Concrete protection and preservation using penetrating sealers

For silanes to work, they must penetrate the concrete. If the solution puddles and doesn’t seem to be soaking in, it should be broomed, blown, or squeegeed into areas where it will be absorbed.

For silanes to work, they must penetrate the concrete. If the solution puddles and doesn’t seem to be soaking in, it should be broomed, blown, or squeegeed into areas where it will be absorbed. Sweeping, power-washing, blowing off the debris, and shotblasting are methods specified by various state DOTs. Shotblasting is by far the best because it removes all trapped dirt, grime, and rubber and opens up the pores of the concrete.

Some DOT specifications require that blue, green, or red dye be added to silane formulations so inspectors can visually confirm application. The dye dissipates in five to seven days. Surface preparation can be as simple as sweeping, but concrete should be as clean as possible before application. Therefore, specifications should also address surface preparation.

Silanes perform as advertised when the proper amount is specified and applied. Dozens of departments of transportation and universities globally and in the U.S. have affirmed silane performance. The question is always, “How can something we can’t see work?”

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