DE NEEF® Pipe Plug

Unique kit composed of a 1-component polyurethane resin with accelerator, protective gloves and a bag of polyester fibres to stop water leaks through pipes, wire conduits, cable transits, etc.

Product Description

In its uncured state the 1-component resin grout is a dark brown, non-flammable liquid. When the product is mixed, and after being soaked into water, it expands and cures into a rigid closed-cell polyurethane foam.

Field of application

Designed to cut off water leaks through pipes, wire conduits, cable transits, etc.


  • Solvent free.
  • User friendly: all components in 1 kit.
  • The cured foam is resistant to most organic solvents, mild acids, alkaloids and micro-organisms.


Prepare the void or cavity to be filled by removing all dust and loose particles with compressed air or water. If, possible, insert a stopper at the rear end of the pipe to contain the expansion of the plug and densify the foam.
Spread the cables evenly to assure all-round penetration of the expanding plug.

1. Application procedure

  • Remove the large metal can from the box.
  • Put on the gloves.
  • Pour the content of the small plastic accelerator bottle into the large metal resin can.
  • Shake thoroughly.
  • Pour the mixed resin over the polyester fibres when they are still in the bag and soak the fibres by kneading well.
  • When a homogenous colour is obtained, the mixture is sufficiently kneaded.
  • Take the mixed fibre wad out of the bag and activate the plug by immersing in water. The plug must be soaked well to get a good activation.
  • Insert the plug as far as possible into the opening, immediately after soaking.
  • Exert pressure for a sufficiently long time to obtain a dense and closed cell foam.

Technical data / Properties

Property Value Standard
Free expansion after activation with water 5V Internal test


White polyester fibres.
Dark brown polyurethane resin.
Black transparent accelerator.


1 set expands 5 times in volume (60 to 90 seconds at 21°C).
A complete kit of DE NEEF® Pipe Plug is enough to block a tube with a diameter of 10 cm over a length of 70 cm. For larger pipe sizes, several kits may have to be used.


Cardboard box (35 x 25 x 24 cm) of 5 kits.


  • Component A: large metal can: content 450 g resin.
  • Component B: small plastic bottle: content 21 g catalyst.
  • 28 g polyester fibre wad.
  • 1 pair of gloves.

1 pallet = 40 boxes


DE NEEF® Pipe Plug is sensitive to moisture and should be stored in original packaging in a dry area. Storage temperature must be between 5°C and 30°C. 
Shelf life: 2 years.

Health and Safety

Users must read and understand the product label and safety data sheet (SDS) for each system component before use. All users should acquaint themselves with this information prior to working with the material. Carefully read detailed precaution statements on the product label and SDSs before use. The most current SDSs can be obtained from the GCP website at or by contacting GCP at +1-703-741-5970. | For technical information:

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 2021 GCP Applied Technologies, Inc. All rights reserved.

GCP Applied Technologies Inc., 62 Whittemore Avenue, Cambridge, MA 02140, USA

This document is only current as of the last updated date stated below and is valid only for use in Indonesia. 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: 2021-07-01