Concrete Surface Repairs-PolyPatch EPV

Epoxy based Repair Mortar for Vertical Substrate (PolyPatchÒ EPV)

PolyPatch EPV is a 3-component product based on epoxy which is designed to repair the damaged surfaces of concrete. Component A is a mixture of epoxy resin. Component B is the hardener part of the epoxy resin, and component C is the filler of this product and is a combination of aggregates with suitable grading. This product is a polymer mortar in which epoxy polymer is used instead of cement. High mechanical and chemical properties are the characteristics of this product. This product is generally used to repair structures with high mechanical and chemical strengths due to its high expense.

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This product is produced based on the requirements of the ASTM C881/C881M Standard.

The advantages of using this product
  • • Perfect bonding to the concrete surfaces
  • • It has high chemical strength against petroleum material, seawater, oil, ammonia, etc.
  • • High mechanical strength
  • • High abrasion strength
  • • Without shrinkage
The usage of this product
  • • Repairing all vertical, overhead, and horizontal concrete substrate
  • • Repairing the concrete segments
  • • Repairing the structural joints
  • • Developing a surface coverage to increase the abrasion and chemical strength
  • • Jointing between the stone and ceramic
The instruction to use the product:
  • The amount of using this product is obtained with respect to the specific weight of the epoxy paste and the dimensions of the repair section.
  • The damaged part is rubbed using a mechanical method to reach a hard part. In this step, it is tried to make grooves with negative angles to provide the interaction of the repair with the substrate. The age of the base concrete must be at least 28 days.
  • Wash the surfaces completely and let them dry
  • The volume of the required paste should be calculated and made in a mixer with low speed (a maximum of 400 rounds per minute). First, component B is added to component A and mixed for 2 minutes. Mixing must continue so that a uniform mixture is obtained. Then the powder component C is gently added to the mixer while it is working to obtain a homogenous mixture (each 30 kg packet (all components) will approximately have 16 liters volume after mixing).
  • Let the entrapped air release from the mixture before repair. The repair must be done to up to 3 cm layers and must be implemented in different steps in case of the need for bigger thicknesses. The time between the two steps depends on the temperature of the environment.

Important notes while implementing:

  • The repair operation must be implemented at 20 to 25˚C, and it is not recommended to use epoxy repair at a temperature higher than 30˚C, and it is better to repair by cooling the environment and the components of the product.
  • Avoid putting the components in direct exposure to sunlight before mixing
  • The maximum thickness for repair in each step must not exceed 20 mm
  • Avoid making the paste in more than 15 minutes with respect to the heat from the epoxy mortar reaction
  • The repair tools must be cleaned with a suitable solvent after the operation is finished
  • Never dilute this product with a solvent
Physical and Chemical Specifications of the PolyPatch EPV:
  • Physical State and Color: Component A: Clear Liquid
  • Physical State and Color: Component B: Amber Liquid
  • Physical State and Color: Component C: Grey Powder
  • The Specific Gravity at 20˚C: Component A: 1/14 ± 0/02 g/cm3
  • The Specific Gravity at 20˚C: Component B: 1/02 ± 0/02 g/cm3
  • The Specific Gravity at 20˚C: Component C: 0/86 ± 0/05 g/cm3
  • The Specific Gravity at 20˚C: Mixture: 1/78 ± 0/05 g/cm3
Safety Precautions When using the product:
  • • Blink in water for at least 15 minutes in case of eye contact
  • • Wash your skin with clean water for 15 minutes in case of any contact with the skin
  • • The contaminated clothes must be washed with suitable detergents to be usable for further work.
  • • It is necessary to visit a doctor if the injured individual still feels uncomfortable
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