Sikaflex®-1A
Sikaflex®-1A is a premium-grade, high-performance, moisture-cured, 1-component, polyurethane-based, non-sag elastomeric sealant. Sikaflex®-1A can be used in green and damp concrete applications.
- Eliminates time, effort, and equipment for mixing, filling cartridges, pre-heating or thawing, and cleaning of equipment
- Fast tack-free and final cure times
- High elasticity - cures to a tough, durable, flexible consistency with exceptional cut and tear resistance
- Stress relaxation
- Excellent adhesion - bonds to most construction materials without a primer
- Excellent resistance to aging, weathering
- Proven in tough climates around the world
- Applicable to green concrete 24 hours after pour
- Applicable to damp concrete 1 hour after getting wet
- Non-staining
- Jet fuel resistant
- Urethane-based; suggested by EPA as a caulk and crack sealant for radon reduction
- Paintable with water-, oil- and rubber-based paints
- Capable of ±35 % joint movement
Usage
- Designed for all types of joints where maximum depth of sealant will not exceed 13 mm (1/2 in)
- For small joints and fillets, windows, door frames, reglets, flashing, common roofing detail applications, and many construction adhesive applications
- For vertical and horizontal joints; readily placeable at 4 °C (40 °F)
- As an elastic adhesive between materials with dissimilar coefficients of expansion
- In submerged conditions, such as canal and reservoir joints
Advantages
- Eliminates time, effort, and equipment for mixing, filling cartridges, pre-heating or thawing, and cleaning of equipment
- Fast tack-free and final cure times
- High elasticity - cures to a tough, durable, flexible consistency with exceptional cut and tear resistance
- Stress relaxation
- Excellent adhesion - bonds to most construction materials without a primer
- Excellent resistance to aging, weathering
- Proven in tough climates around the world
- Applicable to green concrete 24 hours after pour
- Applicable to damp concrete 1 hour after getting wet
- Non-staining
- Jet fuel resistant
- Urethane-based; suggested by EPA as a caulk and crack sealant for radon reduction
- Paintable with water-, oil- and rubber-based paints
- Capable of ±35 % joint movement
Packaging
300 mL (10.1 US fl. oz) cartridge, 24/case
600 mL (20 US fl. oz) sausage, 20/case
Colour
White, colonial white, aluminum grey, limestone, black, dark bronze, capitol tan, stone and medium bronze. Special architectural colours on request.
Product Details
APPROVALS / CERTIFICATES
- Meets Federal Specification TT-S-00230C, Type II, Class A.
- Meets ASTM C920, Type S, Grade NS, Class 35, Use T, NT, O, M, A, I. Canadian standard CAN/CGSB 19.13-M87.
- SWRI validated acc. to ASTM C719 (No. 0123-S0128)
- Federal specification TT-S-00230 C Type II, Class A
- Canadian Standard CAN/CGSB 19.13-M87
- Certified to NSF/ANSI/CAN 61 for potable water (meets applicable requirements of NSF/ANSI 600).
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Shelf Life
- Cartridge: 15 months in original, unopened packaging
- Sausage: 18 months in original, unopened packaging
Storage Conditions
Store between 4 and 35 °C (40 and 95 °F).
Volatile organic compound (VOC) content
Refer to Product Safety Data Sheet.
Shore A Hardness
| 45±5 (21 days) | (ASTM C661) |
Tear Strength
| 9.6 N/mm (55 lb/in) | (ASTM D624) |
Movement Capability
| ±35 % | (ASTM C719) |
Chemical Resistance
Good resistance to water, diluted acids, and diluted alkalines. Contact Sika Canada Technical Service for specific data.
Resistance to Weathering
Excellent
Service Temperature
−40 °C to +77 °C (-40 °F to 170 °F)
Adhesion in Peel
| Substrate | Peel Strength | Adhesion loss |
| Concrete | 3.5 N/mm (20 lb) | 0 % |
| Aluminium | 3.5 N/mm (20 lb) | 0 % |
| Glass | 3.5 N/mm (20 lb) | 0 % |
Tensile Stress at Specified Elongation
| 21 day Tensile Stress | 1.21 MPa (175 psi) |
| Stress @ 100 % | 0,59 N/mm2 (85 psi) |
Application
Product Temperature
Product Conditioning: 18 °C – 24 °C (65 °F – 75 °F) before using. Note that for cold weather applications, Sikaflex®-1A must be conditionned at approximately 21 °C (70 °F).
Ambient Air Temperature
Recommended application temperatures: 4 °C – 38 °C (40 °F – 100 °F). Note that for cold weather applications, Sikaflex®-1A must be conditionned at approximately 21 °C (70 °F).
Curing Time
4 to 7 days
Curing Rate
Up to 3 mm (1/8 in) after 24 hours
Tack-free time
3 to 6 hours
Yield
300 mL (10.1 oz) Cartridge: Yield in Linear Feet
| Width/Depth - mm (in) | 6 (1/4) | 9.5 (3/8) | 13 (1/2) |
| 6 (1/4) | 24.3 | ||
| 9.5 (3/8) | 16.2 | 10.8 | |
| 13 (1/2) | 12.1 | 8.1 | 6.1 |
| 19 (3/4) | 8.1 | 5.4 | 4.0 |
| 25 (1) | 3.0 | ||
| 32 (1 1/4) | 2.4 | ||
| 38 (1 1/2) | 2.0 |
600 mL (20 oz) Sausage: Yield in Linear Feet
| Width/Depth - mm (in) | 6 (1/4) | 9.5 (3/8) | 13 (1/2) |
| 6 (1/4) | 48.1 | ||
| 9.5 (3/8) | 32.1 | 21.4 | |
| 13 (1/2) | 24.1 | 16.0 | 12.0 |
| 10 (3/4) | 16.0 | 10.7 | 8.0 |
| 25 (1) | 6.0 | ||
| 32 (1 1/4) | 4.8 | ||
| 38 (1 1/2) | 4.0 |
SUBSTRATE PREPARATION
All joint surfaces must be clean, sound, and frost-free. Joint walls must be free of oils, tar, asphalt, bitumen, grease, paints, coatings, sealers, curing compound residues, and any other foreign matter that might prevent adhesion. Ideally, substrate preparation and foreign matter removal should be accomplished by mechanical means. A roughened surface will also enhance bond. Install bond breaker tape or backer rod to prevent bond at base of joint. Priming is not usually necessary. Most substrates only require priming if testing indicates a need or where sealant will be subjected to water immersion after cure.
For green concrete applications control joints must be cut eight (8) hours prior to sealant installation and in expansion joint forms must be removed four (4) hours prior to sealant installation. For wet concrete applications, all excess or standing water must be displaced and concrete must then dry for a minimum of 60 minutes prior to sealant application. Refet to Sikaflex® Primer Technical Data Sheet or contact Sika Canada Technical Service for additional information on priming.
CLEAN UP
Uncured material can be removed from equipment and tools using Sika Cleaning Wipes or a solvent, such as xylene. Strictly follow solvent manufacturer’s warnings and instructions for use. Cured material can only be removed manually or mechanically.
