The concrete surface retarder is a water-based, paste-type deactivator designed for creating exposed aggregate finishes on horizontal or vertical concrete surfaces. When applied to the formwork, it temporarily delays the surface setting of concrete, allowing easy removal of the surface mortar after curing. This process reveals clean, decorative aggregate and ensures excellent bonding for precast elements or in-situ concrete joints.
Product Introduction
When applied to the formwork, it temporarily delays the surface setting of concrete, allowing easy removal of the surface mortar after curing. This process reveals clean, decorative aggregate and ensures excellent bonding for precast elements or in-situ concrete joints.
Designed for precast panels, bridge joints, permeable pavements, and decorative concrete.
1.Water-Based & Eco-Friendly: Safe to use, non-toxic, and VOC-free formulation.
2.Exposed Aggregate Retarder: Delivers consistent exposed finishes without acid washing or mechanical chipping.
3.Controlled Depth Etching: Adjustable etching depth up to 10 mm for bonding or architectural finishes.
4.No Impact on Strength: Does not compromise compressive strength or steel reinforcement bond.
5.Wide Compatibility: Suitable for use with steel, wood, or bamboo formwork.
6.Effective Under Heat or Steam Curing: Works even under high-temperature or precast plant conditions.
7.Labor-Saving: Eliminates mechanical roughening, reducing labor and equipment cost.
Product Parameters
| Property | Value |
| Appearance | Milky white, homogeneous paste |
| pH | 6–8 |
| Open Time | ≥10 hours |
| Retardation Time | ≥72 hours (room temperature); ≥12 hours (at 60°C) |
| Etching Depth | 1–10 mm (adjustable based on application thickness) |
| Impact on Final Concrete Strength | None |
| Storage Stability | No separation or precipitation |
Product Usage
1.Precast Concrete Panels & Modular Connections.
2.Bridge Deck Joints & Panel Interfaces.
3.Permeable Concrete Pavements with Exposed Aggregate.
4.Architectural Finishes in Vertical or Sloped Elements.
5.Steam-Cured or Accelerated-Cured Components.
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Our products have undergone rigorous testing at our national testing laboratory (CABR testing center co., ltd). Renowned Fortune Global 500 firms such as China Railway Group Limited, China Communications Construction Company Limited, and Sinohydro are among our esteemed clients.
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