Optical Grade Silicone Encapsulants
Mix Ratio 1:1, 2-Part Platinum Addition
| Product Code | Refractive Index | Tensile Strength (MPa) | Elongation (%) | Durometer (A) | Viscosity Mixed (cSt) | Specific Gravity | Cure Time/Temp | Potlife (hr) |
|---|---|---|---|---|---|---|---|---|
| Gelest OE39 (PP2-OE39) | 1.39 | 0.10 | 212 | 13 | 4,163 | 1.13 | 2h/80 °C | 2 |
| Gelest OE41 (PP2-OE41) | 1.41 | > 2 | 140-200 | 15-30 | 1,750-2,500 | -- | 4h/80 °C | 18 |
| Gelest OE42 (PP2-OE42) | 1.42 | > 1.5 | 90-150 | 10-25 | 1,500-2,000 | -- | 4h/80 °C | 18 |
| Gelest OE43 (PP2-OE43) | 1.43 | > 1.5 | 75-100 | 5-15 | 800-1,500 | -- | 4h/80 °C | 18 |
| Gelest OE46 (PP2-OE46) | 1.46 | 0.25 | 30-50 | 10-20 | 1,500-2,500 | 1.05 | 4h/80 °C | 18 |
| Gelest OE46.1 (PP2-OE46.1) | 1.46 | 0.55 | 65-75 | 30-45 | 15,000 | 1.19 | 4h/80 °C | 18 |
| Gelest OE46.2 (PP2-OE46.2) | 1.46 | 1-1.5 | 200-250 | 45-50 | 30,000 | 1.22 | 4h/80 °C | 18 |
| Gelest OE50 (PP2-OE50) | 1.49 | 0.13 | 160 | 11 | 3,819 | 1.07 | 4h/55 °C | >4 |
HardSil™ CC Clear Casting and Impregnation Resin PP2-HSCC
Applications:
- electrical components – high temperature, high power encapsulating and mounting resin
- laminated structures – hard, heat resistant impregnants for continuous exposures up to 300 °C
- X-ray equipment – radiation resistant encapsulating resin
Description: HardSil™ CC is a peroxide curable solventless silicone resin supplied with catalyst. Provides rigid silicone resins with excellent optical properties. HardSil™ CC is a curable phenyl silicone resin with excellent thermal stability and good electrical properties.
Bulk Properties:
- color: clear-straw transparent
- dielectric strength (1/8′): 350 volts/mil
- volume resistivity: 5 x 1015 ohm-cm
- refractive index: 1.530
Resin Properties:
- form: liquid
- viscosity: 80-150 cSt
- flashpoint: 35 °C
- specific gravity: 1.10
Shelf life: 12 months when stored below 25 °C in sealed containers.
Cautions: Use in a well ventilated area. Avoid contact with skin and eyes. Part B catalyst is an oxidizer and should be stored away from flammables.
Application Methods:
Gelest HardSil™ CC Part A (resin) and 1 wt % Part B (peroxide) are combined and mixed thoroughly. The mix is poured or applied as an an encapsulant or impregnant. Cure is for 6 hours at 150 °C followed by two hours at 200 °C. If the component is operating above 200 °C, it should be cured for three hours at the maximum operating temperature before entering service.
Gelest® OE 39: 1.39 Refractive Index 2-Part Silicone RTV Elastomer (1:1 kit) PP2-OE39
Description: Gelest® OE 39 is an optically clear cladding, encapsulation and coating compound. Gelest® OE 39 can also be used to fabricate acoustic lenses. The moderate viscosity of the catalyzed mix, long pot-life at room temperature and moderate cure temperature make this extremely useful in laboratory, prototype and small production run applications.
Cured Properties:
- refractive index at 25 °C: 1.39
- tensile strength: 0.10 MPa
- elongation: 212%
- durometer, Shore A: 13
- specific gravity: 1.13
Uncured Properties:
- viscosity (1:1) catalyzed: 4,163 cP
- viscosity (1:1) Part A: 4,327 cP
- viscosity (1:1) Part B: 3,772 cP
Application Methods:
Thoroughly mix Part A with Part B in a 1:1 ratio. Mix and de-air under vacuum as necessary. The pot-life is 2 hours at 25 °C. Pot-life may be extended by storing at 5 °C. Pour into mold or apply to substrate. Avoid entrapping air. Cure at 80 °C for 2 hours.
Gelest OE® 41 1.41 refractive index 2-part silicone RTV encapsulant, supplied as 1:1 kit PP2-OE41
Applications:
- electronic devices – provide mechanical and chemical protection to electronic components, free of abrasive silica
- optical devices – index matching, cladding, or transmission media applications
- supported membranes – filler-free silicone allows maximum transport of gases
Description: Gelest OE® 41 is a flexible, optically clear molding, encapsulation and coating compound. The low viscosity of the catalyzed mix, long pot-life at room temperature and moderate cure temperature make this extremely useful in laboratory, prototype and small production run applications. Provide rapid-cure pure silicone elastomers with high optical transmission. They have relatively low viscosity and extended pot-life, allowing potting, embedding, and coating. Systems are vinyl-addition (platinum) cure.
Cured Properties:
- refractive index: 1.407
- tensile strength: > 300 psi
- elongation: 140-200%
- durometer, Shore A: 15-30
- tear strength: 5-15 pli
Uncured Properties:
- viscosity (1:1) catalyzed: 1750-2500 cSt
Application Methods:
Thoroughly mix Part A with Part B in a 1:1 ratio. De-air mix under vacuum for about 20 minutes. The pot-life is 18 hours at 25 °C. Pot-life may be extended by storing at 5 °C. Pour into mold or apply to substrate. Avoid entrapping air. Cure at 55 °C for 4 hours or at room temperature over 72 hours.
Gelest OE® 41 is available in several versions in which cure speed or volatile content has been varied to match special requirements.
Gelest OE® 41.2: Accelerated Cure (PP2-OE41.2)
Rapid cure version of standard Gelest OE® 41, cures in less than 1 hour at room temperature, has a working time of about 10 minutes.
Gelest OE® 41.4: Extended Cure (PP2-OE41.4)
Slow cure version of standard Gelest OE® 41, offers a pot-life of 48 hours at room temperature. Cures in one hour at 120 °C.
Gelest OE® 41.6: Low Volatility (PP2-OE41.6)
Low volatility content of Gelest OE® 41.6 offers advantages in electrical and high vacuum where bleed or migration of low molecular weight species can have deleterious effects.
Gelest OE® 42 1.42 refractive index 2-part silicone RTV encapsulant, supplied as 1:1 kit PP2-OE42
Applications:
- electronic devices – provide mechanical and chemical protection to electronic components, free of abrasive silica
- optical devices – index matching, cladding, or transmission media applications
- supported membranes – filler-free silicone allows maximum transport of gases
Description: Gelest OE® 42 is a flexible, optically clear molding, encapsulation and coating compound, offering improved adhesion to substrates compared to Gelest OE® 41. The low viscosity of the catalyzed mix, long pot-life at room temperature and moderate cure temperature make this extremely useful in laboratory, prototype and small production run applications. Provide rapid-cure pure silicone elastomers with high optical transmission. They have relatively low viscosity and extended pot-life, allowing potting, embedding, and coating. Systems are vinyl-addition (platinum) cure.
Cured Properties:
- refractive index: 1.420
- tensile strength: > 200 psi
- elongation: 90-150%
- durometer, Shore A: 10-25
- tear strength: 5-10 pli
Uncured Properties:
- viscosity (1:1) catalyzed: 1500-2000 cSt
Application Methods:
Thoroughly mix Part A with Part B in a 1:1 ratio. De-air mix under vacuum for about 20 minutes. The pot-life is 18 hours at 25 °C. Pot-life may be extended by storing at 5 °C. Pour into mold or apply to substrate. Avoid entrapping air. Cure at 55 °C for 4 hours or at room temperature over 72 hours.
Gelest OE® 43 1.43 refractive index 2-part silicone RTV encapsulant, supplied as 1:1 kit PP2-OE43
Applications:
- electronic devices – provide mechanical and chemical protection to electronic components, free of abrasive silica
- optical devices – index matching, cladding, or transmission media applications
- supported membranes – filler-free silicone allows maximum transport of gases
Description: Gelest OE® 43 is a flexible, optically clear molding, encapsulation and coating compound, offering improved adhesion to substrates compared to Gelest OE® 41. The low viscosity of the catalyzed mix, long pot-life at room temperature and moderate cure temperature make this extremely useful in laboratory, prototype and small production run applications. Provide rapid-cure pure silicone elastomers with high optical transmission. They have relatively low viscosity and extended pot-life, allowing potting, embedding, and coating. Systems are vinyl-addition (platinum) cure.
Cured Properties:
- refractive index: 1.430
- tensile strength: > 200 psi
- elongation: 75-100%
- durometer, Shore A: 5-15
- tear strength: 5-10 pli
Uncured Properties:
- viscosity (1:1) catalyzed: 800-1500 cSt
Application Methods:
Thoroughly mix Part A with Part B in a 1:1 ratio. De-air mix under vacuum for about 20 minutes. The pot-life is 18 hours at 25 °C. Pot-life may be extended by storing at 5 °C. Pour into mold or apply to substrate. Avoid entrapping air. Cure at 55 °C for 4 hours or at room temperature over 72 hours.
Gelest® OE 46 1.46 Refractive Index 2-Part Silicone RTV Elastomer (1:1 kit), PP2-OE46
Description: Gelest® OE 46 is a flexible, optically clear molding, encapsulation and coating compound. Refractive index of Gelest® OE 46 matches glass, allowing for fabrication with ‘invisible’ joints. The low viscosity of the catalyzed mix, long pot-life at room temperature, and moderate cure temperature make this extremely useful in laboratory, prototype, and small production run applications. This filler-free material offers the lowest transmission loss of the medium refractive index (1.46) elastomers.
Cured Properties:
- refractive index: 1.46
- tensile strength: 0.25 MPa
- elongation: 30-50%
- durometer, Shore A: 10-20
- specific gravity: 1.05
Uncured Properties:
- viscosity (1:1) catalyzed: 1,500-2,500 cSt
Application Methods:
Thoroughly mix Part A with Part B in a 1:1 ratio. De-air mix under vacuum for about 20 minutes. The pot-life is 18 hours at 25 °C. Pot-life may be extended by storing at 5 °C. Pour into mold or apply to substrate. Avoid entrapping air. Cure at 55 °C for 4 hours or at room temperature over 72 hours.
Gelest® OE 46.1 1.46 Refractive Index 2-Part Silicone RTV Elastomer, Medium Strength (1:1 kit), PP2-OE46.1
Description: Gelest® OE 46.1 is a flexible, optically clear molding, encapsulation and coating compound. Refractive index of Gelest® OE 46.1 matches glass, allowing for fabrication with ‘invisible’ joints. The long pot-life at room temperature and moderate cure temperature make this extremely useful in laboratory, prototype, and small production run applications.
Cured Properties:
- refractive index: 1.46
- tensile strength: 0.55 MPa
- elongation: 65-75%
- durometer, Shore A: 30-45
- specific gravity: 1.19
Uncured Properties:
- viscosity (1:1) catalyzed: 15,000 cSt
Application Methods:
Thoroughly mix Part A with Part B in a 1:1 ratio. De-air mix under vacuum for about 20 minutes. The pot-life is 18 hours at 25 °C. Pot-life may be extended by storing at 5 °C. Pour into mold or apply to substrate. Avoid entrapping air. Cure at 55 °C for 4 hours or at room temperature over 72 hours.
Gelest® OE 46.2 1.46 Refractive Index 2-Part Silicone RTV Elastomer, Medium Strength (1:1 kit), PP2-OE46.2
Description: Gelest® OE 46.2 is a flexible, optically clear molding, encapsulation and coating compound. Refractive index of Gelest® OE 46.2 matches glass, allowing for fabrication with ‘invisible’ joints. The long pot-life at room temperature and moderate cure temperature make this extremely useful in laboratory, prototype, and small production run applications.
Cured Properties:
- refractive index: 1.46
- tensile strength: 1-1.5 MPa
- elongation: 200-250%
- durometer, Shore A: 45-50
- specific gravity: 1.22
Uncured Properties:
- viscosity (1:1) catalyzed: 30,000 cSt
Application Methods:
Thoroughly mix Part A with Part B in a 1:1 ratio. De-air mix under vacuum for about 20 minutes. The pot-life is 18 hours at 25 °C. Pot-life may be extended by storing at 5 °C. Pour into mold or apply to substrate. Avoid entrapping air. Cure at 55 °C for 4 hours or at room temperature over 72 hours.
Gelest® OE 50 1.50 Refractive Index 2-Part Silicone RTV Elastomer (1:1 kit), PP2-OE50
Description: Gelest® OE 50 is a flexible, optically clear molding, encapsulation and coating compound. The higher refractive index of Gelest® OE 50 can act as cladding in optical waveguide applications. The low viscosity of the catalyzed mix, long pot-life at room temperature and moderate cure temperature make this extremely useful in laboratory, prototype and small production run applications.
Cured Properties:
- refractive index: 1.49
- tensile strength: 0.13 MPa
- elongation: 160%
- durometer, Shore A: 11
- specific gravity, Part A: 1.075
- specific gravity, Part B: 1.078
Uncured Properties:
- viscosity (1:1) catalyzed: 3,819 cP
- viscosity (1:1) Part A: 3,238 cP
- viscosity (1:1) Part B: 3,819 cP
Application Methods:
Thoroughly mix Part A with Part B in a 1:1 ratio. De-air mix under vacuum for about 20 minutes. The pot-life is >4 hours at 25 °C. Pot-life may be extended by storing at 5 °C. Pour into mold or apply to substrate. Avoid entrapping air. Cure at 55 °C for 4 hours or at higher temperatures. Higher temperature cure allows for shorter cure times.