PolyBond 300

PolyBond 300

Polybond - 300 is a 100% solid epoxy system which is used for bonding new concrete to old concrete. It meets ASTMC-881-76-1987, Type II, Grade II, Class C. It meets AASHTO M-235 Class III specifications.




PolyBond 300  |  PolyBond 300 Gel

1:1 by volume | 1:1 by volume 

Test Method
Mixed Viscosity @ 74F 4,000-7,000 CPS | Gel  ASTMD-2393
Pot Life @75F 60 minutes ASHTO T-237
Tensile Strength 4,000 psi min. | 4,000 psi min ASTMD-638
Tensile Elongation 2-4% | 2-4%  ASTMD-695
Compressive Strength 10,000 PSI mion. | 10,000 PSI mion ASTMD-695
Compressive Modulus 485,000 PSI Min. | 485,000 PSI min ASTMD-695
Water Absorbtion 0.08 to 0.15% Max. | 0.08 to 0.15% Max ASTMD-570
Bond Strength (Direct Sheer) 500 PSI | 500 PSI Hardened to Hardened Concrete
Bond Strength (Diagnonal Sheer) 500 PSI | 500 PSI  Fresh to Hardened Concrete 28 days
Hardness 85-90 Shore D | 85-90 Shore D ASTMD-2240
Color Gray or neutral brown | Grey or neutral brown   
Open Time 50°F: 3 hours | 3 hours
75°F: 75 minutes | 75 minutes
100°F: 40 minutes | 40 minutes
Shelf Life 1 year minimum | 1 year minimum  


  • Bonding new concrete to old concrete
  • Filling voids and joints in masonry
  • Grouting bolts, dowels and rebars
  • Patching and repairs


  • Long Pot Life
  • High Strength·Easy 1:1 mix ratio by volume
  • 100% Solid
  • Easy to apply

Surface Preparation:

Concrete should be structurally sound, free of dust, dirt, loose paint. All concrete surfaces should be blast tracked or scarified for the best results. New concrete should be etched with a 25% solution of muriatic acid and then rinsed with fresh water 3 times.

Steel surface should be free of dirt, dust, grease, oil or paint. The best results are achieved by sand blasting the steelto white metal.

Premix part-B hardner. Mix one part base part-A to one part hardner part-B by volume. Mix thoroughly until uniform color is achieved by scraping sides and bottom.

As a bonding agent: Mixed material can be applied by roller, brush, or spray. Fresh concrete should be applied before adhesive becomes tack free.

As a Mortar: To each mixed part of PolyBond - 300 add 3-4 parts of sand (Flint shot) and mix thoroughly. This mortar can be applied with a trowel.

Temperature Limitation

Do not apply below 40°F. The temperature should be 40°F and rising.

Chemical Resistance

Uneffected by the following:

  • Nitric Acid 10%
  • Sulfuric Acid 10%
  • Hydrochloric Acid 30%
  • Citric Acid 15%
  • Phosphoric Acid 85%
  • Lactic Acid 25%
  • Sodium Hydroxide 30%
  • Lye Mineral Spirit
  • Gasoline Fuel
  • Oil
  • Hydrolic Fluid
  • Alcohol
  • Chlorox


2 Gallon Units
4 Gallon Units
10 Gallon Units
100 Gallon Units