Expoze Retarder 20 L

Expoze Retarder is a water‑based concrete surface retarder specifically formulated to produce exposed aggregate finishes by delaying the surface setting of fresh concrete while allowing the underlying concrete to cure normally.

Description & Function

Delays surface mortar set: applied after finishing, it prevents the top layer of cement paste from hardening too quickly, enabling controlled aggregate exposure upon washing.
Easy application: use a low‑pressure sprayer, roller or brush to achieve uniform coverage before the concrete loses its sheen.
Removable by washing: once the subsurface has developed sufficient strength (typically 8–24 hours depending on weather), the soft surface layer is washed off with water or pressure washer, revealing the aggregate.

Performance & Coverage

Coverage rate: approximately 4–5 m² per litre, equating to 80–100 m² per 20 L container—coverage may vary based on surface texture and porosity.
Depth of exposure: 2–6 mm typical, influenced by finish type—e.g. wood‑float vs steel‑trowel—and environmental conditions.

Comparison with Similar Products

Product	Packaging	Coverage	Exposure Depth
Expoze Retarder	20 L	~80–100 m²	~2–6 mm
EZ EXPOSE (Euclid)	18.9 L	4.3–7.4 m²/L	Micro‑etch to deep
Beton Xpose	up to 20 L	—	12–24 h delay

Applications

Ideal for horizontal concrete surfaces such as driveways, patios, sidewalks, pool surrounds and precast panels, where a decorative exposed aggregate finish or improved mechanical key is desired. Acts as a cost‑effective alternative to mechanical abrasion or acid etching.

Usage & Storage

Apply after bleed water dissipates but before final set.
Ensure consistent spray coverage—two light passes better than one heavy coat.
Wash off when surface is firm but before the concrete fully hardens—typically 2–14 hours in warm conditions, or up to 24 hours in moderate climates.
Clean tools with water immediately after use.
Shelf life: about 12 months in sealed container, when stored between 5 °C and 35 °C.

The Expoze Retarder 20 L delivers a reliable method for crafting exposed aggregate concrete finishes. With controlled surface delay, generous coverage, and simple water-based removal, it offers a cost-effective, visually appealing solution for decorative concrete.