Description
ANDEK 950
Industrial-Strength, Moisture-Curing Polyurethane Adhesive & Void-Filling Bonding System
ANDEK 950 is a single-component, moisture-curing polyurethane adhesive engineered to deliver exceptional bond strength, flexibility, and long-term durability in demanding infrastructure applications. Designed for bridges, piers, foundations, and heavy structural assemblies, it bonds a wide range of construction materials into a unified, high-performance system.
Upon application, ANDEK 950 expands to penetrate and fill voids within the substrate, creating a deep mechanical and chemical bond. It then rapidly cures through ambient moisture exposure to form a tough, flexible adhesive matrix capable of withstanding structural movement, environmental stress, and wet conditions.
Its formulation is specifically designed for field efficiency, eliminating the need for mixing, metering, or catalyst addition while maintaining consistent, high-strength performance.
Key Benefits
- Extreme Bond Strength
Forms an exceptionally strong adhesion to a wide variety of construction materials - Void-Filling Expansion
Expands into cavities and irregularities to improve structural bonding and stability - Moisture-Curing Technology
Cures in the presence of moisture without requiring catalysts or mixing - Wet Condition Performance
Maintains adhesive strength even in damp or wet environments - Permanent Flexibility
Accommodates substrate movement while maintaining bond integrity - Thermal Stability
Resists softening at high temperatures and maintains flexibility in cold conditions - Fast, Labor-Saving Application
Single-component system eliminates mixing, reducing labor time and application complexity - Structural Movement Compatibility
Allows natural movement of substrates without bond failure - Long-Term Durability
Designed for sustained performance in demanding infrastructure environments
Recommended Substrates
Suitable for application 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
Approximately 400 sq ft per gallon
(Coverage may vary depending on substrate porosity and application conditions.)
Container sizes
1 gallon, 5 gallon
Color
Tan
Technology
Moisture-Curing Polyurethane System
ANDEK 950 Application Guide
Application
Pressure Injection
- All cracks to be treated must be clean and dry.
- Drill 1/2″ diameter holes approximately 3″ deep into visible cracks at intervals of one hole every 18″ along the crack line. Coat 3/8″ diameter plastic injection ports with ANDEK 950 and insert them into the drilled holes. The material will secure the ports in place.
- Once all ports are installed and set, apply ANDEK 950 over the crack area. While still wet, embed a 4″ wide strip of POLAFAB over the crack and encapsulate it with a second coat of ANDEK 950.
- Prepare only one side of the structure, leaving the opposite side untreated for observation during injection.
- Allow the material to cure thoroughly for approximately 8–12 hours after the final application before beginning injection procedures.
- Injection should be performed using a Graco 45:1 King pump or equivalent equipment fitted with a 1/2″ hose and insertion nozzle. Insert plugs into all ports except the active injection port. Begin at the lowest port and progress upward systematically, resealing each port after injection is complete.
- Inject ANDEK 950 at approximately 100 psi. Flow rate will vary depending on the extent of internal cracking. Complete crack filling is indicated when material becomes visible on the untreated side of the structure.
ANDEK 950 expands slightly during curing.
Sealing Horizontal Cracks
For horizontal crack repair, use ANDEK 950 Low Viscosity Type B applied with a bulk gun and appropriately sized nozzle. Follow the same procedures used for injection ports and POLAFAB reinforcement.
Voids in poured screeds may also be repaired using this method.
Pump Application
Use a Graco 45:1 pump or equivalent equipment.
Recommended Thickness
3 mils wet film thickness up to 6 mils dry film thickness.
Clean-Up
Clean all tools and equipment with xylene before the material cures.
Limitations
Avoid application in humid conditions. Keep containers tightly sealed when not in use.
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.
ANDEK 950 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 |