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
POLAJOINT Application Guideline
Surface Preparation
All surfaces must be clean, dry, and free of loose debris, oil, paint, grease, or any contaminants that may interfere with proper adhesion.
For proper repair of irregular cracks, it may be necessary to rout the crack into a symmetrical “U” shape.
Prime highly porous or very dense concrete surfaces with POLAPRIME 21 as needed.
Deep joints or cracks should be filled with an appropriately sized backer rod, such as Dow Ethafoam, prior to application.
Application
In a clean, dry container, mix the complete two-part unit thoroughly for a minimum of 5 minutes using low-speed mixing. Avoid entrapping excessive air during the mixing process.
After mixing, apply POLAJOINT by pouring directly into the crack or joint using a pouring spout or refillable caulking gun.
Fill the joint completely. Additional material may be required after a few minutes to compensate for settling and air release.
Recommended Joint Size
Approximately 1/2″ wide × 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 material cures.
Storage
Store in a dry area away from direct sunlight and protect from freezing. Keep containers tightly sealed.
Shelf life is up to 1 year from the date of manufacture when stored in original, unopened containers between 50°F (10°C) and 90°F (32°C).
Disposal
Dispose of waste in accordance with all applicable federal, state, and local environmental regulations. Incineration is the preferred method of disposal.
Safety Information
Read the product label and Safety Data Sheet (SDS) prior to use for important health and safety information.
Keep out of reach of children and pets.
For additional information, contact the Andek Technical Department.
POLAJOINT 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 |