Question 1

What is Fosroc Renderoc?

Accepted Answer

Fosroc Renderoc is a range of high-performance cementitious repair mortars used for concrete reinstatement. They are suitable for a variety of applications including hand-applied concrete repairs, form and pour concrete repairs, and sprayed concrete repairs.

Question 2

What are the main uses of Fosroc Renderoc products?

Accepted Answer

Fosroc Renderoc products are used for repairing voids, blowholes, and damaged concrete on vertical and overhead surfaces. They can be applied from a feather edge up to 3mm thickness. Renderoc mortars are also used for reinstating horizontal concrete surfaces.

Question 3

What are the advantages of Fosroc Renderoc products?

Accepted Answer

Fosroc Renderoc products are easy to use, provide high bond strength, and are cost-effective. They conform to the requirements of BS EN 1504-3 for concrete repair materials.

Question 4

How do I prepare the surface before applying Fosroc Renderoc?

Accepted Answer

The surface should be clean, and free from dust, unsound material, plaster, oil, paint, grease, corrosion deposits, or algae. Roughen the surface to remove laitance and expose the fine aggregate by light scabbling or grit-blasting. No independent priming system is required.

Question 5

What are the precautions for low and high temperature working with Fosroc Renderoc?

Accepted Answer

For low temperature working below 5°C, use warm mixing water up to 30°C and adopt normal precautions for winter working. For high temperatures working above 35°C, store the material in the shade and use iced water for mixing.

Question 6

How do I cure Fosroc Renderoc after application?

Accepted Answer

Correct curing is essential for optimum performance. Leave the formwork in place until the compressive strength reaches 10MPa. After striking the formwork, thoroughly soak the repair with clean water and spray with a liquid curing membrane like Concure A99.

Question 7

Can Fosroc Renderoc be overcoated with protective finishes?

Accepted Answer

Fosroc recommends using the Dekguard range of protective, anti-carbonation coatings over the repair area to provide a decorative and uniform appearance and protect the structure from the environment.

Fosroc Renderoc BF2, 21.66kg, High-Performance Concrete Repair Mortar

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