Quick setting, cementitious, waterproof plugging compound for stopping flowing/seeping water entry into sub-structures


BETEC® Plug is a single-component quick-setting, waterproofing plugging compound supplied in 10 kg plastic buckets. When mixed with water, a plastic, highly workable mortar is formed which can be applied by hand to plug leaks in concrete and masonry structures.


  • Sealing leaking cracks/joints in concrete surfaces.
  • Plugging water leaks in masonry structures.
  • Sealing leaks in horizontal/vertical joints.
  • Bonding steel fixings/brackets to concrete.

System Components

  • BETEC® Plug - Quick setting, cementitious waterproof plugging compound.
  • BETEC® Flex - flexible cementitious waterproofing slurry.
  • BETEC® Seal - cementitious waterproofing slurry.
  • BETEC® NSM Mortars - cementitious mortars for repair/levelling of substrates prior to the application of BETEC® FLEX/Seal.


  • Can be applied directly to wet surfaces
  • Strong bond – will not be washed away under active water pressure
  • No efflorescence
  • No steel corrosion
Pack Size 10 kg
Mineral particle size < 0.15 mm
Mixed mortar density 2.2 kg/dm3
Workability at +20°C about 1 min.
Temperature of application > 5°C
Required water 0.16 litres per kg
Consistency Plastic
Resistance after 1 hour 8.0 N/mm2 DIN EN 196 T
Resistance after 1 day 12.5 N/mm2 DIN EN 196 T
Resistance after 28 days 30.0 N/mm2 DIN EN 196 T
A 10 kg pack of BETEC® Plug with water addition of 0.16 litres/kg will yield total volume of 5.2 litres (0.0052 m3) and/or 5.8 m length of 30 mm x 30 mm chase

All declared values shown in this data sheet are based on test results determined under laboratory conditions and with the product sample taken directly from stock in its original packing without any alteration or modification of its component parts.

Health and Safety

Read the product label and Safety Data Sheet (SDS) before use. Users must comply with all risk and safety phrases. SDS’s can be obtained from GCP Applied Technologies or from our web site at



Store in a cool dry place, in original packaging and use within 12 months. Protect against damage by frost if stored at low temperatures.

Substrate Preparation:

Remove all shutter release agents, bitumen, oil, grease, dirt, loose and degraded material, chase out all honeycombed/damaged concrete to a minimum depth of 30 mm. Rake out all leaking cracks and joints to form a minimum 30 mm x 30 mm chase.

All substrates should be pre-wetted with clean water to saturate the surface. Minimum average tensile strength of prepared substrate = 1.5 N/mm2.


BETEC® PLUG has a workability time of less than 1 minute at 20°C, so do not mix until you are ready to use the product. Suggested maximum quantity for mixing is O.5 kg. Water addition is 0.16 litres per kg of BETEC® PLUG. Use part mixes to avoid wastage. Add the powder to the water and mix by hand for approx 15 seconds.

Use lukewarm water in cold weather and cold water in warm weather.


Apply immediately by hand (only when wearing protective rubber gloves) or by trowel. Work the material quickly into the area to be plugged and hold firmly in place until the mortar sets. Do not move the mortar during the setting phase.

At horizontal/vertical joints form a 45° fillet.

When using BETEC® PLUG for steel fixings, drill a hole at least 20 mm diameter bigger than diameter of the fixing and of sufficient depth to support the fixing. Fill the hole fully with BETEC® PLUG and push the fixing into place centrally. Temporarily support the fixings until the mortar has fully set. | United Kingdom customer service: +44 (0) 1480 478421

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.

BETEC is 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., 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 the United Kingdom. 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: 2018-11-30