Sika® Silbridge-400
Sika® Silbridge-400 is a pre-formed ultralow modulus elastomeric silicone seal for flashing and transition applications for weatherproofing against air and water infiltration. Sika® Silbridge-400 is usually bonded to substrates using Sikasil® WS-305 AM.
- Ease of installation and quality control
- Capable of sealing high movement transition joints
- Highly resistant to ultraviolet exposure and weathering
- Wide operational temperature ranges
- Non-corrosive and high corrosion resistance
PRODUCT BENEFITS
- Ease of installation and quality control
- Capable of sealing high movement transition joints
- Highly resistant to ultraviolet exposure and weathering
- Wide operational temperature ranges
- Non-corrosive and high corrosion resistance
Usage
Sika® Silbridge-400 preformed silicone strips are specifically designed for a variety of applications that include, but are not limited to, the following:- Window perimeter joint seals
- Bridging between window and/or curtain wall
- Sealing air and weather barriers to adjacent curtain walls, store fronts and windows
Packaging
Sika® Silbridge-400 is sold in 100 ft rolls that are available in 3 in, 4 in, 6 in and 8 in widths. Contact your local Sika sales representative or distributor for detailed information about available size options.
Product Details
| Chemical base | Elastomeric silicone | |
| Color (CQP001-1) | Translucent | |
| Thickness | 1.1 mm (0.04 in) | |
| Shore A hardness (ASTM D2240) | 40 | |
| Tensile strength (ASTM D412) | 5 MPa (720 psi) | |
| Elongation at break (ASTM D412) | 300 % | |
| Tear strength (ASTM D624) | 8 N/mm (45 pli) | |
| Service temperature (CQP513-1) | -40 ─ 150 °C (-40 ─ 300 °F) | |
| Shelf life (CQP016-1) | 24 months A |
| CQP = Corporate Quality Procedure | A) unopened container stored at < 25 °C (77 °F) |
CHEMICAL RESISTANCE
In case of chemical exposure concerns conduct project related testing.
Application
Surface Preparation
Porous surfaces must be cleaned with dry, oil free compressed air. Grinding or abrasion may be necessary to remove materials that may interfere with the Sikasil® WS-305 AM. If the substrate is cleaned with pressurized water, use caution to prevent water from entering the structure through the open joint. Ensure that all cleaning agents are completely removed and allow the substrate to adequately dry before applying the Sikasil® WS-305 AM and the Sika® Silbridge-400 strip. Make sure to follow sealant adhesion guidelines of Sikasil® WS-305 AM product data sheet. Non-porous surfaces must be cleaned with an appropriate solvent using the two-cloth method.
Application
Apply a bead of Sikasil® WS-305 AM in a straight line near the outside edge to be covered by Sika® Silbridge-400. Allow enough space for Sikasil® WS-305 AM to squeeze out to the edge of the extrusion and then stop. Depending on the uniformity of the substrate, it is recommended that a 3 mm to 6 mm (1/8 to 1/4 in) diameter bead of Sikasil® WS-305 AM be applied. Non-porous surfaces such as glass or aluminum require less Sikasil® WS-305 AM, porous substrates such as stucco or EIFS require more.
Next, unroll the appropriate length of Sika® Silbridge-400 strip and place it uniformly spaced over the joint to be sealed. To ensure uniform appearance, a flat piece of styrofoam can be used to press the extrusion firmly into place. If the application is on a smooth surface, a roller may be used to ensure a uniform wet-out of Sika® Silbridge-400 along with the Sikasil® WS-305 AM.
Clean or tool off any excess sealant adhesive from the edges of the extrusion and substrate. Trim ends and terminate with a bead of sealant.
Always apply horizontal joints before vertical joints. At intersections simply overlap the vertical Sika® Silbridge-400 strip over the horizontal and ensure a proper seal by applying enough Sikasil® WS-305 AM.
Application Limits
Sika® Silbridge-400 profile shall not be used under the following conditions:
- Below grade or below water line applications
- Joints where physical abrasion and abuse may occur, such as traffic joints
- In association with building materials that bleed oils, plasticizers or other material
- Do not coat with non-silicone-based coatings