Why do we need Coatings?

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1- Applying a coating is an action taken to prevent more expensive problems in the future and also to extend the life of concrete repairs

2- Also to extend the life of concrete repairs

 

To Prevent Attack on
a) Concrete or newly installed repair mortars

b) Steel reinforcement

 

To Creates impermeable barrier
Steel is protected, structure is protected

 

 

To Prevent Damage from

a) Direct damage to concrete from

- Chemicals
- Sulphates
- Abrasion

b) Damage to steel (in presence of water and oxygen) from

- Carbon dioxide
- Chloride ions

 

 

Acrylic

Polyurethane

Epoxy

Silane / Siloxane

Chemical

Average

Good

Very good

Poor

Sulphate

Good

Very good

Very good

Good

Carbon Dioxide

Good

Very good

Very good

Good

Chloride ion

Good

Very good

Very good

Good

Abrasion

Average

Good

Very good

Poor

UV Resistance

Very good

Very good

Poor

Good

Flexibility

Good

Good

Poor

Poor

Breathability

Good

Very Poor

Poor

Very good

Adhesion

Good

Good

Very good

Good

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