Yes, the concrete patch dries hard. Concrete patching materials are formulated to cure and harden, just like regular concrete. The hardness and strength of the cured patch will depend on several factors, including the specific patching product used, the curing process, and the application technique. Here are some key points to consider:

Material Type: The hardness of the cured concrete patch depends on the type of patching material used. Common patching materials can include cement-based products, epoxy-based products, or polymer-modified compounds. Epoxy-based patching compounds, for example, tend to provide a very hard and durable surface when cured.

Curing Process: Proper curing is essential to achieve the desired hardness. Curing involves maintaining the right moisture levels and temperature during the initial drying period. Follow the manufacturer’s recommendations for curing the specific patching material you use.

Application Technique: The application technique, including the thickness of the patch and how well it’s compacted and finished, can impact the final hardness of the patch. Proper surface preparation and application practices are crucial.

Patch Thickness: Thicker patches may take longer to fully cure and harden, so it’s important to follow the manufacturer’s guidelines for maximum patch thickness and curing time.

Sealing (Optional): In some cases, a concrete patch may be sealed after it has fully cured to provide an extra layer of protection and enhance the surface’s hardness and durability.