Description
POLAJOINT
High-Strength Semi-Hard Epoxy Joint and Crack Filler for Durable Structural Repair
POLAJOINT is a 100% solids, two-component, pourable modified epoxy system engineered to form a durable, semi-hard joint compound for concrete and steel infrastructure. Designed for applications with little to moderate movement, it provides long-lasting protection while maintaining structural integrity under demanding service conditions.
Once cured, POLAJOINT develops a tough, wear-resistant fill that bonds strongly to substrate surfaces and remains stable under mechanical stress. It is formulated to resist shrinkage, maintain adhesion, and provide reliable performance in joints and cracks exposed to water, chemicals, and environmental loading.
Ideal for industrial, commercial, and infrastructure applications, POLAJOINT delivers dependable sealing performance in both repair and preventative maintenance scenarios.
Key Benefits
- Extreme Durability
Forms a tough, semi-hard joint compound resistant to wear and mechanical stress - Controlled Flexibility
Accommodates mild structural movement without loss of adhesion or cracking - Chemical Resistance
Highly resistant to acids, alkalis, solvents, and oils - Seamless Crack & Joint Sealing
Effectively fills and seals cracks and control joints in concrete and steel systems - High Temperature Performance
Maintains stability and performance under elevated temperature conditions - Fast Cure System
Rapid curing for reduced downtime and efficient installation - No Shrinkage Formula
Maintains volume integrity after curing with minimal odor - Mechanical Strength
Highly resistant to impact, abrasion, and structural damage - Prevents Chemical Seepage
Blocks ingress of chemicals into joints and cracks - Long-Term Adhesion
Maintains strong bond to concrete, metals, and composite substrates
Various Uses
- Filling cracks and control joints in concrete slabs
- Sealing sawcut grooves for stress relief in concrete
- Sealing around railing posts and equipment mounts
- Penetrating and sealing thermal shock fractures
- Preventing liquid intrusion into structural cracks
- Sealing gaps to prevent vermin entry in food processing facilities
Recommended Substrates
Suitable for application over:
- Concrete and cementitious surfaces
- Fiberglass composites
- Most metals
- Mineral composites
- Wood and wood composites
- Slate and tile
- Other approved construction and industrial surfaces
Coverage
Approximately 125 linear feet per 12 lb unit
(Coverage may vary depending on joint size and substrate condition.)
Packaging
12 lb unit
Color
Gray
Sealant Type
Urethane Epoxy System
Preparation and Application
Surface Preparation
All surfaces to be coated must be dry and free of loose debris, oil, paint, grease and other substances that would interfere with bond. For proper repair of irregular cracks, it may be necessary to router out the crack into a Symmetrical “U” shape. It is advisable to prime highly porous surfaces or very dense concrete surfaces with Polaprime 21. Very deep joints or cracks need to be filled with a proper diameter backer-rod material such as Dow Ethafoam.
Application
In a clean, dry container, mix the complete 2-part unit for at least 5 minutes with low speed mixing. Try not to entrap excessive quantities or air when mixing. After thorough mixing, POLAJOINT may be poured into the crack or joint through a pouring spout or with a refillable caulking gun. Completely fill the crack or joint. It may be necessary to top off the filled crack or joint after a few minutes of settling and air release takes place.
Recommended Thickness
1/2″ wide x 1/2″ deep
Working Time
Approximately 30 minutes at 70°F (21°C)
Cure Time
Approximately 6 hours at 70°F (21°C)
Clean up
Clean tools and equipment with xylene or toluene solvent before the product cures.
Storage
Store in a dry area and protect from direct sunlight and freezing. Keep container tightly sealed. Shelf life is 1 year from date of manufacture when stored in a factory sealed container between 50ºF (10ºC) and 90ºF (32ºC).
Disposal
Waste disposal must be in accordance with existing federal, state and local environmental control laws. Incineration is the preferred method of disposal.
Read the container label warning and Safety Data Sheet (SDS) for important health and safety information prior to the use of this product.
KEEP AWAY FROM CHILDREN AND PETS
For additional information, contact the Andek Technical Department
Technical Data
| VOC | <10 gms/liter | |
| Total Solids Content (B.W.) | 100% | ASTM D-1044 |
| Shore ‘A’ Hardness | 95 | ASTM D-2240 |
| Water Absorption | Zero | ASTM D570-77 |
| Water Vapor Transmission | 5.3g/M²/24 hours | ASTM E-96 |
| Flashpoint | 400° F | FTMS 141A (M4293) |
| Specific Gravity |
1.3 | ASTM D-792 |
| Chemical Resistance |
Excellent | |
| Elongation |
50% | ASTM D-412 |
| Tensile Strength | 5,600 psi | ASTM D-412 |