Electronic & Electrical


CSL557/558/559 Flame Retardant Silicone Sealant

CSL557/558/559 Flame Retardant Silicone Sealant

When resistance to burning is a design requirement.


CSL559 is a one-part, moisture curing, room-temperature vulcanizing 100% silicone sealant of high strength, adhesion and durometer and exhibits excellent scratch resistance and durability.

CSL559 does not generate acetic acid or other corrosive by-products during cure, making it ideal for use in corrosion-sensitive electronic equipment with no adverse effects.

CSL559 has a wide heat stability range from -40°C to 250°C (-40°F to 482°F).

CSL559 has excellent resistance to weathering including ozone, ultraviolet radiation and airborne chemicals.

CSL559 also provides excellent resistance to vibration and shock and severe weathering conditions.


  • Neutral cure formulation
  • Superior flame retardancy
  • UL® 94-V0 rating
  • Adheres to most substrates without primer
  • Excellent electrical insulation properties
  • High strength and durability
  • Scratch resistant

CSL559 can be used in electronic, appliance, transportation and in industries where resistance to burning is a significant design requirement. The non-corrosive curing system makes it ideally suited for protecting, sealing and insulating corrosion sensitive electrical and electronic materials.


  • Flame retardant and unaffected by extreme temperatures
  • Resists moisture,vibration, mechanical and thermal shock
  • Non-corrosive





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