Ultra Low Modulus - Neutral Cure Silicone - Sealant
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.
- Unaffected by most atmospheric conditions
- Excellent adhesion
- Excellent gunnability in all temperatures
- Ultra low Modulus.
Sikasil WS-290 silicone sealant is designed primarily for sealing expansion and control joints in precast concrete panels, architectural stones, metal curtainwalls, perimeter sealing of doors and windows, Exterior Insulation Finish Systems (EIFS) and numerous other areas requiring a high-performance sealant.
HOW TO USE IT
Sikasil WS-290 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 contact Technical Service for additional information.
Surface 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.
Application: The depth of the sealant should be 1/2 the width of the joint. The maximum depth is 1/2 inch (13mm) and the minimum is 1/4 inch (6mm). To control joint depth, use closed cell polyethylene, non-gassing polyolefin or open cell polyurethane backer rod. If joint depth does not allow for backer rod, use polyethylene bond breaker tape to prevent three-sided adhesion. Closed cell backer rod should be 25% larger than joint width; do not compress more than 40%. Open cell should be compressed 40%. Do not use open cell rod in horizontal on grade joint or with E.I.F.S. When installing during time of large temperature swings such as spring or fall, and in joints designed for movement greater than ± 25 %, be aware of the significant joint movement before cure, may cause aesthetic issues such as ripples in the sealant surface. Performance will not be affected. Ready to use, apply using professional caulking gun. Do not open product container until preparation work has been completed. Apply sealant using consistent, positive pressure to force sealant into the joint. Tool sealant to create a concave joint shape and maximum adhesion. Dry tooling is recommended.
Tooling and finishing: All joints should be masked to ensure a neat appearance and prevent sealant applied outside the joint. Place nozzle of the gun into bottom of joint and fill entire joint making complete contact with joint sides. Keep the nozzle in the sealant, continue with a steady flow of sealant preceding the nozzle to avoid air entrapment. Tool the sealant slightly concave using dry-tooling techniques. Do not tool with soap or detergent and water solutions.
Do not Use: Do not apply to surfaces that will be painted as sealant surface will not hold paint. Do not apply to damp or wet substrates. Do not allow sealant to come in contact with solvent during cure. Do not allow sealant to come in contact with curing polyurethane sealants during cure. Not intended for immersion.
Caution: Do not apply when substrate temperatures are below -20°F or above 130°F. Not recommended for horizontal vehicular traffic. Not intended for structural glazing. Sealant may be applied below freezing temperatures if substrates are completely dry, frost free and clean.
Storage: Store in unopened containers at temperatures lower than 80°F (27°C). Store in a well-ventilated place. Keep cool.
Note: Do not use spray water or other liquids when tooling. Brass and copper may be discolored. Test apply prior to application. Lower temperature and humidity will extend tack free and cure rates. Results may differ based upon statistical variations depending upon mixing methods and equipment, temperature, application methods, test methods, actual site conditions and curing conditions.
Glass, tile, fiberglass, plastic, ceramic, wood and painted metals
|PRODUCT SIZES:||10.1 oz (cartridges).||TACK-FREE TIME:||50 min.|
|SHEER STRENGTH:||42 psi (0.29 MPa)||ELONGATION:||1000 %|
|APPLICATION TEMPERATURE:||-80°F to 350°F.||CURE TIME:||7 - 14 dyas.|
|PRODUCT FORM:||Solid (Paste).||PROJECTS:||Commercial. Residential.|
Product View - Custom Info
This is a custom CMS block. You can use it to display information about shipping, returns, refunds, latest promotions etc. Put any content you want here, like text, HTML or images. There are many useful blocks like this one across the theme. All CMS blocks are editable from the admin panel.
Shipping: Please allow about 5-10 business days for delivery. For delivery to Alaska or Hawaii, please allow 10-15 days for delivery. For delivery to PO Boxes in Alaska, Hawaii, US Territories and APO/FPO addresses, allow three weeks for delivery.
Backorders: All backordered items will be shipped via Standard Delivery service at no additional charge.
Returns Policy: You may return new, unworn or unused products within thirty (30) days of delivery for a full refund of the cost of the goods, or an exchange if preferred.