OPTEC® EC-642
Admixture for enhancing high-quality surfaces and reducing efflorescence
Product Description and Application
OPTEC® EC-642 is used for the production of coloured concrete products from no-slump or semi-dry concrete. The main fields of application include the production of paver blocks, kerbstones or slabs.
Technical Data
| Form | Fluid |
| Colour | Brown |
| Density | 1.01 ± 0.01 g/cm3 |
| pH-value | 10.0 ± 1.0 |
| Storage | Keep original containers closed, protect from excessive heat and frost. |
| Physiological effect | May irritate skin and eyes; see SDS (Safety Data Sheet). |
| Shelf life | approx. 1 year in closed original containers |
Mode of Action
Surface-active substances affect a better dispersion of the cement particles. The concrete becomes more homogenous and easier to compact, thereby increasing both green strength and ultimate strength. Close textured surfaces are promoted by the formation of slurries on the surface during vibration.
The integral hydrophobic components make the capillary pores water-repellent. The combined action of a denser concrete matrix, water repellency of capillary pores and plasticizing, the transport of moisture is reduced in the capillaries. Thus, the dissolved calcium hydroxide can only migrate in small quantities to the surface resulting in a reduced tendency to effloresce. Finished products are more uniform and more intense in colours.
Dosing and Special Information
Preliminary tests, according to official national standards, are always required before use!
OPTEC® EC-642 is added to the gauging water, however, it may also be dosed onto the aggregates. The concrete should be run as moist as possible in the block making machine in order to evenly increase the effect of OPTEC® EC-642.
gcpat.ae | United Arab Emirates customer service: +971 4 5139560
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.
OPTEC 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.
© Copyright 2018 GCP Applied Technologies Inc. All rights reserved.
GCP Applied Technologies Inc., 2325 Lakeview Parkway, Alpharetta, GA 30009, USA
P. O. Box 5006, Office 2104, 21 Floor, The Exchange Tower, Opp. JW Marriott Marquis Hotel, Business Bay, Dubai – United Arab Emirates
This document is only current as of the last updated date stated below and is valid only for use in the UAE. 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.ae. 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: 2022-11-18
https://gcpat.ae/en-gb/solutions/products/optec-ec-642