Q&A for How to Pressure Wash Concrete

Absolutely. That's one main reason for sealing and it works quite well, but does have to be re-applied every 3-5 years.

The chemical compound tri-sodium phosphate (TSP) removes dense areas of oil or grease from concrete surfaces.

A Green 15° or a long Black 'Turbo Tip'. That has the same high pressure nozzle that the Red 0° High-Pressure has, but the Turbo one rotates around and creates about a 3 inch circle of complete high pressure removing power.

Hairline cracks in concrete walls can become deeper and wider. Also, the paint and chunks of concrete are easily chipped off these small edges of these type of cracks. As a result of the damage caused, it's usually necessary to apply a filler or bonding compound and then repaint the area. Asphalt is also easily damaged by the operator using too high of a pressure tip or trying to remove weeds or plant growth with the sprayer.