Silicone Sealants - Sikasil® WS-290 FPS

Ultra low modulus, neutral cure, field pigmentable silicone sealant

Sikasil® WS-290 FPS is a field pigmentable, low to no bleed, low modulus, one-component plus color pack, non-sag, elastomeric, neutral cure silicone sealant. Sikasil® WS-290 FPS 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 FPS 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, AAMA 808.3.

• Field pigmentable sealant
• Unaffected by most atmospheric conditions
• Non-staining
• Joint movement +100/-50 %
• Excellent adhesion
• One-component, plus color pack
• Excellent gunnability in all temperatures
• Ultra low Modulus

Usage

Sealing expansion and control joints in precast concrete panels and metal curtain walls.

• As a weatherseal in glass to glass butt joint glazing
• As a weatherseal in nonstructural glazing applications, including cap, toe and heel beads
• Exterior Insulation Finish Systems (EIFS) and numerous other areas requiring a high-performance sealant

Advantages

• Field pigmentable sealant
• Unaffected by most atmospheric conditions
• Non-staining
• Joint movement +100/-50 %
• Excellent adhesion
• One-component, plus color pack
• Excellent gunnability in all temperatures
• Ultra low Modulus

Packaging

1.5 gal pails (5.7 L), Silicone color packs sold separately

Color

White, Colonial White, Aluminum, Limestone, Black, Bronze, Medium Bronze. Custom colors available on request.

Product Details

Product Information

Shelf Life

12 months in original unopened pails.

Storage Conditions

Store in unopened containers at temperatures lower than 80 °F (27 °C)

Volatile organic compound (VOC) content

29 g/L

Service Temperature

-80-350 °F (-62.2- 176.6 °C)

Application

Application Steps

SUBSTRATE PREPARATION

The substrate must be clean, dry, frost free, sound and free of any oils, greases or incompatible sealers, paints or coatings that may interfere with adhesion.

POROUS SUBSTRATES - clean by mechanical methods to expose a sound surface free of contamination and laitance.
NON-POROUS SUBSTRATES - for cleaning non-porous substrates, use two rag wipe method using xylene or an approved commercial solvent. Allow solvent to evaporate prior to sealant application.

Priming

Sikasil® WS-290 FPS is designed to obtain adhesion without the use of a primer; however, certain substrates may require a primer. Test by applying the sealant and/or primer sealant combination to confirm results and proposed application methods. Refer to Technical Data Sheet for Sikasil Primer-2100 and/or contact Technical Service for additional information.

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