Sikaflex® + Construction Sealant
Sikaflex® + Construction Sealant is a moisture-cured, 1-component, polyurethane-based, non-sag elastomeric sealant.
- High elasticity – cures to a tough, durable, flexible consistency with exceptional cut and tearresistance
- Stress relaxation
- Can be applied to green/new concrete 24 hours after cure
- Can be applied on concrete that has been wet 1 hour after water source has stopped
- Excellent adhesion – bonds to most construction materials without a primer
- Excellent resistance to aging, weathering
- Non-staining
- Urethane-based; suggested by EPA for radon reduction
- Paintable with water, oil and rubber-based paints (see limitations)
- Capable of ±35 % joint movement
Usage
- Designed for all types of joints where maximum depth of sealant will not exceed 12.7 mm (1/2”).
- Suitable for vertical or horizontal joints.
- Has many applications as an elastic sealant between materials with dissimilar coefficients of expansion.
- Weatherproofing of joints between brickwork, blockwork, masonry, wood and concrete or metal frames
- Sealing joints in walls, floors, balconies, around window or door frames
- Sealing expansion joints
Advantages
- High elasticity – cures to a tough, durable, flexible consistency with exceptional cut and tearresistance
- Stress relaxation
- Can be applied to green/new concrete 24 hours after cure
- Can be applied on concrete that has been wet 1 hour after water source has stopped
- Excellent adhesion – bonds to most construction materials without a primer
- Excellent resistance to aging, weathering
- Non-staining
- Urethane-based; suggested by EPA for radon reduction
- Paintable with water, oil and rubber-based paints (see limitations)
- Capable of ±35 % joint movement
Packaging
300 ml (10.1 fl. oz.), moisture-proof composite cartridges, 12/case
Colour
Aluminum Grey
Product Details
APPROVALS / CERTIFICATES
- ASTM C 920, Type S, Grade NS, Class 35, use NT, T, O, M, G
- Federal specification TT-S-00230 C Type II, Class A
- Canadian Standard CANICGSB 19.13-M87
Environmental:
- LEED® EQc 4.1 SCAQMD
- Rule 1168
- BAAQMD, Reg. 8, Rule 51
Shelf Life
12 months in original, unopened containers
Storage Conditions
Store between 4 and 35 °C (40 and 95 °F). Condition material between 18 and 24 °C (65 and 75 °F) before using
Shore A Hardness
| 40±5 (21 days) | (ASTM C-661) Teasted at: 23 °C (73 °F) 50 % R.H. |
Tensile Stress at Specified Elongation
| 1.21 MPa (175 psi ) (28 days) | (ASTM D-412) Teasted at: 23 °C (73 °F) 50 % R.H. |
Adhesion in Peel
| Substrate | Peel Strength | Adhesion Loss |
| Concrete Aluminum Glass | 9 kg (20 lb.) 9 kg (20 lb.) 9 kg (20 lb.) | 0 % 0 % 0 % |
Tear Strength
| 55 lb./in. | (ASTM D-624) |
Movement Capability
| +/- 35 % | (ASTM C-719) |
Chemical Resistance
Good resistance to water, diluted acids, and diluted alkalines
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). Sealant should be installed when joint is at midrange of its anticipated movement.
Curing Time
Final cure: 5–7 days
Tack-free time
3–6 hrs
Yield
300 ml (10.1 fl. oz) Cartridge: Yield in Linear fleet
| Depth 6.35 mm (1/4") | Depth 9.5 mm (3/8") | Depth 12.7 mm (1/2") | |
| Width | |||
| 6.35 mm (1/4") | 24.3 | ||
| 9.5 mm (3/8") | 16.2 | 10.2 | |
| 12.7 mm (1/2") | 12.1 | 8.1 | 6.1 |
| 19 mm (3/4") | 8.1 | 5.4 | 4.0 |
| 25.4 mm (1") | 3.0 |
SUBSTRATE PREPARATION
Clean all surfaces. Joint walls must be sound, clean, dry, frost-free, and free of oil and grease and any other contaminants. Install bond breaker tape or backer rod to prevent bond at base of joint.
Priming
Priming is not usually necessary. Most substrates only require priming if testing indicates a need. Consult Sikaflex® Primer Product Data Sheet or Technical Service for additional information on priming.
CLEAN UP
Uncured material can be removed with approved solvent. Cured material can only be removed mechanically. For spillage, collect, absorb, and dispose of in accordance with current, applicable local, state, and federal regulations.
FAQ
For best performance, Sikaflex® + Construction Sealant should be gunned into joint when joint slot is at the mid-point of its designed expansion and contraction. Place nozzle of the gun into bottom of the joint and fill entire joint. Keep the nozzle in the sealant, continue on with a steady flow of sealant preceding the nozzle to avoid air entrapment. Avoid overlapping of sealant to eliminate entrapment of air. Tool as required. Joint dimensions should allow for 6.3 mm (1/4 in) minimum and 12.7 mm (1/2 in) maximum thickness for sealant. Proper design is 2:1 width to depth ratio. For use in horizontal joints in traffic areas, the absolute minimum depth of the sealant is 12.7 mm (1/2 in) and closed cell backer rod is recommended. Tool sealant to ensure full contact with joint walls and remove air entrapment. Tool as necessary, dry or with clean water.
In control joints, concrete must be cut 8 hours before applying sealant.
In formed joints, forms must be removed six (6) hours before applying sealant.
Priming is not usually necessary. Most substrates only require priming if testing indicates a need. Consult Sikaflex® Primer Product Data Sheet or Technical Service for additional information on priming.
Clean all surfaces. Joint walls must be sound, clean, dry, frost-free, and free of oil and grease and any other contaminants. Install bond breaker tape or backer rod to prevent bond at base of joint.
Yes, but when over-coating with water, oil and rubber-based paints, compatibility and adhesion testing is essential. Also, do not use paints which are silicone-based or have a high solvent content.
Do not use Sikaflex® + Construction Sealant in contact with bituminous / asphaltic materials.
Use opened cartridges the same day.
Do not cure in the presence of curing silicone sealants.
Final cure: 5–7 days. Note: Curing will vary depending on temperature and humidity.
Recommended application temperatures are 4 to 38 °C (40 to 100 °F). For cold weather application, condition units at approximately 21 °C (70 °F); remove prior to using. Also, Sealant should be installed when the joint is at the mid-range of its anticipated movement.
Sikaflex® + Construction Sealant has a good resistance to water, diluted acids, and diluted alkaline
Sikaflex® + Construction Sealant is capable of ±35 % joint movement.
For wet concrete application, water source must be stopped 1 hour before application and concrete must be free of standing water.
Sikaflex® + Construction Sealant can be applied to green/new concrete 24 hours after the cure.
Maximum width of sealant must not exceed 25.4 mm (1 in.).
For use in horizontal joints in traffic areas, the absolute minimum depth of the sealant is 12.7 mm (1/2 in) and closed cell backer rod is recommended.
Maximum depth of sealant must not exceed 12.7 mm (1/2 in.); minimum depth is 6.3 mm (1/4 in.).