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UK Converters & Distributors of Technical Adhesive Tapes, Foams, Films & Membranes

Sikasil WS605s

Durable, neutral-curing silicone sealant with a high movement capability and excellent adhesion to a wide range of substrates.

Outstanding Resistance to UV & Weathering

WS605S is a premium silicone sealant used for weather sealing applications where durability under severe conditions is required.

WS-605 S is particularly well suited as a weather seal for structural glazing, curtain walling, facades and windows. e.g. for capping structural glazing joints, Marine sealing applications. 

High Movement Capability + or - 50%

sikasil ws605s high performance weatherproofing sealantSikasil WS605S is a durable, neutral curing silicone sealant with excellent adhesion to a wide range of substrates


Sikasil WS-605-S ® adheres well to glass, metals, (including coated & painted metals), plastics and wood.


  • Application Temperature: 5°C to 40 °C
  • Service Temperature: -40°C to 150 °C

Sikasil WS605s Benefits & Approvals

  • Meets requirements of ISO 11600 25 LM F & G ASTM C 920 (class 50) ASTM C 1248 TT-S00230C TT-S001543A DIN 18540 DIN 18545 (group E)
  • Outstanding UV and weathering resistance
  • Does not stain areas adjacent to the joint
  • Adheres well to glass, metals, coated / painted metals, plastics and wood
  • Provided with CE-mark according to; EN 15651-1:2012 F EXT-INT CC 25LM (F EXT-INT 25LM for transparent) EN 15651-2:2012 G CC 25LM Certified by Control Body 1119

Sika ® In-House Testing & Warranties

Sika actively encourage pre-installation testing. Testing of your substrate & application for suitability & compatibility.

Testing, training & warranties can all be provided directly from Sika through Lynvale.


Sika Ws605s is available in 600ml Foils / 20 per Box (MOQ 1 Box)

Smaller quantities can be placed directly with our online distributors;