Sika Sikadur 51 NS 3 Gallon Unit

Sikadur 51 NS is a 2-component, non-sagging, solvent-free, moisture-tolerant, flexible epoxy control joint sealer and adhesive used to fill vertical and overhead non-moving, saw-cut construction control joints and cracks.

2 to 1 ratio ensures easy mixing, easy handling
An adhesive with excellent flexibility
Excellent durability

$447.75

SKU

19083

Sika Sikadur 51 NS – Flexible Epoxy Control-Joint Sealer and Adhesive

Sika Sikadur 51 NS is a high-performance, two-component, non-sagging, solvent-free epoxy designed for sealing control joints and bonding applications in concrete and masonry. This flexible epoxy prevents joint edge deterioration, providing durable, long-lasting adhesion. Ideal for vertical and overhead applications, Sikadur 51 NS meets the requirements of ACI 302.1R for joint materials and delivers superior shock absorption. Its easy 2:1 mix ratio ensures simple handling and application, making it an excellent solution for professional-grade joint sealing and adhesive needs.

Key Features:

Flexible, non-sagging epoxy joint sealer and adhesive
Excellent adhesion to concrete, masonry, and other substrates
Conforms to ACI 302.1R (4.10-Joint Materials)
Moisture-tolerant before, during, and after curing
Shock-absorbent with superior durability
Prevents deterioration of control joint edges
2:1 mix ratio for easy handling and application
Can be used as a flexible security sealant

Applications:

Sealing non-moving control joints and saw-cut joints
Overhead and vertical crack filling
Flexible adhesive for bonding applications
Use in security sealing applications
Ideal for indoor and outdoor construction projects

Technical Specifications:

Property	Value
Packaging	3-gallon unit
Color	Concrete gray
Shelf Life	24 months in original, unopened container
Shore A Hardness (ASTM D-2240)	75–80 at 28 days
Shore D Hardness (ASTM D-2240)	30–40 at 28 days
Tensile Strength (ASTM D-638)	650 psi at 14 days
Elongation at Break (ASTM D-638)	80% at 14 days
Pot Life	1–1.5 hours
Cure Time (Tack-Free)	7–8 hours

Frequently Asked Questions:

What is the recommended application method for Sikadur 51 NS?
Sikadur 51 NS can be applied using a caulking gun, pressure extruder, or trowel for precise joint filling and adhesion.

Can this product be used in expansion joints?
No, Sikadur 51 NS is designed for non-moving control joints and is not recommended for expansion joints.

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