Grace Top-Cast Exposed Aggregate Products & Sealer
Description
Grace Top-CastTM is a water-based top-surface retarder. It 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.
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 32 mm (11⁄4 in.) aggregate.
Product Function
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 is then removed by water or pressurized water, revealing the aggregate in the concrete mix.
Coverage Rates:
Grace Top-Cast will cover approximately 175 – 300 square feet per gallon.
Grace Top-Cast Grade Guide
(Based on 6 sack Mix*)
Stone Size |
Grade |
Acid Etch |
03 Light Violet** |
Sand Blast |
05 Powder Blue Violet** |
Up to 6.5mm
Up to 1⁄4 in. |
15 Yellow |
3.0 to 6.5 mm
1⁄8 to 1⁄4 in. |
25 Beige |
3.0 to 9.5 mm
1⁄8 to 3⁄8 in. |
50 Canary Green** |
3.0 to 9.5 mm
1⁄8 to 3⁄8 in. |
75 Blue** |
9.5 to 13 mm
3⁄8 to 1⁄2 in. |
100 Gray |
13 to 16 mm
3⁄8 to 5⁄8 in. |
125 Pink** |
13 to 16 mm
3⁄8 to 5⁄8 in. |
150 Green |
16 to 25 mm
5⁄8 to 1 in. |
200 Salmon |
25 to 38 mm
1 to 11⁄2 in. |
250 Orange |
*564 lbs/cubic yd
**In Stock – others would be special orders
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