DAREX® AE S45 is a synthetic foam concentrate used to produce a prefabricated foam for blending with easy, workable ready-mixed mortars and lightweight concrete with a low gross density. It complies with BSEN 934-1-2008. One litre weighs approximately 1.010 ± 0.02kg.
Aerated lightweight concrete is used as a filling material in underground and channel construction, sub-concrete in road constructions, as a lightweight insulating and equalising layer for floors and flat roofs as well as an insulation layer in under and over ground works.
Foams produced with Darex AE S45 are characterised by a high stability of the air pore system in mortar and lightweight concrete. Lightweight concrete produced with Darex AE S45 flows very easily. If the starting consistency of the concrete is stiff, the spread can be increased by about 30cm, depending on the amount of foam added. If the starting consistency is soft, the entrained foam will have a stabilising effect so that segregation of the system is avoided.
Please refer to the Material Safety Data Sheet (MSDS) for health, safety and handling of the product.
The dosage of Darex AE S45 and of the premixed foam is directly effected by a foam generator into the starting mix. For this, the Darex AE S45 concentrate is premixed automatically at a ratio of 1:40 mass parts with water and foamed by compressed air. The required quantity of foam depends on the required gross density of the aerated lightweight concrete. The blending time of the premixed foam depends on the mixer and on the foam quantity. A homogenous starting consistency is required.
| Effective component | Tenside |
| Form | Liquid |
| Colour | Colourless to light yellowish |
| Density | 1.010 ± 0.02g / cm3 |
| Freezing point | Approx. -3oC |
| pH-value | 9.5 ± 1 |
| Storage | Keep well closed in original containers. Protect from excessive heat protect and absolutely from frost. Attention: the product becomes unusable when exposed to frost. |
| Recommended dosage | The foam generator should be adjusted, such that Darex AE S45: Water is in the ratio (by weight) of 1:40, to produce the necessary foam. 1kg Darex AE S45 can produce approximately 600dm3 of foam, with foam density of approximately 60-70g/dm3. |
| Delivery form | 120kg drums; 23kg cans |
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.
Darex 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.
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GCP Applied Technologies Inc., 2325 Lakeview Parkway, Alpharetta, GA 30009, USA
Saint-Gobain Concrete and Cement Solutions (HK) Limited, 6 On Chuen Street, On Lok Tsuen Ind Area, Fanling, Hong Kong
This document is only current as of the last updated date stated below and is valid only for use in Hong Kong. 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.hk. 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: 2026-06-11
https://gcpat.hk/en-gb/solutions/products/darex-ae-s45