Construction Sikaflex ® 1a One part polyurethane, elastomeric sealant/adhesive Description



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Application Temperature

40° to 100°F. Sealant should be installed when joint is at mid-range of its anticipated

movement.

Service Range

-40° to 170°F



Curing Rate

Tack-free time

3 to 6 hours

Tack-free to touch

3 hours

Final cure

4 to 7 days

Tear Strength (ASTM D-624)

55 lb./in.



Shore A Hardness (ASTM C-661)

21 day    40±5



Movement Capability (ASTM C-719) 

  +/- 35%

Tensile Properties (ASTM D-412)

21 day


Tensile Stress

175 psi (1.21 MPa)

Elongation at Break

550%


Stress at 100%

85 psi (0.59 MPa)



Adhesion in Peel (TT-S-00230C, ASTM C 794)

Substrate

Peel Strength

Adhesion Loss

Concrete

20 lb.


0%

Aluminum

20 lb.

0%

Glass



20 lb.

0%

Weathering Resistance

Excellent

SEALANT VALIDATION

Issued to:  Sika Corporation

Product:    Sikaflex

®

-1A

C719: 

Pass ____  Ext:+35%    Comp:-35%



Substrate: 

Mortar, Aluminum, Glass 

[mortar substrate primed with Sika Primer 429]

C661: 

Rating 40



Validation Date: 8/3/12 − 8/2/17

No. 0812-S11211

Copyright © 2012



RESULTS MAY DIFFER BASED UPON STATISTICAL VARIATIONS DEPENDING UPON MIXING METHODS AND EQUIPMENT, 

TEMPERATURE, APPLICATION METHODS, TEST METHODS, ACTUAL SITE CONDITIONS AND CURING CONDITIONS.

PRIOR TO EACH USE OF ANY SIKA PRODUCT, THE USER MUST ALWAYS READ AND FOLLOW THE WARNINGS AND 

INSTRUCTIONS ON THE PRODUCT’S MOST CURRENT PRODUCT DATA SHEET, PRODUCT LABEL AND SAFETY DATA 

SHEET WHICH ARE AVAILABLE ONLINE AT HTTP://USA.SIKA.COM/ OR BY CALLING SIKA’S TECHNICAL SERVICE DE-

PARTMENT AT 800.933.7452 NOTHING CONTAINED IN ANY SIKA MATERIALS RELIEVES THE USER OF THE OBLIGATION 

TO READ AND FOLLOW THE WARNINGS AND INSTRUCTIONS FOR EACH SIKA PRODUCT AS SET FORTH IN THE CUR-

RENT PRODUCT DATA SHEET, PRODUCT LABEL AND SAFETY DATA SHEET PRIOR TO PRODUCT  USE.



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