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Chemically Resistant adhesives
Lord Adhesives Thermosetâ„¢ SC-303 Silicone Encapsulant, Flame Retardant
Categories: Polymer; Thermoset; Silicone; Silicone, RTV, Encapsulation Grade

Material Notes: Lord SC-303 is a two component silicone elastomer that provides excellent thermal conductivity, while retaining the other desirable properties associated with silicones. It is a low viscosity, easily pourable liquid that is ideally suited for electrical/electronic potting applications. It has excellent high heat performance, thermal shock resistance, and improved coefficient of expansion.

Lord SC-303 has been formulated for flame retardancy and is an Underwriters Laboratories recognized material under the Components-Plastics classification as 94V-0 at 0. 250 inches.

Lord SC-303 resin is white and the hardener is gray. These colors act as mix indicators. When thoroughly mixed, SC-303 is lighter gray.

Lord SC-303 is addition curing. It will not depolymerize when heated in confined spaces as do many condensation curing silicones. As with all silicones, SC-303 generates no exotherm as it cures. It also exhibits low shrinkage and stress on components as it cures. Lord SC-303's cure may be accelerated with elevated temperature.

All information provided by Lord.

Available Properties
  • Specific Gravity, STM 2
  • Water Absorption, ASTM D570-81
  • Viscosity, STM 1
  • Hardness, Shore A, ASTM D2240
  • Tensile Strength, Yield, ASTM D412
  • Elongation at Yield, ASTM D412
  • Volume Resistivity, ASTM D257
  • Dielectric Constant, ASTM D150
  • Dielectric Strength, ASTM D149
  • Dissipation Factor, ASTM D150
  • CTE, linear, ASTM D864, Calculated from Volume CTE
  • Thermal Conductivity, Hot Disc Transient Method
  • Maximum Service Temperature, Air
  • Minimum Service Temperature, Air
  • Flammability, UL94
  • Cure Time
  • Cure Time
  • Cure Time
  • Pot Life, 100 grams
  • Shelf Life
Property Data

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Chemically Resistant adhesives
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