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QSil 220



QSil 220 is a two-part, clear, liquid silicone which will cure at elevated temperatures.  It has a low viscosity which allows for ease of  flow around complex parts, providing electrical insulation and shock resistance. The chemical composition provides hydrolytic and reversion resistance.  This material also has excellent, primerless adhesion to most substrates.


  • Convenient 10:1 mixing ratio for use in automatic dispensing equipment or hand mixing
  • Contains no solvents
  • Non-yellowing catalyst system
  • Heat cure to obtain full properties and adhesion
  • UL 94 HB listed, control number: QMFZ2.E205830


Download: A Study on the Physical Properties of QSil 220 – a Silicone Potting Compound


SPECIFICATIONS (typical properties)

Durometer : 29, Shore A
Tensile Strength : 450 psi
Refractive Index : 1.406
Elongation : 200 %
Viscosity : 4,100 cps
Mix Ratio : 10:1
Gel Time : > 24 hours
Color : Clear
Specific Gravity : 1.02