Set-retarding admixture

Product Description

DARAMENE® 1000 set-retarding admixture is a ready-to-use aqueous solution of chemical compounds specifically designed to retard cement hydration. DARAMENE® 1000 is typically added to the concrete mix at the time of batching. The ingredients are factory pre-mixed in exact proportions under strict quality control to provide uniform results. One litre weights approximately 1.10kg. DARAMENE® 1000 complies to AS1478.1-2000 as a Type Re.


DARAMENE® 1000 is recommended for all types of concrete requiring additional retardation, such as:

  • Tremie mixes
  • Spraying applications
  • Long life concrete

Product Advantages

  • Reduce risk of lost concrete due to transport or project delays.
  • Consistent concrete spraying conditions regardless of variable batching times.
  • More flexibility in batching concrete in advance for unusually long retardation requirement.

DARAMENE® 1000 is ideal for use in applications where additional retardation is required to extend the workability of the concrete. It provides flexibility in many applications requiring long retardation periods.

DARAMENE® 1000 can be used with sprayed concrete. An accelerator added at the spray nozzle will reverse the stabilisation effect of DARAMENE® 1000. GCP Applied Technologies recommends the use of TYTRO® SA 530 or TYTRO® SA 535 alkali-free accelerator.

Dosage Levels

Addition rates for DARAMENE® 1000 will typically range, depending on application and circumstances, as follows:

  • Tremie mixes
    • 100 - 300mL / 100kg
  • Spray applications
    • 200 - 500mL / 100kg
  • Long life concrete
    • 100 - 500mL / 100kg

The amount to be used will depend upon the degree of additional retardation required under job conditions. Longer delivery times or higher temperatures will require higher addition rates. Conversely, the addition rate will be lower for shorter extensions  of time. Addition levels should be reviewed with you local GCP representative.

Pre-project trials should be completed in all new applications.

Admixture Compatibility

DARAMENE® 1000 is compatible with concrete admixtures from GCP Applied Technologies and other types of concrete admixtures.

Dispensing Equipment

Please contact your local GCP representative for further information regarding the dispensing equipment for this product.


DARAMENE® 1000 is available in bulk and 205L drums. The product will begin to freeze at about -2°C, but will return to full strength after thawing and thorough agitation.

Health and Safety

See Material Safety Data Sheet or consult GCP Applied Technologies.


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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.

DARAMENE and GECEDRAL 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 2019 GCP Applied Technologies, Inc. All rights  reserved.

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

Printed in Australia

This document is only current as of the last updated date stated below and is valid only for use in Australia. 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 www.gcpat.com.au. 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: 2019-06-05