DE NEEF® Denepox I-40 Data Sheet

Two Component Epoxy

Product Description

DE NEEF® Denepox I-40 is an ultra low viscosity, 100% solids, two component, moisture insensitive epoxy injection resin system designed specifically for gravity feeding or pressure injection of cracks. Its ultra low viscosity allows for gravity feeding of even hairline cracks on horizontal surfaces. DE NEEF® Denepox I-40 is moisture insensitive and can be applied in damp to dry (not wet) conditions. This product may be injected with multi-ratio pump or due to its long pot life, it may be “hot potted” with a single component pump.

Product Advantages

  • Ultra Low Viscosity
  • Moisture Insensitive
  • 100% Solids
  • VOC Compliant
  • Long Pot Life

Product Applications

  • Hairline Structural Cracks
  • Gravity Feed Horizontal Cracks
  • Porous Concrete Surfaces

Packaging & Handling

Approximately 1 gallon units

(92 fl oz. “PART A” & 32 fl oz. “PART B”)

Shelf Life: A minimum of 1 year in original, unopened container.

Storage: Store in a dry area, between 40°F and 95°F. Protect from direct sunlight. 

Installation Guidelines

Surface of application should be clean and sound. The surface must be free of dust, oil, grease, laitance, curing compounds, or any other contaminants. It may be dry to damp, but must be free of standing water. The very best results are obtained on dry concrete. Do NOT apply on surfaces, which have been sealed with a permanent type of form oil, curing compound or release agent. Remove these substances before application. The surface temperature must be 40°F and rising. Refer to DE NEEF® Surface Preparation Guidelines for more details.

Mixing Procedure: Stir each component separately. Mix 2.85 parts A with 1 part B by volume into a clean mixing container. Mix the epoxy with a slow speed drill with a mixing paddle attachment. Carefully scrape the sides and bottom of the pail during mixing with a paint stirring stick. Blend for 3 minutes. Mix only the amount of materials that can be used within the pot life.

Please note: Large batches of epoxy will cure much faster than small batches. Mixed epoxy will cure much faster in hot weather than in cold weather.

Application: For gravity feeding: mix appropriate amount of epoxy, 2.85 parts A to 1 part B by volume and pour onto properly dammed or widened crack to keep epoxy from spreading. As an injection epoxy: Mix and metering equipment is recommended. Please contact DE NEEF® Construction Chemicals or your local representative for detailed instructions.

Clean-Up: Remove uncured DE NEEF® Denepox I-40 from tools and equipment with a suitable solvent such as xylene or toluene immediately after use. Cured material may only be removed mechanically.

Health and Safety


Health Precautions:

  • Component A - IRRITANT - Prolonged skin or eye contact may cause sensitization and irritation.
  • Component B - CORROSIVE - Contact with skin or eyes may cause severe burns.

First Aid:

  • Skin Contact: Wash thoroughly with soap and water.
  • Eye Contact: Flush immediately with clean water and contact a physician.
  • Respiratory Problems: Remove affected person to fresh air immediately and contact a physician.
  • Hygiene: Wash hands immediately after use. Wash clothing before reuse.
  • Spills: Collect with absorbent material. Remaining material may be removed with a suitable solvent.
  • Disposal: Dispose of in accordance with local, stale and federal regulations. Refer to Safety Data Sheet for detailed safety precautions.

In the event of an EMERGENCY call: CHEMTREC 800-424-9300.


Application at ambient temperature below 40°F is not recommended. Exposure to temperatures exceeding 150°F for prolonged periods is not recommended.


Solids 100% 100%
Color Clear Amber
Shelf Life 1 year 1 year
Mix Ratio 2.85:1 (A:B) Volume
3.33:1 (A:B) Weight
2.85:1 (A:B) Volume
3.33:1 (A:B) Weight
Viscosity 85 cps Brookfield
Pot Life 77°F 80 min. N/A
Tensile Strength 9,000 psi D-638
Flexural Strength 14,400 psi D-790
Compressive Strength 12,000 psi D-695
Bond Strength (Dry Concrete)  870 psi C-321
Bond Strength (Wet Concrete) 520 psi C-321
Elongation 9% D-638
*Slant Shear Dry Concrete 1985 psi C-882
*Slant Shear Water Saturated 1110 psi C-882
*Splitting Tensile Strength Air Dried Concrete 923 psi C-496
*Splitting Tensile Strength Water Saturated Concrete 703 psi C-496 (modified)

*Tested by U.S. Army Corps. Of Engineers. (REMR CS-11) | North America Customer Service: +1 (877) 423 6491

We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate, and is offered for consideration, investigation and verification by the user, but we do not warrant the results to be obtained. Please read all statements, recommendations, and suggestions in conjunction with our conditions of sale, which apply to all goods supplied by us. No statement, recommendation, or suggestion is intended for any use that would infringe any patent, copyright, or other third party right.

DE NEEF is a trademark, which may be registered in the United States and/or other countries, of GCP Applied Technologies Inc. This trademark list has been compiled using available published information as of the publication date and may not accurately reflect current trademark ownership or status.

© Copyright 2018 GCP Applied Technologies Inc. All rights reserved.

GCP Applied Technologies Inc., 2325 Lakeview Parkway, Suite 400, Alpharetta, GA 30009, USA
GCP Canada, Inc., 294 Clements Road, West, Ajax, Ontario, Canada L1S 3C6
This document is only current as of the last updated date stated below and is valid only for use in the United States. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.

Last Updated: 2023-06-28