Sikaflex® Concrete Fix
Sikaflex® Concrete Fix is a moisture-cured, one-part, non-sag and elastomeric polyurethane sealant.
- Excellent adhesion – bonds to most construction materials without a primer
- High elasticity – cures to a durable, flexible consistency with exceptional cut and tear-resistance
- Stress relaxation to prevent splitting at edges
- Capable of ±25 % joint movement
- Non-staining, protecting architectural and decorative materials from spoiling
- Urethane-based; suggested by EPA for radon reduction
- Paintable with water-, oil- and rubber-based paints
- Excellent resistance to aging, weathering
Usage
- Weatherproofing joints, cracks and gaps in concrete, brickwork, blockwork, masonry, stucco and metal
- For all types of joints and cracks where maximum depth of sealant will not exceed 13 mm (½ in)
- Suitable for vertical and horizontal applications
- As an elastic sealant between materials with dissimilar rates of expansion and contraction
- Joints in walls, floors, balconies and around window or door frames
- Waterproofing of expansion joints and joints or intersections in roofs
Advantages
- Excellent adhesion – bonds to most construction materials without a primer
- High elasticity – cures to a durable, flexible consistency with exceptional cut and tear-resistance
- Stress relaxation to prevent splitting at edges
- Capable of ±25 % joint movement
- Non-staining, protecting architectural and decorative materials from spoiling
- Urethane-based; suggested by EPA for radon reduction
- Paintable with water-, oil- and rubber-based paints
- Excellent resistance to aging, weathering
Packaging
300 mL (10.1 US fl. oz) moisture-proof and disposable composite cartridges, 12/case
Colour
Limestone
Product Details
ENVIRONMENTAL INFORMATION
Conformity with LEED®v4 EQ Credit: Low-Emitting Materials
APPROVALS / CERTIFICATES
- Meets Federal specification TT-S-00230C, Type II
- Meets ASTM C920, Type S, Grade NS
Shelf Life
12 months in original unopened packaging.
Storage Conditions
Store between 4 to 35 °C (40 to 95 °F). Condition material between 18 to 24 °C (65 to 75 °F) before using.
Shore A Hardness
Meets ASTM C920
Adhesion in Peel
| Concrete | Meets ASTM C920 |
| Aluminum | Meets ASTM C920 |
| Glass | Meets ASTM C920 |
Chemical Resistance
Good resistance to water, diluted acids, and diluted alkalines.
Consult Sika Canada for specific data.
Resistance to Weathering
Excellent
Service Temperature
-40 to 77 °C (-40 to 170 °F)
Application
Ambient Air Temperature
4 to 38 °C (40 to 100 °F)
Substrate Temperature
4 to 38 °C (40 to 100 °F). Sealant should be installed when joint is at mid-point of its designed expansion and contraction.
Curing Rate
| Tack-free time | Meets ASTM C920 |
| Final cure | 7 days |
Yield
One (1) cartridge seals 3.72 lin. m (12.2 lin. ft) of a 13 mm (½ in) wide by 6 mm (¼ in) deep joint.
SUBSTRATE PREPARATION
Clean all contact surfaces within joints, cracks or gaps being sealed. Surfaces must be sound, clean, dry, and free from frost, oil and grease and any contaminants. Install bond breaker tape or backer rod to prevent bond at the rear face of joints. Where cracks are to be sealed they must be ground out and blown free of all friable material to establish suitably wide and sound locations.
Priming
Priming is not usually necessary. Most substrates only require priming if testing indicates a need or where the sealant will be subjected to water immersion after cure. Consult Sikaflex® Primers Product Data Sheet for general guidance as to what substrates typically require priming or contact Sika Canada for specific information on priming.
CLEAN UP
Uncured material can be removed with approved solvent. Cured material can only be removed mechanically.
FAQ
The Sikaflex® Concrete Fix has a high elasticity, cures to a durable, flexible consistency with exceptional cut and tear resistance and an excellent resistance to aging, weathering.
Allow 1-week cure at standard conditions when using Sikaflex® Concrete Fix in total water immersion situations and prior to painting. When over-coating with water-, oil- and rubber-based paints, compatibility and adhesion testing is essential.
Maximum expansion and contraction should not exceed 25 % of average joint width.
Since the system is moisture-cured, permit sufficient exposure to air. Do not apply when moisture-vapour-transmission condition exists from the substrate as this can cause bubbling within the sealant. And avoid overlapping sealant to eliminate entrapment of air. Tool as necessary, dry or with clean water.
For use in horizontal joints in traffic areas, the absolute minimum depth of the sealant is 13 mm (½ in), and a closed cell backer rod is recommended. Place nozzle of gun into bottom of the joint and fill entire joint. Keep the nozzle in the sealant, continue with a steady flow of sealant preceding the nozzle to avoid air entrapment.
For best performance, Sikaflex® Concrete Fix should be gunned into joints when they are at the mid-point of their designed expansion and contraction. Joint dimension should allow for 6 mm (¼ in) minimum and 13 mm (½ in) maximum thickness for sealant. Proper design is 2:1 width to depth ratio.
One (1) cartridge seals 3.72 lin. m (12.2 lin. ft) of a 13 mm (½ in) wide by 6 mm (¼ in) deep joint.
The service temperature is between -40 °C to +77 °C (-40 to 170 °F) and the recommended application temperature is between 4°C to +38 °C. For cold weather application, condition units at approximately +21 °C (70 °F).