Sika Sikadur 31 Hi-Mod Gel 1 Gallon

Sikadur 31 Hi-Mod Gel, is a 2-component, 100 % solids, solvent-free, moisture-tolerant, high-modulus, high strength, structural epoxy paste adhesive. Excellent adhesion to concrete, masonry, metals, wood, and most structural materials.

Seals cracks and around injection ports prior to pressure-injection grouting.
Interior, vertical, and overhead repair of concrete as an epoxy mortar binder.
As a pick-proof sealant around windows, doors, lock-ups etc. inside correctional facilities.
Suitable for potable water contact, meets NSF/ANSI Standard 61.

$154.58

Availability: In stock ( 35 Available )

Must Ship via LTL

SKU

18861

Details

Sika Sikadur 31 Hi-Mod Gel – 1 Gallon

Sika Sikadur 31 Hi-Mod Gel is a two-component, 100% solids, moisture-tolerant, high-modulus epoxy paste adhesive. Designed for structural bonding, anchoring, and repairs, it develops high early and ultimate strengths while conforming to ASTM C-881 and AASHTO M-235 specifications. Its non-sag consistency allows application on vertical and overhead surfaces, making it ideal for demanding bonding and repair projects. With strong adhesion to concrete, steel, masonry, and wood, it delivers long-term durability even in moisture-prone conditions.

Key Features

Meets ASTM C-881 and AASHTO M-235 standards for structural adhesives.
High-modulus, high-strength formulation for structural bonding.
Non-sag paste consistency for vertical and overhead applications.
Moisture-tolerant during application and curing.
Excellent adhesion to concrete, steel, masonry, and wood.
Fast-setting with high early and ultimate strength development.
Convenient 1:1 mix ratio by volume for easy preparation.
Approved for potable water contact (NSF/ANSI Standard 61).

Applications

Structural bonding of concrete, masonry, metal, and wood substrates.
Anchoring bolts, dowels, pins, and reinforcement steel.
Sealing cracks and around injection ports prior to epoxy injection grouting.
Interior vertical and overhead patching when mixed with aggregate as an epoxy mortar.
Pick-proof sealant for windows, doors, and security applications in correctional facilities.

Technical Specifications

Compressive Strength (ASTM D695)	Up to 16,000 psi at 28 days (temperature dependent)
Flexural Strength (ASTM D790)	6,100 psi at 7 days
Tensile Strength (ASTM D638)	3,300 psi at 7 days
Elongation at Break (ASTM D638)	0.9% at 7 days
Shear Strength (ASTM D732)	4,600 psi at 7 days
Bond Strength to Concrete (ASTM C882)	Up to 2,900 psi (moist cure, 14 days)
Bond Strength to Steel (ASTM C882)	2,900 psi at 2 days (dry cure)
Modulus of Elasticity (Compression)	7.95 × 10⁵ psi at 7 days
Modulus of Elasticity (Flexure)	1.67 × 10⁶ psi at 7 days
Heat Deflection Temperature	135°F at 7 days
Water Absorption (ASTM D570)	0.07% at 24 hours
Pot Life	~60 minutes at 73°F
Mix Ratio	Component A:B = 1:1 by volume
Coverage	1 gallon yields ~231 cu. in. of epoxy paste; with aggregate, ~346 cu. in. epoxy mortar
Shelf Life	24 months in unopened containers
Packaging	1 gallon and 3 gallon units

Frequently Asked Questions

What is Sikadur 31 Hi-Mod Gel used for?
Structural bonding, anchoring, sealing cracks, epoxy mortar repairs, and pick-proof sealing in security applications.

Can it be applied to damp concrete?
Yes. It is moisture-tolerant and can be applied to dry or damp surfaces free of standing water.

Is it suitable for overhead repairs?
Yes. Its non-sag paste consistency makes it ideal for vertical and overhead patching when mixed with aggregate.

How is it mixed?
Mix Component A and Component B in a 1:1 ratio by volume until uniform in color. Pot life is about 60 minutes at 73°F.

Does it meet potable water standards?
Yes. It is approved under NSF/ANSI Standard 61 for potable water contact.

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