Sika Sikaflex 1A Black 20oz Sausage 91003

Sikaflex 1A is a premium-grade, high-performance, polyurethane-based, non-sag elastomeric sealant. Sikaflex 1A can be used in green and damp concrete applications and is readily placeable at 40°F.

Fast tack-free and final cure times
Excellent resistance to aging and weathering
High elasticity - cures to a tough, durable, flexible consistency

$12.13

Availability: In stock ( 305 Available )

Free Shipping for orders over $300

Details

Sika Sikaflex-1A Black 20oz Sausage

Sika Sikaflex-1A Black is a premium-grade, one-component polyurethane sealant and adhesive for construction joints and detail work. This non-sag, moisture-cured formula is designed for vertical and horizontal applications and can be used on green and damp concrete under the conditions outlined by the manufacturer. With durable elasticity, strong adhesion to many common construction materials, and suitability for submerged conditions, Sikaflex-1A is a versatile choice for demanding sealing and bonding applications.

Key Features

One-component, moisture-cured, non-sag polyurethane sealant.
Suitable for vertical and horizontal joints.
Capable of +/-35% joint movement.
Excellent adhesion to many construction materials without primer in many applications.
Can be applied to green concrete 24 hours after pour and damp concrete 1 hour after getting wet.
Paintable with water-, oil-, and rubber-based paints after proper cure and testing.
Jet fuel resistant and non-staining.
Certified to NSF/ANSI/CAN 61 for potable water.

Applications

Small construction joints and fillets.
Windows and door frames.
Reglets and flashing details.
Common roofing detail applications.
Construction adhesive applications between dissimilar materials.
Vertical and horizontal joint sealing.
Submerged conditions such as canal and reservoir joints.
Green and damp concrete joint applications where permitted by the manufacturer.

Technical Specifications

Property	Value
Product Type	Elastomeric joint sealant / adhesive
Chemical Base	One-component polyurethane-based sealant
Packaging	20 fl oz (600 ml) sausage
Color	Black
Shelf Life	12 months in original, unopened packaging
Storage Temperature	40 degrees F to 95 degrees F
Shore A Hardness	45 +/- 5
Elongation at Break	550%
Movement Capability	+/-35%
Tear Strength	55 lb/in
Service Temperature	-40 degrees F to +170 degrees F
Tack Free Time	3 to 6 hours at 73 degrees F / 50% RH
Cure Time	4 to 7 days at 73 degrees F / 50% RH
Curing Rate	Up to 1/8 inch after 24 hours
Standards	ASTM C920 Type S Grade NS Class 35 Use T, NT, O, M, A, I; Federal TT-S-00230C Type II Class A; CAN/CGSB 19.13-M87; NSF/ANSI/CAN 61

FAQs

What is Sika Sikaflex-1A used for?
It is used for sealing small joints, fillets, windows, door frames, reglets, flashing details, roofing details, and many construction adhesive applications.

Can Sikaflex-1A be used on green or damp concrete?
Yes. It can be applied to green concrete 24 hours after pour and to damp concrete 60 minutes after standing or excess water has been displaced, following the manufacturer instructions.

Is Sikaflex-1A suitable for submerged applications?
Yes. It is suitable for submerged conditions such as canal and reservoir joints. The manufacturer advises allowing 1 week of cure at standard conditions for total water immersion situations.

Can Sikaflex-1A be painted?
Yes. It is paintable with water-, oil-, and rubber-based paints, but compatibility and adhesion testing are essential and the sealant should be allowed to cure for 7 days before overcoating.

What joint sizes is Sikaflex-1A designed for?
It is designed for joints where the maximum sealant depth does not exceed 1/2 inch, with a minimum depth of 1/4 inch.

Does Sikaflex-1A need primer?
Priming is not usually necessary, but some substrates or water immersion conditions may require it depending on testing and project conditions.

More Information