Sigma Anti Carb - Water-based Anti-carbonation Paint | Tough Matte Elastomeric Membrane, Free From Odor And Toxic Fumes

SIGMA ANTI CARB

(An Anti-Carbonation Paint)

Description :  Sigma Anticarb has been formulated to confer long term protective and decorative properties to concrete and masonry surfaces.The micro-porous structure of the coating acts as a barrier to the ingress of Chlorides and Carbon Dioxide and other acid gases, but allows the passage of water vapour from the substrate.

It is free from strong odor and toxic fumes and cures to form a tough, matte, elastomeric membrane, which tolerates substrate movement and does not embrittle with age, or prolonged exposure to ultra-violet light.earance of the structure .

Sigma Anticarb is based on special material to

meet the requirement to obtain the following required properties to make it

suitable for use on concrete articles air-

drying

excellent adhesion.

Thoughness with good elasticity. Good weatherresistance.

Resiliency .

 Characteristics :

 Component                      : Single, water based , easy to apply & Easy to clean.

 Drying.                              : 30 to 60 minutes.   

 Hardness.                          : Overnight.

 Recoat ability.                  : 4 hrs. depending upon the humidity and temperature.

 Coverage.                         : 5 6 sq. mtrs.depending upon the humidity and temp.

 Recommended D.F.T.     : 25 30 microns.

 Colour                               : white, grey

 Packing.                            : 20 Kgs

 TECHNICAL DATA  

 Carbonation Of Concrete :

A major factor in concrete decay is carbonation, caused by Carbon Dioxide (CO2) in the atmosphere reducing the alkalinity of concrete. This in turn results in reinforcing steel becoming susceptible to attack by water and oxygen, causing corrosion of the steel and eventually spalling of the concrete. Sulphates from vehicle exhausts and chlorides from de-icing salts also contribute to concrete degradation.

Carbon Dioxide in the atmosphere reduces the alkalinity of concrete. The alkalinity of concrete is typically between pH12 and pH13, at these levels the highly alkaline nature of the concrete results in the formation of a passivation layer on the reinforcing bars, preventing corrosion. A drop in the level of alkalinity to a pH of below 9.5 eliminates the passivation and protection, making the concrete susceptible to attack by water and oxygen, leading to corrosion of reinforcing steel and eventually spalling of the concrete.

Causes of decay in concrete:

  Weathering leading to erosion,

 Water absorption leading to rusting of reinforcement ,

 Insufficient concrete depth corrosion of reinforcements,

 De-icing salts chloride corrosion