SINTA® 18 mm

Polypropylene Fibers

Product Description

SINTA® is a high-performance, monofilament, polypropylene fibre developed as a crack controlling additive for cementitious materials. It is used to inhibit the formation of small cracks which can occur through plastic shrinkage, premature drying and early thermal changes, in order to provide utilisation of the intrinsic properties of the hardened cementitious material.

SINTA® is based on selected raw materials and manufactured under controlled conditions to give a consistent product.

Specially designed for crack control in cementitious materials covering areas such as ready mix concrete, precast concrete, screeds, conventional shotcrete, rendering mortars, etc. Principle uses of fibre concrete include: concrete slabs, pavements, driveways, imprinted concrete, curbs, pipes, grouts, shotcrete, overlays, patch repair, microsilica concrete, thin section walling, water retaining structures, marine concrete, heavy industrial floors, etc.


  • Inhibits intrinsic cracking in concrete
  • Disperses uniformly throughout the mix
  • Improves finishing characteristics
  • Improves concrete durability
  • Increases impact and abrasion resistance
  • Rustproof
  • Impervious to alkali attack
  • Decreases construction time and labour
  • Reduced risk of subsequent damage

Typical Properties

Appearance Silvery white fibre, bundles.
Air Entrainment Nil
Air Entrainment Nil
Chloride Content Nil
Constituents Polypropylene
Fibre Length 18 mm
Fibre Thickness 18 microns
Specific Surface Area 225 m2/kg

Method Of Use

SINTA® is supplied ready for use, in concrete dispersible bags, which contain measured quantities for addition to the concrete mix either at the batching plant or on site. Fibres should be added to the cementitious matrix and mixed for 5 minutes to ensure full dispersion.

Under special circumstances it may be necessary to adjust the mode of addition and mixing cycle to suit specific applications.

The addition of SINTA® may produce a slight reduction in workability while increasing the cohesiveness of the mix. Serious overdosing of SINTA® will generally produce a reduction in workability and an increase in the cohesiveness of the mix.

Addition Rates

The performance of SINTA® is best assessed after preliminary trial mixtures both in the laboratory and on site, using the actual mix constituents under consideration to determine the effect on concrete properties.

As a guide to trials, a dosage level of 0.6 kg SINTA® per m3 is recommended.

For advice and assistance with trials we recommend that you consult GCP Applied Technologies.


With Cements:

SINTA® can be used with all types of cement, including limestone cement. It is also effective in concrete containing fly ash or ground granulated blast furnace slag.

For use with special cements we recommend you to contact GCP Applied Technologies.

With Other Admixtures:

SINTA® should not be pre-mixed with other admixtures.

The performance of the material may be affected by the presence of other chemicals and we would recommend that GCP be consulted in such circumstances.


SINTA® is available in convenient concrete dispersible bags which are added, unopened, to the truck or central mixer.

Health and Safety

For further information on Health and Safety matters regarding this product we recommend that you consult the relevant Safety Data Sheet from GCP Applied Technologies.

In line with general chemical handling precautions avoid contact with skin or eyes and protective gloves/goggles should be worn.


SINTA® is available in 0.6 kg concrete dispersible bags. All bags are supplied overpacked in cardboard boxes.


SINTA® requires no special storage facilities under normal winter conditions.

Technical Service

Our Technical Service department of GCP Applied Technologies is available to assist you in the correct use of our performance chemicals. | 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 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.

SINTA 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 (UK) Ltd., 830 Birchwood Boulevard, Birchwood, Warrington, WA3 7QZ United Kingdom

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 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: 2023-06-13