Sika MonoTop 630 Rapid

SKU id21540 Non Hazardous
A one component fast setting cementitious repair mortar, meeting the requirements of Class R4 of BS EN 1504-3.
Available in 25 Kg in Grey
£34.00 (£40.80 Inc VAT)

Product Description

Sika MonoTop 630 Rapid is a one component fast setting cementitious repair mortar, meeting the requirements of Class R4 of BS EN 1504-3.

Best Uses

Sika MonoTop 630 Rapid is ideal for repairing all types of concrete structures such as horizontal and vertical repairs, hand applied repairs and repairs of floor slabs and car park decks. Sika MonoTop 630 Rapid is suitable for exterior and interior use in place of R1, R2 & R3 mortars.

  • Pre-bagged for quality
  • Just add water
  • High early strength
  • Rapid setting
  • Contains no chloride admixtures
  • Non corrosive to steel
  • Can be overcoated

Application

Concrete:

The concrete shall be thoroughly clean, free from dust, loose material, surface contamination and materials which reduce bond or prevent suction or wetting by repair materials. De-laminated, weak, damaged and deteriorated concrete and where necessary sound concrete shall be removed by suitable mechanical or very high pressure water blasting techniques. Tying wire fragments, nails and other metal debris embedded in the concrete should be removed where possible.

The edges where concrete is removed should be cut at a minimum angle of 90o to avoid undercutting and a maximum angle of 135o to reduce the possibility of debonding with the top surface of the adjacent sound concrete and should be roughened sufficiently to provide a mechanical key between the original material and Sika® Repair material.

Ensure sufficient concrete is removed from around the full circumference of the reinforcement to allow application of the reinforcement corrosion protection coating (if required) and compaction of the repair material.

Steel Reinforcement:

Rust, scale, mortar, concrete, dust and other loose and deleterious material which reduces bond or contributes to corrosion shall be removed. Surfaces shall be prepared using abrasive blast cleaning or high pressure water-blasting techniques to a minimum standard of SA 2 (ISO 8501-1). Where exposed reinforcement is contaminated with chloride or other material which may cause corrosion, the reinforcement shall be cleaned by low pressure water blasting before application of reinforcement corrosion protective coating. Reference shall be made to EN1504-10 for specific requirements.

Sika MonoTop®-630 Rapid can be mixed with a low speed (< 500 rpm) hand drill mixer. In small quantities, Sika MonoTop®-630 Rapid can also be manually mixed.
Pour the recommended water in a suitable mixing container. While stirring slowly, add the powder to the water and mix thoroughly at least for 3 minutes adding additional water during the mixing time if necessary to the maximum specified amount and adjust to the required consistency.

Reinforcement Corrosion Protection Coating:
Where a reinforcement coating is required the application of a repair mortar shall be applied wet on dry onto the reinforcement corrosion protection. Refer to the System Information above for compatible Sika products and refer to the relevant Product Data Sheet for more detailed information about the reinforcement corrosion product.

Bonding Primer:
On a well prepared and roughened substrate a bonding primer is generally not required for this product. When a bonding primer is required, refer to the System
Information above for compatible Sika products and refer to the relevant Product Data Sheet for instructions. A small amount of Sika MonoTop®-630 Rapid can also be mixed slightly wetter than normal and used as a scratch coat to fill any deep cavities or pits in the base of the substrate. Any bonding primer shall be applied on a pre-wet substrate and subsequent application of the scratch coat /repair mortar shall be applied wet on wet onto the bonding primer.

Repair Mortar Application:
Sika MonoTop®-630 Rapid can be applied manually using traditional techniques. Thoroughly pre-wet the prepared substrate a recommended 2 hours before application. Keep the surface wet and do not allow to dry. Before application remove excess water e.g. with a clean sponge. The surface shall appear a dark matt appearance without glistening and surface pores and pits shall not contain water. When applying first make a scratch coat by firmly scraping the repair mortar over the base of the substrate surface to form a thin layer and fill any deep cavities. Ensure the whole surface to be repaired is covered by the scratch coat. For vertical applications, build up layers from bottom to top by pressing mortar well into the repair area. The surface can be finished according to the surface texture requirements using a float. Do not over-trowel as this may lead to surface cracking.

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