Circalok™ 6403 A SLW / B Urethane Encapsulant Where to Buy
Product Information
LORD Circalok™ 6403 A SLW/B urethane encapsulant is a general purpose, two-component urethane designed for applications requiring a fast cure, mechanical shock-resistant system. Circalok 6403 A SLW/B urethane encapsulant does not contain MOCA or TDI.
Shelf Life
Shelf life of each component is six months from date of manufacture when stored at 25-40°C in original, unopened container.
If stored or shipped at cooler temperatures, Circalok 6403 B hardener may crystallize. If crystals appear, gently warm hardener at 50-60°C to melt crystals before mixing with resin.
Features and Benefits
Low Viscosity – maintains low viscosity for complete and void-free encapsulation.
Environmentally Resistant – provides excellent protection and resistance to moisture; exhibits excellent hydrolytic stability.
Electrically Insulative – provides excellent electrical insulation properties.
Broad Temperature Range – can be used on parts and devices that experience operating temperatures from -50°C to +120°C.
Uncured Typical Properties*
| Mixed Appearance | Amber Liquid |
| Mixed Viscosity, cps @ 27°C | 900 |
| Mixed Specific Gravity | 1.04 |
| Gel Time, min | 10 - 15 |
Cured Typical Properties*
| Volume Resistivity, ohm-cm @ 25°C | 1 x 1014 |
| Hardness, Shore A | 80 |
| Tensile Strength, psi | 1935 |
| Dielectric Strength, V/mil | 600 |
| Dielectric Constant, @ 25°C | 3.6 |
| Dissipation Factor, @ 25°C | 0.14 |
*Data is typical and not to be used for specification purposes.
Literature
| Download | Type | Name | |
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| Safety Data Sheet | CIRCALOK 6403 A AMBER SLOW | |
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| MSDS (US) | Circalok 6403 B | |
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| Safety Data Sheet | CIRCALOK 6403 A AMBER SLOW | |
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Product Catalog | Potting & Encapsulation Materials | |
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Technical Data Sheet | Circalok 6403 A SLW / B Urethane Encapsulant |