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October 21 - October 25, 2013

How do I prepare an oil-stained, bare concrete floor for coating?

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From Michael Quaranta of OPERATIONS 40 on October 29, 2013:
How old are the oil stains? Do not use any solvent-based product or soda process hoping to clean the concrete. There will be serious residue remaining with lots of the old oil particles that you hoped to be removed on the surface. There is no guarantee about the final finish, but the absolute best method is to completely bead blast the floor to remove the "fines." Now let me ask: what coating were you considering ? For my money, there is only one coating for that concrete floor,  a water-based epoxy with more than 2 hours of pot life. It goes on with a roller and you can't cut it with a razor after 24 hours!

From Kenneth Tibbetts of K C Tibbetts Company on October 21, 2013:
Power-wash the worst spots with methylene chloride, following proper procedures for the method of oil-type stains. Then "blast" the entire surface with sodium bicarbonate. Flush or "blast" with clear water. Voila!

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Tagged categories: Concrete floor coatings; Maintenance + Renovation; Surface preparation

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