Surface retarders are used to create exposed-aggregate concrete surfaces by means of both the positive (top side) and negative (within formwork) application methods. The retarder prevents a certain depth of the cement paste from setting on the surface of the concrete. This uppermost layer of the concrete matrix is then easily removed by pressure washing, exposing the aggregate within the concrete.

Areas of Application:

• Pre-cast elements
• Concrete products
• In-situ elements

Our surface retarders are available as solvent-based products for negative application (in the formwork) or water-based for positive application (top-side). Both are available with varying depths of wash from 0.2 mm to 7 mm, giving you a wide range of choice.

Surface Retarders – Product Brochure

Technical Datasheet Amitol

Technical Datasheet Heratol

Application Video Amitol