Sikasil® WS-295 FPS
Sikasil® WS-295 FPS sealant is a field pigmentable, no bleed, one component plus color pack, non-sag elastomeric, neutral cure silicone sealant 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; TTS-00230C, Type II, Class A; CAN/CGSB-19.13-M87
- One-part plus color pack
- Unaffected by most atmospheric conditions
- Excellent resistance to UV and Ozone exposure
- Non-staining on most porous substrates
- Joint movement ± 50 %
- Excellent adhesion to most substrates and surfaces
- Excellent gunnability in all temperatures
Usage
Sikasil® WS-295 FPS silicone sealant has been specifically designed for:- As a weatherseal in conventional glazing, including cap, toe and heel beads.
- As a weatherseal in glass to glass butt joint glazing.
- Sealing expansion and control joints in precast concrete panels and metal curtain walls.
- Perimeter sealing of doors, windows and other building components.
- Adhering stiffeners to building panels.
- Excellent for use in unitized curtain wall systems.
- Mixed in the field with Sikaflex® / Sikasil® Universal Color-Pak.
Advantages
- One-part plus color pack
- Unaffected by most atmospheric conditions
- Excellent resistance to UV and Ozone exposure
- Non-staining on most porous substrates
- Joint movement ± 50 %
- Excellent adhesion to most substrates and surfaces
- Excellent gunnability in all temperatures
Packaging
1.5 gal pails (5.7 L), Sikaflex® / Sikasil® Universal Color-Pak sold separately
Color
Universal Color Chart with 50+ field pigmentable color options.
Custom colors available on request.
Product Details
APPROVALS / STANDARDS
- Meets the requirements of ASTM C920, Type S, Grade NS, Class 50, Use NT, M, G, A
- SWRI validated acc. to ASTM C719 (No. 123-SIK295)
- Federal specification TT-S-00230C, Type II, Class A
- Canadian Standard CAN/CGSB 19.13-M8
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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
37 g/l
Shore A Hardness
| 25 | (7 days at 77 °F (25 °C) and 50 % R.H.) (ASTM C-661) |
Tensile Strength
| 200 psi (1.38 MPa) | (7 days at 77 °F (25 °C) and 50 % R.H.) (ASTM D-412) |
Tensile stress at specified elongation
| 55 psi (0.38 MPa) at 100 % | (7 days at 77 °F (25 °C) and 50 % R.H.) (ASTM D-412) |
Movement Capability
| +/-50 % | (7 days at 77 °F (25 °C) and 50 % R.H.) (ASTM C-719) |
Tensile Adhesion Strength
| Reaches full adhesion in 7-14 days |
Adhesion in peel
| 30 pli on aluminum, glass and concrete | (7 days at 77 °F (25 °C) and 50 % R.H.) (ASTM C-794) |
Service Temperature
-80–350 °F (-62–176 °C)
UV Exposure
| Excellent | (ASTM D-1149) |
Resistance to Weathering
Excellent
Color
| Staining, Color Change | None |
| Staining on Porous Substrates | No staining |
Application
Sag Flow
| no sag | (at 77 °F (25 °C) and 50 % R.H.) (ASTM C-639) |
Cure Time
| Tack Free Time | 50 min. |
| Cure Time | 7-14 days |
| Full Adhesion | 7-14 days |
Tooling Time
| 20–30 minutes | (at 77 °F (25 °C) and 50 % R.H.) |
Coverage
1.5 gallon (5.7 L) Pail: Yield in Linear feet
| Width/Depth | 1/4'' | 3/8'' | 1/2'' |
| 1/4'' | 467.8 | ||
| 3/8'' | 307.9 | 205.2 | |
| 1/2'' | 203.8 | 153.9 | 115.5 |
| 3/4'' | 153.9 | 102.6 | 76.9 |
| 1'' | 57.7 | ||
| 1.25'' | 46.2 | ||
| 1.5'' | 38.5 |
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. Strictly follow solvent manufacturer’s warnings and instructions for use.
Priming
Sikasil® WS-295 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 primers Sikasil® Primer-2100 and contact Technical Service for additional information.
MIXING
Cut open Sikaflex® / Sikasil® Universal Color-Pak and pour into pail. Mix using a slow speed drill (400–600 rpm) and a conventional sealant mixing paddle to disperse the color evenly for no more then three minutes, being sure to scrape down the sides during mixing. Avoid air entrapment during mixing.