Description
Polajoint
100% Solids, Self-Leveling Epoxy Joint & Crack Filler
Polajoint is a two-component, 100% solids, modified epoxy designed to form a semi-hard, durable joint compound for repairing and sealing cracks and joints in concrete and steel infrastructure. This pourable, self-leveling formulation provides long-lasting protection while accommodating mild structural movement.
Engineered for waterproofing and sealing applications, Polajoint delivers excellent adhesion and chemical resistance in demanding environments.
Key Benefits
- 100% Solids Formula: No shrinkage and minimal odor
- Semi-Hard & Durable: Withstands traffic and mechanical stress
- Self-Leveling: Flows easily to completely fill joints and cracks
- Chemical Resistant: Resists acids, alkalis, oils, and solvents
- High Temperature Performance: Maintains properties under elevated temperatures
- Fast Cure: Rapid return to service
- Strong Adhesion: Bonds securely to joint walls to prevent seepage
- Prevents Liquid Intrusion: Seals fractures caused by thermal shock
Typical Applications
- Filling and sealing control joints and cracks in concrete slabs
- Sealing saw-cut grooves for stress relief
- Sealing around railing posts, equipment mounts, and structural penetrations
- Repairing fractures in concrete caused by thermal movement or shock
- Sealing gaps to prevent vermin entry in food processing facilities
Recommended Substrates
Polajoint may be applied over:
- Concrete
- Fiberglass composites
- Most metals
- Mineral composites
- Wood and wood composites
- Slate and tile
- Other approved structural surfaces
Coverage
- Approximately 125 lineal feet per 12 lb unit
(Based on a 1/2″ wide x 1/2″ deep joint; actual coverage varies by substrate and joint dimensions)
Packaging
- 12 lb unit
Color: Gray
Sealant Type: Urethane-modified epoxy
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 |



