The correct response to this question is “it depends.”
To elaborate, a little explanation about sealant is needed. Sealer application depends on the type of sealer used in the initial construction and the type of aggregate in the concrete. 2-3 years is the average time frame in which a concrete surface should annually be resealed. A sealer’s covering power greatly varies depending on its material differences, such as how a more porous aggregate can double the quantity of sealer you could need for the 1st coat. That said, once the 1st layer is laid out and the surface is properly sealed, additional applications will use considerable less sealer.
The tools for this job will vary depending on the surface texture and the consistency of the sealer, calling for anything from a short-nap roller to a mop-style applicator. The key is choosing an applicator that allows you to spread a thick coat of sealer. You’re looking to drench the porous aggregate with the sealer. Being generous with the sealer will slow down the absorption rate, and increase the amount of sealer that you will have to buy.
You’ll want to reseal your project every couple of years. This will help ensure its longevity, and continue to protect it against the elements.
