COUPSYL® LS-HARDENER concrete surface hardening and polishing liquid is colorless, transparent and completely mineral. This product penetrates into the tissue of building material surfaces while performing the reaction of calcium particles in the texture of the material, blocking the pores of the capillary tubes and does not allow water or steam and oil particles to penetrate. It also increases the luster, dust removal and impermeability of concrete surfaces.

This product is also known in the market as silicate absorption sealer, concrete sealer, liquid concrete hardener, single partial silicate sealer and concrete polish.

مایع سخت کننده بتن ls-hardner

Physical and chemical characteristics

Features and benefits

LS-HARDENER features and benefits:

  • Lithium base and high penetration power
  • Fully absorbent and penetrating power from 5 to 10 mm in concrete, plaster, brick and …
  • Durability and permanent stability
  • Improving the abrasion resistance of concrete surfaces
  • Water-based and oil-free solvents (environmentally friendly)
  • unflamable
  • Heat resistant up to 400. C
  • Absorb free lime and control dandruff
  • The power of filling pores and capillaries and microscopic channels of concrete, brick and stone
  • Ability to increase concrete density
  • Possibility of reviving old concrete surfaces and re-reinforcing them
  • Concrete sealant
  • Possibility to control negative water pressure
  • Failure to participate in alkaline silica concrete reaction


Among the uses of LS-HARDENER:

  • shining old and new concrete surfaces (glossy, anti-wear and impermeable)
  • Hygienic concrete floors
  • Waterproofing concrete tanks for water and elevator shafts
  • Building seals, brick cement and ceramic tiles
  • Anti-efflorescence and waterproof primer before concreting and repairing concrete
  • Increased abrasion resistance and anti-dusting of old concrete surfaces
  • Increase the hardness of concrete surfaces and floors
  • Polishing and anti-dusting concrete floors with COUPSYL® LS-DENSIFIER prevent the growth of fungi, mosses and lichens on the surface
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Methods and tools of consumption

Step 1: Repair, prepare and clean the surface

Step 2: Spray the product on the surface so that the surface is well moistened and at the same time the liquid does not flow on the surface. (If necessary, you can spray twice on the surface and spread the material with a microfiber pad.)

This product can be applied to the surface by low pressure pump (spray pump) or brush without the need for dilution. How this primer is applied can vary depending on the final application of the concrete surface. (For more information, see the product instruction manual file)

Maintenance method

Store in the original container and sealed in a dry, low-light environment at a temperature of 10-30. C. If this product comes in contact with the skin, it should be washed off immediately with water. See your doctor if swallowed. This product does not contain dangerous volatile substances as well as non-flammable. Due to the reaction with metals, it should not be stored in aluminum, copper, brass, zinc or galvanized and even iron containers.

Packaging and transportation

This product is offered in 4 liter and 20 liter containers. Due to the absorption of carbon dioxide by this substance, it must be kept in original containers and sealed.