Sikaflex® Construction Sealant
Sikaflex® Construction Sealant is a premium grade, moisture-cured, 1-component, polyurethane-based, non-sag elastomeric sealant.
- 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
- Non-staining
- Urethane-based; suggested by EPA 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)
- Suitable for vertical or horizontal joints
- Has many applications as an elastic sealant between materials with dissimilar coefficients of expansion
- Available in 5 colours (Limestone, White, Capital Tan, Dark Bronze, Aluminum Grey)
- 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 tear resistance
- Stress relaxation
- 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
- Capable of ±35 % joint movement
Packaging
300 mL (10.1 US fl. oz) cartridge (12/case)
Colour
White and Limestone
Product Details
ENVIRONMENTAL INFORMATION
Conformity with LEED® v4 EQ Credit: Low-Emitting Materials
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
Shelf Life
12 months in original unopened packaging.
Storage Conditions
Store dry at temperatures between 4 and 35 °C (39 and 95 °F). Condition product between 18 and 30 °C (65 and 86 °F) before using.
Volatile organic compound (VOC) content
≤ 40 g/L
Shore A Hardness
| 40 ± 5 (21 days) | (ASTM C661) |
Tensile Strength
| 1.21 MPa (75 psi) (28 days) | (ASTM D412) |
Tensile Stress at Specified Elongation
| (ASTM D412) |
Adhesion in Peel
| (TT-S-00230C, ASTM C794) |
Tear Strength
| 9.63 N/mm (55 lb/in) | (ASTM D 624) |
Movement Capability
| ± 35 % | (ASTM C719) |
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
Backing Material
Use closed cell, polyethylene foam backing rods.
Ambient Air Temperature
4 to 38 °C (39 to 100 °F). Sealant should be installed when joint is at midrange of its anticipated movement.
Substrate Temperature
4 to 38 °C (39 to 100 °F). Sealant should be installed when joint is at midrange of its anticipated movement.
Curing Rate
Final cure: 5 - 7 days
Tack-free time
3 - 6 hours
Yield
300 mL (10.1 oz) Cartridge: Yield in Linear meters
| Depth 6 mm (1/4") | Depth 9.5 mm (3/8") | Depth 13 mm (1/2") | |
| Width | |||
| 6 mm (1/4") | 7.4 (24.2) | ||
| 9.5 mm (3/8") | 4.9 (16.2) | 3.3 (10.8) | |
| 13 mm (1/2") | 3.7 (12.1) | 2.5 (8.1) | 1.9 (6.1) |
| 19 mm (3/4") | 2.5 (8.1) | 1.6 (5.4) | 1.2 (4.0) |
| 25.4 mm (1") | 0.9 (3.0) |
SUBSTRATE PREPARATION
All joint surfaces must be clean, sound, dry 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 this should be accomplished by mechanical means. Bond breaker tape or backer rod must be used in bottom of joint to prevent bond.
Priming
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. Consult Sikaflex® Primers Product Data Sheet for additional information.
CLEAN UP
Clean all tools and equipment with Sika® Urethane Cleaner and Thinner. Once hardened, product can only be removed mechanically. Wash soiled hands and skin thoroughly in hot soapy water or use Sika® Hand Cleaner towels.
FAQ
Avoid exposure to high levels of chlorine (maximum continuous level is 5 ppm of chlorine).
White colour tends to yellow slightly when exposed to ultraviolet light.
Since system is moisture-cured, permit sufficient exposure to air.
Avoid contact with materials or surfaces impregnated with, or containing, oil, asphalt, tar, or bituminous substances. Don’t cure in the presence of uncured silicone sealants, alcohol, and other solvent cleaners.
Sikaflex® Construction Sealant can be painted over with water, oil- and rubber-based paints.
When over-coating with water-, oil- and rubber- based paints, compatibility and adhesion tests are essential.
Allow at least seven (7) days for sealant to cure under stated conditions when using Sikaflex® Construction Sealant in total water immersion situations or prior to painting.
Proper sealant dimensions for moving joints are 2:1 width to depth ratio, with a recommended 6 mm (1/4 in) minimum and 13 mm (1/2 in) maximum depth of sealant. For nonmoving joints, the width to depth ratio can vary.
The maximum depth of sealant in horizontal joints subject to traffic is 13 mm (1/2 in).
For best performance, Sikaflex® Construction Sealant should be gunned into joint when joint slot is at mid-point of its designed expansion and contraction. Recommended application temperature is between +4 and +38 °C (39 and 100 °F). For cold-weather application, store sealant at approximately +21 °C (70 °F) and remove just prior to using. Ensure joint is clean sound, dry, and frost-free before sealing. Install with hand or power operated caulking gun. Cut plastic tip on cartridge to desired joint size. Puncture airtight seal at base of tip. Place nozzle of gun into bottom of joint and fill entire joint. Keeping the nozzle deep in the sealant, continue with a steady flow of sealant preceding nozzle to avoid air entrapment. Also, avoid overlapping of sealant since this also entraps air. Tool sealant when wet to compact and ensure contact with joint walls, produce the required finish, and achieve a correctly dimensioned seal.
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. Consult Sikaflex® Primers Product Data Sheet for additional information.
All joint surfaces must be clean, sound, dry 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 this should be accomplished by mechanical means.
Sikaflex® Construction Sealant is suitable for vertical and horizontal joints.
Linear Metre of Sealant per Litre
Width |
6 mm (1/4 in) depth |
13 mm (1/2 in) depth |
6 mm (1/4 in) |
24.8 |
|
13 mm (1/2 in) |
12.4 |
6.2 |
19 mm (3/4 in) |
8.3 |
4.1 |
The application temperature should be between +4 and +38 °C (39 to 100 °F).The Sealant should be installed when the joint is at the mid-range of its anticipated movement.
For cold-weather application, store sealant at approximately +21 °C (70 °F)
