Top-Cast® Top-Surface Retarder

Product Description

Top-Cast® is a water-based, top-surface retarder which does not require covering with plastic for protection. It is available in 11 depths of etch, each one color and number coded for safety and convenience.

Product Uses

Ideal for poured-in-place flatwork and the top surface of precast panels. The wide selection of grades available provides a comprehensive range of effects, from a simulated light acid wash or sand blast finish up to full exposure of 1 1⁄4 in. (32 mm) aggregate.

Application Information

Always prepare small test panels to determine the most suitable grade to obtain the desired depth of etch. When pouring test samples, always simulate job site conditions as well as mix designs to be used on the project to establish the proper grade selection and procedures.

Application

In preparation for pouring of concrete, protect all curbs, borders, adjacent stones, pavers, etc. with a coat of PIERI® FACE-OFF™ surface protectant. Allow coating to dry before pouring concrete. Pour concrete and float or trowel finish.

Shake well before application. Apply Top-Cast® surface retarder uniformly to the wet concrete after the initial bleed water rises to the surface. Spray with a low-pressure sprayer (plastic preferred) until the surface has a complete hiding coat. Do not apply too sparingly. Use water for clean up. Once dry (i.e. 1–2 hours after application), Top-Cast surface retarder provides excellent protection against intermittent rain.

Removal

The retarded cement matrix is normally washed away the next day, using high-pressure water.

When using certain mix designs, especially in warmer temperatures, it may be necessary to remove the retarded matrix the same day for best results, particularly when using the lightest etches.

Coverage Rates

Top-Cast® surface retarder will cover approximately 200–300 ft2/ gal (4.9–7.4 m2/L).

Product Advantages

  • Comprehensive range of etch depths
  • Excellent depth of etch control
  • Color coded products
  • Heavily pigmented for ease of application
  • Excellent coverage rates
  • Solvent free, odorless
  • Heat resistance up to 150°F (65°C) 

Performance

Each product grade creates a unique degree of reaction to produce the desired effect on the surface mortar. The retarding chemicals diffuse into the paste during the first hours of curing and slow down the cement hydration reaction. During the next 16+ hours of curing the bulk concrete hardens, except where the cement matrix has been retarded. The retarded surface can then be removed by water or pressurized water, revealing the aggregate in the concrete mix.

Packaging & Handling

Top-Cast® surface retarder is available in 5 gal (19 L) and 55 gal (208 L) plastic containers.

Storage

Top-Cast® surface retarder has a shelf life of one year from date of manufacture, in closed original container.

All precautions defined on the SDS (Safety Data Sheet) for Top-Cast® must be followed.

Top-Cast® Grade Guide

*564 lbs/yd3 or 355 kg/m3 of cement

STONE SIZE GRADE
Acid Etch 03 Light Violet
Sand Blast 05 Powder Blue Violet
Up to 1/4 in. Up to 6.5 mm 15 Yellow
1/8 to 1/4 in. 3.0 to 6.5 mm 25 Beige
1/8 to 3/8 in. 3.0 to 9.5 mm 50 Canary Green
1/8 to 3/8 in. (3.0 to 9.5 mm) 75 Blue
3/8 to 1/2 in. (9.5 to 13 mm) 100 Gray
3/8 to 5/8 in. (13 to 16 mm) 125 Pink
3/8 to 5/8 in. (13 to 16 mm) 150 Green
5/8 to 1 in. (16 to 25 mm) 200 Salmon
1 to 3/2 in. (25 to 38 mm) 250 Orange

ca.gcpat.com | 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.

TOP-CAST, PIERI and FACE OFF are trademarks, 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., 62 Whittemore Avenue, Cambridge, MA 02140, USA

GCP Canada, Inc., 294 Clements Road, West, Ajax, Ontario, Canada L1S 3C6

Ce document est à jour seulement à la date de la dernière mise à jour indiquée ci-dessous et n'est valide que pour une utilisation au Canada. Il est important que vous consultiez toujours les informations actuellement disponibles sur l'URL ci-dessous pour fournir les informations les plus récentes sur le produit au moment de l'utilisation. Des documents supplémentaires tels que les manuels de l'entrepreneur, les bulletins techniques, les dessins détaillés et les recommandations détaillées ainsi que d'autres documents pertinents sont également disponibles sur www.ca.gcpat.com. Les informations trouvées sur d'autres sites Web ne doivent pas être utilisées, car elles peuvent ne pas être à jour ou applicables aux conditions de votre site et nous déclinons toute responsabilité quant à leur contenu. S'il y a des conflits ou si vous avez besoin de plus d'informations, veuillez contacter le service client de GCP.

Last Updated: 2018-12-12

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