean.
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Application
Apply silicone to area that is to be sealed or bonded. The paste-like consistency makes it easy to tool with a spatula or wooden paddle.
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Curing
Super Silicones cure from the outside in. At conditions of 75°F and 50% RH, they form a tack free skin within 20 minutes. Tooling is not practical after the skin begins forming. Cure time is affected by humidity, degree of confinement, and thickness of the adhesive/sealant bead. Lower humidity and/or temperature will extend the cure time. Higher humidity and/or temperature will reduce the cure time. In applications where the adhesive/sealant is confined during cure, the time required for proper cure is generally lengthened.
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Cure Temperature Test Methods
Cure Temperature | Cure Time Test Method |
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25°C | Exposed to air at @ 77°F and 50% RH, 1/8 inch thickness |
Cure Time Test Methods
Cure Time | Test Method |
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Fast | |
1,440 min | Exposed to air at @ 77°F and 50% RH, 1/8 inch thickness |
Tack Free Time Test Methods
Tack Free Time | Tack Free Temperature | Test Method |
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10 to 20 min | 25°C | Exposed to air at @ 77°F and 50% RH |
Elongation Test Methods
Elongation | Test Method |
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550 % | Measured on 1/4 inch thick samples cured for 72 Hrs. at 77°F and 50% RH |
Shore A Hardness Test Methods
Shore A Hardness | Shore Hardness Test Method |
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25 | Measured on 1/4 inch thick samples cured for 72 Hrs. at 77°F and 50% RH |
% Solids Test Methods
% Solids | Test Method |
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100 % | Appx. |

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