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Epoxy Injection Resin

For Concrete and Wood

Waterproofing Structural Repair

Product Description

Epoxy.com Product #3301 is a 2-component, low viscosity, 100% solids, epoxy injection resin for concrete and wooden substrates.


Epoxy.com Product #3301 is a 100% solids low viscosity epoxy adhesive used to restore cracked structural concrete by the pressure injection method and to grout cracks in a horizontal plane by gravity.


  • Low viscosity � exceptional flow characteristics
  • High Strength


Surface Preparation for Epoxy Injection

Surface must be clean and sound. Interfaces of cracks must be free of dirt, laitance, grease, curing compounds and other foreign matter. Flushing with water through ports under pressure may he necessary prior to epoxy injection. Cracks may be damp or wet.

Epoxy Mixing Directions

Temperature of Product #3301 must be 60°F. or above at time of mixing. Stir each component separately before blending. Best if used in an automatic binary mixing system. If mixed manually mix two parts by volume of Part A with one part by volume of B for three minutes with a low-speed electric drill motor equipped with a mixing paddle.

Application Epoxy Injection Resin

For pressure injection set ports at intervals that approximately equal the thickness of the member to be injected in inches. Ports may need to place closer together for very fine cracks, or may be slightly further for wider cracks. Seal between and around each port with Product #2005, or #2006. Inject Product #3301 from an epoxy injection machine or binary hand or pneumatic injection gun. For more information consult Epoxy.com� technical service department.

Limitations of Epoxy Injection Resin

Minimum substrate temperature must be 50° F.

Cleaning Epoxy Injection Resin from Tools

All tools and equipment should be cleaned before the system gels. Use methyl ethyl ketone or any lacquer solvent.

Environment & Health

This is a solvent free and Nonyl Phenol free product, and practically odorless during application. Follow the appropriate Occupational Health and Safety guidelines applicable to the location where the application is undertaken. For more information, please refer to the safety datasheets for the individual components.

Ratio of Components

2 parts of component A are mixed with 1 part of component B, by volume.

Add Hardener B to Base A. Mix with slow speed drill and appropriate mixing paddle taking care not to entrain air. May also be mixed by appropriate static mix tube.

Application Temperature

The recommended substrate temperature is 60° - 80°F, but no less than 50°F.

Application Time/Pot Life

Mixed product should be used within 40 minutes at a temperature of 70°F. At higher temperatures the application time is shorter.

Curing Time (at 70°F)

Approximately 12 hours. The product is fully hardened after 5 - 7 days.





Solids Content

Approx. 100 %


12 g/l


Component A approx.- 9.30 lbs/gal (1.12 kg/l)

Component B approx. - 8.60 lbs/gal (1.03 kg/l)

Mixed approx. - 9.10 lbs/gal (1.09 kg/l)


12 months in unopened pack. Storage temperature between 40°F and 100°F. Protect from weather and moisture / contaminant ingress (tightly sealed to prevent air infiltration, and exfiltration).


The product is delivered A+B in the following packs:

Unit Base A Hardener B
3 gallons2 Gallons1 Gallon
12 Gallon  2 each 4-Gallons  1 each 4 gallon  

Physical Properties

Property Result Test Method
Compressive Strength >11,600 psi ASTM C579
Flexural Strength  > 8,700 psi ASTM C580
 Compressive Strength >11,600 psi ASTM C579
Tensile Strength >7,175 psi ASTM C307

Further Information

If you would like additional information, please Epoxy.com Technical Support Department


Any recommendation or suggestion relating to the use of the products sold by Epoxy,com whether in its technical literature, or in response to a specific enquiry, or otherwise, is based upon data believed to be reliable, however the products and information are intended for use by Customers having requisite skill and know-how in the industry and therefore it is for the Customer to satisfy itself of the suitability of the products for its own particular use and it shall be deemed that the Customer has done so at its sole discretion and risk.

Proper mixing and installation is critical to the optimal success of all products.  See Installation Tips, Techdata, & MSDS for more details on our products.  Be sure to contact us with any questions and/or concerns that you have.

For more information please contact:

A Division of Epoxy Systems, Inc
A Vermont Corporation

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                        Technical Support
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