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Sika Silicone Sealants

Sika Silicone Sealants & Adhesives

Sika Sikasil Building Silicones High Quality Silicone Sealants

Sikasil products are high performing silicone sealants and adhesives for use in joint sealing and assembly bonding, for a variety of standard and specialty applications in Transportation, Marine, Fenestration, Flat Glass and Appliances and Components markets.

The Sikasil product range offers solutions for sealing and bonding in the manufacturing environment including the assembly of trucks, trailers, buses and RVs, specialty vehicles, leisure marine craft, windows and doors, HVAC and industrial equipment components, and appliances and white goods. Sikasil is equally versatile for use in the numerous application requirements for field installation work, such as sealing in ship building and repair work, marine leisure craft maintenance, perimeter sealing of windows, doors and skylights in metal buildings, manufactured and log homes and much more.

Sikasil products can be used on a variety of materials. Sikasil adhesives and sealants are appreciated for their ease-of-use, fast-curing properties, the strong bonds they create and for their permanent elasticity.

The benefits of Sikasil include:
Extremely long service life
Superior adhesion to glass and nonporous surfaces
Excellent flexibility for dynamic joint movement
Durable protection for moving joints
UV Resistance


Sikasil GP: General Purpose Acetoxy Cure Silicone
Sikasil GP is a general purpose, one-component, non-sag, elastomeric, RTV acetoxy silicone sealant with good adhesion characteristics for general sealing and bonding applications. Sikasil GP maintains elastomeric properties up to 350° F continuous, 392°F intermittent. Certified to NSF/ANSI Std. 51 (Food Equipment Materials).

Sikasil WS-290: Ultra Low Modulus Neutral Cure Weatherseal Silicone
Sikasil WS-290 is a one-part, neutral-curing, ultra low-modulus, low to no bleed silicone sealant that cures to a durable, flexible building sealant Sikasil WS-290 performs exceptionally well under dynamic conditions due to its ultra-low modulus, high extension/compression, recovery properties and strong adhesion to most building materials. Sikasil WS-290 accommodates long-term movement of +100/-50 % in properly designed joints and is particularly well suited for use in Exterior Insulation Finish Systems (EIFS). Meets the requirements of ASTM C-920, Type S, Grade NS, Class 100/50, Use NT, M, G, A, O; TT-S-00230C, Type II, Class A; TT-S-001543A, Class A; CAN/CGSB-19.13-M87.

Sikasil WS-295: Medium Modulus Neutral Cure Weatherseal and Structural Silicone Sealant / Adhesive
Sikasil WS-295 sealant is a one part, neutral cure for use in most common weatherproofing applications on a wide variety of materials. Meets the requirements of ASTM C920, Type S, Grade NS, Class 50, Use NT, M, G, A, O; TT-S-00230C, Type II, Class A; CAN/CGSB-19.13-M87

Sikasil WS-305 AM: Neutral-curing silicone weatherproofing sealant
Sikasil WS-305 AM is a neutral curing silicone sealant with high movement capability and excellent adhesion to a wide range of substrates. It is particularly suited as a weather seal for curtain walls and windows. Sikasil WS-305 AM is typically used for weather sealing curtain walls and glass butt joints or as a perimeter weather seal for windows, doors, and window walls.

Specifications and Approvals

Sikasil silicone sealants meet the following specifications and approvals:

  • ASTM C920
  • Federal Specifications - TT-S-00230C
  • AAMA
  • SWRI Validated
  • VOC Compliant (CARB, SCQAMD)
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  1. Sika Sikasil WS-290 FPS White Base 1.5 Gallon Pail
    $288.58
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