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Levelling Mortars for Concrete Repair
Levelling Mortars for Concrete Repair are thin layer mortars that are normally 'slurry' applied to make good, level and improve a concrete surface as part of a concrete repair and protection system. The levelling mortar fills and levels any surface defects, such as blowholes and shinkage cracks etc, which also helps to seal and level the surface, can increase the resistance to carbonation, water penetration and chemical attack, plus this creates a uniform and level surface profile and texture as a finish in itself. Alternativly this surface sealing and levelling provides the ideal substrate for application of a protective coating product or system.
Sika MonoTop-620 Levelling Mortar

Sika MonoTop-620 is a one component, polymer modified, cement based concrete levelling mortar, which is designed for use as a a thin layer render or concrete pore sealer/levelling mortar/smoothing coat /fairing coat - particularly in concrete restoration and repair works. Sika MonoTop-620 is part of the Sika MonoTop concrete repair sytem and conforms to the requirements of European Standard EN 1504 Part 2

Sika MonoTop-620 can also be used to repair minor surface defects in concrete structures and it also provides additional surface protection against aggressive atmospheric influences such as carbonation and moisture or chloride ingress. It is frequently used in new and existing structures to repair honeycombed areas of the concrete finish.

This levelling mortar is easy to use as it is pre-bagged for quality control, has no solvent or VOC's so it can be used internally as well as externally, mixing is easy - just add water. The mixed material can then be applied by hand / trowel or it can be sprayed by the 'wet-spray' method.

When cured Sika MonoTop-620 forms an ideal substrate for the aplication of Sikagard protective coatings. 

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SikaTop Seal-107
SikaTop Seal-107 is a two part, polymer modified, cement based, waterproof levelling mortar for concrete refurbishment and a slurry coating for waterproofing and tanking works. It is totally pre-batched for Quality Control and consists of a liquid polymer with additional admixtures together with a special powder mix of blended cement, aggregates and other additives.

SikaTop Seal-107 is used for the protection of concrete structures against the effects of de-icing salts and freeze-thaw attack, plus pore / blowhole filling / sealing fine “hairline” cracks in concrete structures (not subject to movement)as a levelling mortar during concrete repair and protection works.

SikaTop Seal-107 is also used for the rigid waterproofing of basement walls in both new construction and refurbishment through both internal and external application for the waterproofing and damp-proofing of concrete, cement rendering, brickwork and blockwork structures.

In a combination of both of these applications, SikaTop Seal-107 is used as the 'industry standard' for the refurbishment and waterproofing of concrete surfaces in reservoirs and other drinking storage tanks subject to positive water pressure' (DWI Approved for Potable / Drinking water contact).

SikaTop Seal-107 is easy to apply by brush or trowel, but can also be wet spray applied and trowel finished. On exposed concrete surfaces SikaTop Seal-107 provides significant protection against carbonation and water ingress and can be overpainted with Sikagard protective coatings for additional protection or decorative purposes.


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SikaTop-121 is a two component, polymer modified, cement based, bonding bridge and waterproof mortar comprising of a liquid polymer incorporating admixtures and a special cement based powder mix.

SikaTop-121 is designed as a multi-pupose product with its main uses being as a bonding bridge primer for SikaTop repair mortars, a concrete repair smoothing coat/levelling mortar, a waterproof and watertight tile adhesive and as a waterproof tanking layer for lift pits and tanks etc. against ground water ingress into them and equally for water tanks, pools, etc, against leakage out of them. As a waterproofing material SikaTop-121 is normally applied on the positive pressure side in contact with the water, inorder to minimise water ingress into the structure.

SikaTop-121 is totally pre-batched for Quality Control and no additional water is required and should not be added on site.

SikaTop-121 is part of the SikaTop Concrete Repair System, it is BBA approved and also DWI Approved for use in contact with drinking water.

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