Set retarder for centrally-produced extended life mortar

Product Description

MORTARD® E is a ready-to-use aqueous solution of chemical compounds that provide extended life, increased workability and greater compressive strengths of Portland cement-based masonry mortar.

Product Advantages

  • Ready-to-use
  • Produces batch plant extended life mortar
  • Enhances workability and boardlife of job site mixed mortars
  • Can be used in stucco scratch and finish coats
  • Aids in greater color uniformity


The masonry construction industry’s need for job site mixing of mortar has typically been satisfied by proportioning with shovels or pails. This requires the maintenance of a site stockpile of sand and cementitious materials as well as mixers and mixer personnel. Extended life mortar utilizing MORTARD® E eliminates these needs and at the same time increases productivity while providing mortar consistency and uniformity; a requirement for quality masonry work.

MORTARD® E is primarily used in centrally produced (batch plant) extended life masonry mortar. However, due to its unique formulation, MORTARD® E may also be used in job site mixed mortar to enhance mortar boardlife and workability during warm weather construction.

MORTARD® E is used to provide extended life in Portland cement/ lime mortar as well as in masonry cement and mortar cement mortars. Other uses for MORTARD® E include Portland cementbased stucco scratch and surface coats. MORTARD® E is also used in colored mortar and assists in greater color uniformity.

Product Function

MORTARD® E provides extended mortar life, disperses cement particles, and allows for more complete cement hydration and greater compressive strengths. Through its retarding action, MORTARD® E will maintain the plasticity of the mortar while in bulk storage.

Upon application of the mortar, the masonry units absorb the mixing water causing the mortar to stiffen without setting. It should not be necessary to re-temper the mortar to maintain workability or trowelability. But in general, minimal re-tempering will not impair quality.

Application Information

MORTARD® E is compatible with other GCP admixtures, but they must be added separately to the mix. Additionally, testing with the specific materials is recommended to ensure the results obtained are acceptable.

Addition Rates:

The addition rate of MORTARD® E will depend upon the workability required for specific job conditions. For batch plant produced extended life mortar, using a specific set of materials, a 12 fl oz/100 lbs (780 mL/100 kg) of cement addition rate has produced 36-hour mortar.

The addition rate of MORTARD® E for job site mixed mortar shall not exceed 2 oz/bag (60 mL/bag) of masonry or mortar cement based mortar and 3 oz/bag* (90 mL/bag*) of Portland cement/lime based mortar (*Portland cement only). For job site produced stucco, follow the dosage rates provided above. It is recommended that the exact addition rate be determined by testing with the actual materials under job site conditions.

Packaging and Handling

MORTARD® E admixture is available in 3.5 U.S. gal (13 L) pails weighing approximately 36 lbs (16 kg), 55 U.S. gal (210 L) drums weighing approximately 600 lbs (273 kg) and 275 U.S. gal (1,040 L) returnable totes weighing approximately 2,960 lbs (1,340 kg). One gallon weighs approximately 9.6 lbs (4.4 kg).

MORTARD® E will freeze at approximately 32 ºF (0 ºC), but will return to full effectiveness after thawing and thorough mechanical agitation.

Health & Safety

All precautions defined on the SDS (Safety Data Sheet ) for MORTARD® E must be followed. | North America customer service: 1-877-4AD-MIX (1-877-423-6491)

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. 

MORTARD 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, Suite 450, Alpharetta, GA 30009, USA
GCP Canada, Inc., 294 Clements Road, West, Ajax, Ontario, Canada L1S 3C6.
This document is only current as of the last updated date stated below and is valid only for use in the Canada. 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: 2023-06-29