DARAPEL®
ntegral Water Repellent Admixture for Concrete
Product Description
DARAPEL® admixture is a stable dispersion of stearate and other water repellent compounds that is added to ready mixed concrete during mixing. DARAPEL is a ready to use, factory prepared liquid that will simplify handling and eliminate guesswork.
The addition of DARAPEL to the mix will provide hydrophobic, water-repelling, properties. The water insoluble components act as non-wettable lining on the walls of all pores and voids in the mix, making them water repellent. The DARAPEL “built-in” water barriers guard against damage caused by water infiltration.
Architects, engineers, contractors and other authorities agree that even good quality concretes, mortars, etc. that are properly placed, set or applied then cured, are inherently porous or permeable to water. The free passage of moisture occurs in pores formed during and after placing. DARAPEL forms an internal barrier against water transmission in mixes used for ready mixed or precast concrete.
DARAPEL can also be added to semi-dry concretes used in the production of masonry products. DARAPEL provides superior resistance to the penetration of moisture in concrete masonry units and reduces the incidence of efflorescence. DARAPEL has particular benefit when used in the production of blocks, bricks or paviour manufacture. It can also be utilised in various mortar mixes and semi-dry masonry units.
Product Advantages
The addition of DARAPEL will reduce the amount of water that permeates the concrete. Reducing the passage of water will provide beneficial advantages by:
- Increasing resistance to weathering - wetting and drying - freezing and thawing
- Increasing resistance to chemical attack
- Reducing the potential for efflorescence
- Reducing the probability of corrosion of embedded metal
- Improving colour fastness and colour density.
Typical Properties
| Appearance | white opaque liquid |
| Specific Gravity | 1.02 at 20°C1.02 at 20°C |
| Chloride Content | Nil |
| Freezing Point | 0°C |
Method of Use
DARAPEL is supplied ready for use, it should be added to concrete mixes, during the mixing process, preferably the same time as the mixing water. It should not be added directly to the cement. When used in wet concretes, it is necessary to reduce the free water content to obtain constant workability and to maximise the permeability reduction potential. If the free water content is not reduced, workability of the concrete may increase and a reduction in compressive strength will result. No extension of normal mixing time is necessary.
When used in wet concretes, it is necessary to reduce the free water content to obtain constant workability and to maximise the permeability reduction potential. If the free water content is not reduced, workability of the concrete may increase and a reduction in compressive strength will result. No extension of normal mixing time is necessary.
Compatibility with Cements
DARAPEL can be used with all types of Portland, Pozzolanic, Blast Furnace cements. It can also be used with fly ash and silica fume.
Compatibility with other Admixtures
DARAPEL should not be premixed under any circumstances with other admixtures. While some admixtures can be usefully combined within the same mix the performance of this product may well be affected by the presence of other chemicals and we recommend that GCP Applied Technologies be contacted for advice in all such circumstances.
Addition Rates
Range: 200 ml–1000 ml per 100kg of cement
Addition rates outside of the recommended dosage range may be used for special concrete applications. In such circumstances it is important to conduct preliminary trials on the actual mix constituents to assess the effect of the properties of the concrete at the dosage level specified.
DARAPEL® can be added to mixes containing other GCP Admixtures. Testing with actual materials should be done to determine performance. Each admixture must be added separately to the mix. Do not allow any of the admixtures to contact each other before they enter mix.
Effects of Overdosing
Overdosing of DARAPEL will generally produce a significant increase in workability which could possibly be accompanied by a reduction in compressive strength. Additional delays in concrete setting time could result, especially when sulphate resisting cement is utilized.
Dispensing
It is preferable that liquid admixtures for concrete should be introduced into a mixer by means of automatic dispensing equipment, details of which are available upon request.
Health and Safety
For further information see DARAPEL SDS (Safety Data Sheet) or consult GCP.
Packaging
DARAPEL is supplied in 210 litre free, non-returnable containers. Alternatively, bulk deliveries can be arranged.
Storage
DARAPEL should be stored above 3°C. Below this temperature the product will cloud and at lower temperatures gel. DARAPEL, in common with most emulsions, is seriously affected by freezing. This is irreversible damage and cannot be reconstituted on thawing.
DARAPEL should be stored in original containers or suitable closed tanks, preferably out of direct sunlight and protected from extremes of temperature.
Storage Life in Manufacturer’s Drums:
12 months from the date of manufacture
Storage Life in Bulk Storage:
12 months from the date of delivery
Technical Service
The Technical Service Department of GCP is available to assist you in the correct and best use of our products. These resources and advice are at your disposal entirely without obligation. Please contact:
GCP
Emirates Chemicals LLC
Festival Tower, Suite 1701
Dubai Festival City P.O. Box 5006
Dubai, United Arab Emirates
Tel: +971 4 2329901
Fax: +971 4 2329940
Email: meinfo@grace.com
gcpat.uk | 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 donot 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.
DARAPEL 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 publishedinformation as of the publication date and may not accurately reflect current trademark ownership or status.
© Copyright 2020 GCP Applied Technologies Inc. All rights reserved.
GCP Applied Technologies (UK) Ltd, Gate St, Dukinfield SK16 4RU.
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 www.gcpat.uk. 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: 2022-11-24
https://gcpat.uk/en-gb/solutions/products/darapel