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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.
- Pick-proof sealant around windows, doors, lock-ups
- Suitable for potable water contact, meets NSF/ANSI Standard 61.
$154.58
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SKU
18861
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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