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Expansion, contraction, temperature changes from hot to freezing often takes its toll on steel reinforcing bar, especially when it is near the surface of the concrete.This problem frequently happens on window sills, pillars etc. Expansion / contraction causes small hairline cracks, moisture penetrates the small crack and when frost comes, that moisture freezes and expands causing the crack to get bigger. This eventually can lead to a chunk of concrete breaking off exposing a rusted steel reinforcing bar beneath. </p>
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The Solution is easier than you might imagine.</p>
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Remove all loose pieces of concrete. Use a hammer and appropriate chisel. (Always use eye protection in case of flying material)</p>
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Apply Owatrol Oil on top of the rusted exposed steel reinforcing bar which will protrude from deep within the concrete. Because of its enormous penetrating properties, the Owatrol will wrap itself around the bar and assuming enough is aplied, will follow the bar into the concrete at both ends. The Owatrol, being three times wetter than water, will penetrate and travel along the bar inside the concrete thereby driving out all hidden moisture and oxygen (rust food) and seal them out. Remove any excess Owatrol with a cloth and allow to dry over 24 hours minimum. If time is a problem, don't worry about not getting to the next stage as the rust is now stopped.</p>
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Next step, make up a sand and cement mix and apply over the bar to replace the original broken concrete profile. Smooth off to match the surrounding concrete and allow to dry / cure.<br />
The problem will now be solved and concrete can be painted as required.<br />
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To paint, see Shop by Problem - Peeling Paint.</p>
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Rust or corrosion on steel reinforcing bar exposed at the surface of concrete can be solved quickly and at minimal cost with Owatrol Oil.
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