Product Data Sheet Safety Data Sheet Show all documents
Sikaflex® Construction Sealant

Sikaflex® Construction Sealant

ONE-COMPONENT, MULTI-PURPOSE, POLYURETHANE 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
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Product Data Sheet Safety Data Sheet Show all documents

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)  
      Ideal for:
  • 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

Sustainability / Certifications / Approvals

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
Product Information

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
Technical Information

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

Curing time

Tension

21 days

25 %0.24 MPa (35 psi)
21 days50 %0.41 MPa (60 psi)
21 days100 %0.59 MPa (85 psi)

(ASTM D412)

Adhesion in Peel

SubstratePeel StrengthAdhesion Loss
Concrete9 kg (20 lb)0 %
Aluminium9 kg (20 lb)0 %
Glass9 kg (20 lb)0 %

(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

Application Information

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
Consumption

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)
Application steps

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.

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