DE NEEF® Washing Agent Data Sheet

Product Description

DE NEEF® Washing Agent is a non-flammable solvent mixture for cleaning polyurethane grout pumps and equipment. DE NEEF® Washing Agent is composed of a mixture of organic solvents with high dissolving properties for liquid polyurethane products.

Product Advantages

  • Non-flammable
  • Anhydrous

Product Application

  • Flushing out and cleaning pumps and lines used to inject polyurethane grouts.

Packaging & Handling

5 Gallon metal pails, closed head with a flex spout.


  1. Pour Urethane grout from original container into an open top bucket. Add the catalyst and stir it into the grout slowly for 2 - 3 minutes.
  2. Place the main pickup line into the urethane grout.
  3. Place the prime line into the trash bucket.
  4. Turn on the prime switch to prime. Let it run until the DE NEEF® Washing Agent runs out and urethane grout starts running through the prime line. Turn prime switch off.
  5. Place the prime line into the urethane grout.
  6. Point the gun into the trash bucket and pull the trigger. Let it run until clear Washing Agent turns amber. You are now ready to grout.

Pump Start Up

For most pumps, there are two separate lines.

  • Main pickup line (large line)
  • Prime line (small line)

The main pickup line sucks the material into the pump. The prime line is the smaller tube running alongside the main line. The objective is to NOT contaminate the DE NEEF® Washing Agent with either water or urethane grout.

You will need two buckets:

  • One empty bucket that will be the trash bucket.
  • One bucket filled with 3/4 gallon DE NEEF® Washing Agent.
  1. Separate the main pickup line from the prime line.
  2. Place the main pickup line into the DE NEEF® Washing Agent.
  3. Place the prime line into the trash bucket.
  4. Start the pump.
  5. Turn the prime switch to prime.
  6. Let the prime line run into the trash bucket for 5 - 10 seconds. While the DE NEEF® Washing Agent is still running, move the prime line over into the DE NEEF® Washing Agent bucket. Let it run for about 1 minute. A steady flow of DE NEEF® Washing Agent should be running out of the prime line.
  7. Turn prime switch off. Pump should now be ready with DE NEEF® Washing Agent in the injection hose.
  8. Point the grease gun into the trash buckePull the trigger and let it run for 5 - 10 seconds. Release the trigger and point the gun into the DE NEEF® Washing Agent bucket. Pull the trigger and let it run for 1 minute.

Pump Shut Down

  1. Repeat this process using the DE NEEF® Washing Agent.
  2. Clean the prime line for 3 - 4 minutes.
  3. Switch to the main pickup line.
  4. Run the remaining urethane grout into the trash bucket.
  5. When it runs with DE NEEF® Washing Agent, recirculate Washing Agent for 3 - 4 minutes.

Health and Safety

Avoid repeated inhalation of large quantities: If necessary, wear a mask (for organic vapors). Do not spray if sufficient ventilation is unavailable. Observe all safety rules as noted on the label. Always use protective clothing, gloves and goggles consistent with OSHA regulations during use. Avoid eye and skin contact. Do not ingest. Refer to Safety Data Sheet (SDS) for detailed safety precautions. SDS’s can be obtained from GCP Applied Technologies or from our web site at

For emergencies, call CHEMTREC: 1-800-424-9300.


Limited effect on cured polyurethane resin.


Specific Density Approx. 9.6 lbs/gal
Appearance Clear Liquid
Flashpoint 225ºF

Note: The data shown above reflects typical results based on laboratory testing under controlled conditions. Reasonable variations from the data shown above may result. | 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 475, 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: 2024-06-21