Hydrophillic Rubber Strip

Product Description

SWELLSEAL® Joint is a vulcanized hydrophilic expansive rubber strip with a center pressure compensating tube for the sealing of concrete construction joints, pipe penetrations and joints in underground pre-cast elements. The flexible coextruded strip is a combination of chloroprene rubber and hydrophilic resin. SWELLSEAL® Joint has an inner pressure-balancing zone which is also hydro-expansive, ensuring a perfect seal. The orange shoulder has a swelling capacity of up to 540% in contact with water. The black compression zone has a swelling capacity of 100%.

Product Advantages

  • Proven track record in structures subject to high water pressure
  • Non-sag when correctly placed around pipes and in vertical joints
  • Easily installed by nailing or using SWELLSEAL® WA
  • Chemically inert and resistant to petroleum, mineral and vegetable oils and greases
  • Exerts the least amount of expansion pressure of the SWELLSEAL® preformed waterstop line
  • Reversible swelling properties

Product Application

  • Sealing joints between concrete pre-cast-elements (inspection shafts, sewers, collectors)
  • Sealing smooth cold and construction joints
  • Sealing pipe penetrations and block-outs


Elongation at break Black tube 610% Orange shoulders 670% ASTM D412
Shore A Hardness Black tube 53 Orange shoulders 50 ASTM D2240
Specific density 1.23-1.27 ASTM D471
Swelling capacity of black compression zone 50% (1 day)
100% (4 days)
Swelling capacity of orange hydrophilic zone 220% (1 day)
540% (4 days)
Tensile Strength Black tube Tensile strength Orange shoulders 1,706 psi
1,308 psi
Appearance Orange/black rectangular strip  
Dimensions 1” x 5/16” (25mm x 7mm)  

Note: The data shown above reflects typical results based on laboratory testing under controlled conditions. Reasonable variations from the data shown above may result.

Packaging & Handling

1 roll SWELLSEAL® 2010 = 32.8 ft (10 m).

1 case SWELLSEAL® 2010 = 3 rolls (15 lbs).

Unlimited shelf life when stored in a dry place in its original packaging.

Installation Guidelines

Prior to the installation of SWELLSEAL® Joint, the surfaces should be level, dry, clean and free of oils, dust and laitance.

SWELLSEAL® Joint can only function properly in a confined space in order to develop sufficient expansion pressure and ensure waterproofing.

The expansion of SWELLSEAL® Joint will create pressure, which needs to be counteracted by at least 3 3/4 ” of concrete cover on all sides (installation in the middle of the joint is preferred between the rows of rebar). SWELLSEAL® Joint can be applied on both smooth and rough concrete.

On smooth concrete:

Roll the SWELLSEAL® Joint between the inner and outer rebar and nail down with a gun (4 to 5 nails per yard) or use SWELLSEAL® WA.

On rough concrete:

Gun SWELLSEAL® WA in a 3/8” bead between inner and outer rebar. Press SWELLSEAL® Joint firmly into the mastic or epoxy. For vertical applications, apply extra nailing (4 to 5 nails per yard).

Install SWELLSEAL® Joint with smooth surface upwards. Installation during rain or in prolonged contact with water can result in a premature swelling of the strip, which should be avoided.

If SWELLSEAL® Joint is exposed to water prior to encapsulating in concrete, the strip must be allowed to dry and shrink back to its original configuration. Roll ends are simply butted together to ensure a waterproof seal. Do not install in overlap. The strip needs to be in contact with the joint over its full length.

Health and Safety

Always use protective clothing, gloves and goggles consistent with OSHA regulations during use. Avoid eye and skin contact. Do not ingest. Refer to SDS (Safety Data Sheet) for detailed safety precautions. SDS’s can be obtained from GCP Applied Technologies or from our web site at


Requires 3 3/4” concrete cover on all sides. Avoid installation during heavy rain. Use only in tight joint applications such as between precast members or poured concrete. | North America customer service: 1-877-4AD-MIX (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 and SWELLSEAL are trademarks, 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 450, 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 Canada. 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: 2023-06-29