Avoid Dexpan Knock-Offs

In the case of expansive grout for the non-explosive breaking of concrete, rock and boulders, some importers source knock-off product from factories in China chasing a quick profit believing they can provide a similar product at a lower price.

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Dexpan Admin
What can cause expansive demolition grouts to blowout?

Expansive grout powders work by mixing with water to cause a chemical reaction that generates heat and expansion.   If the reaction goes too quickly the temperature can be above the boiling point of water before all the water has chemically combined with the powder. This can result in a steam driven explosion which blows out the expansive grout from the holes with sudden force.

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Dexpan Admin
Basement Boulders Gone After 25 Years

"A little bit of history about the large rock that you will see in the pictures of the basement of our cottage. About 25 years ago when we were much younger my now brother in-law and I drilled about 20 1/2" holes in the rock and tried to break it up with a wedge and small sledge hammer without success. My son and I tried to break it up again last summer with a wedge and small sledge hammer without success again.

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Dexpan Admin