Description
Andek 950
Industrial-Strength, Moisture-Curing Polyurethane Adhesive
Andek 950 is a single-component, moisture-curing polyurethane adhesive engineered for extreme industrial performance. It bonds virtually all construction materials—including steel, aluminum, wood, masonry, and composites—and reaches into cracks, voids, and hard-to-access areas where conventional adhesives fail. Once cured, it expands to fill gaps while maintaining a flexible, durable bond that withstands wet conditions and temperature extremes.
Usage: Adhesion, Waterproofing, Sealant
Key Features
- Universal Bonding: Adheres to virtually any construction material
- Expansive Penetration: Fills cracks, voids, and hard-to-reach spaces
- Moisture-Curing: No catalyst, mixing, or pre-activation required
- Durable & Flexible: Maintains adhesion under wet conditions, thermal movement, and temperature extremes
- Labor-Saving: Ready-to-use; no specialized preparation or metering
- Long-Term Performance: Bonding remains stable over time, even with substrate movement
Recommended Applications
Andek 950 can be applied over:
- Concrete, masonry, and porous stone
- Mineral composites and wood composites
- Metals including steel and aluminum
- Fiberglass composites, rubber, and select plastics
- Other approved construction materials
Coverage: Approx. 400 sq ft/gal (varies by substrate)
Container Sizes: 1 gallon, 5 gallon
Color: Tan
Technology: Moisture-curing polyurethane
Preparation and Application
Application
For pressure injection: All cracks to be treated should be clean and dry. Drill ½” diameter holes 3″ deep into all visible cracks at intervals of one per 18″ of running crack. Coat ⅜” diameter plastic ports with ANDEK 950 and insert into the holes, the ANDEK 950 will glue the ports into place. After all entry ports have set, apply ANDEK 950 over the cracks and while still wet, encapsulate a layer of 4″ wide POLAFAB over the crack with a 2nd coat of ANDEK 950. Only one side of the structure should be prepared, with the opposite face or side left untouched. As soon as the ANDEK 950 has thoroughly cured (8-12 hours after the last application), injection may commence. A Graco 45:1 King or similar equipment with ½” diameter hose and insertion nozzle should be used. Insert bungs into all entry ports except the one that is to be connected to the flow. Begin at the lowest entry port and progress systematically upwards, replacing the bungs after each application is complete. Inject ANDEK 950 into each entry port at 100 psi; flow rate will be determined by the extent of the interior cracks. Observation of the opposite face will determine when all interior cracks are filled as ANDEK 950 should begin to surface. Andek 950 will swell upon curing. All equipment should be cleaned with xylene before cure takes place.
When sealing horizontal cracks: ANDEK 950 (low viscosity, Type ‘B) is applied into the crack using a bulk gun with the necessary width of nozzle following the same procedure with injection ports and POLAFAB. Voids in poured screeds may also be treated in a similar manner.
Pump Application
Use a Graco 45:1
Recommended Thickness
3 mils wet up to 6 mils dry
Clean up
All equipment should be cleaned with xylene before cure takes place.
Limitations
Avoid humid atmospheres and keep lids tightly closed.
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 | May contain a trace amount | |
| Shear Strength | 600 lbs PSI | ASTM E-564 |
| Solids Content | 100% (B.W.); 110% (B.V.) | ASTM D-1044 |
| Peel Strength | 35 lbs PSI | ASTM C-794 |
| Flammability | Non-flammable | FTMS 141A (M4293) |
| Weight per gallon |
10.2 pounds | ASTM D-1475 |
| Cure Time |
10 hours @ 70°F (70% R.H) | |
| Hardness | 50 degree shore ‘D’ | ASTM C-661 |