Sealing Patio Paving Stones

October 20, 2006

Q: This summer we are having a large area in our back yard done with patio stones, we are looking at sealing the patio ourselves, in order to save some money. What product and process do you recommend we use?


A: Before sealing, you must acid wash (Muriatic acid) the surface to etch the cement to enhance penetration of the sealer. (Add 1/3 acid to 2/3 water, not the other way around and you should always wear safety glasses & gloves.) Use a solvent based concrete sealer for the initial application; 2 – 3 years down the road acrylic coating may be used.

Note: To apply sealers, it’s best to use a low-pressure garden sprayer apparatus, or puddle on the surface and spread with a 10mm roller.

Caution: Do not do the project in bright, hot sun.