How much do I need?

There are "Quanty Guidelines" for each product on the page where you order it, directly below where you enter the quantity of product to order. But, here are the things to consider in coming up with an estimate:

For cleaners or other problem solving type products:

The quantity needed varies with the degree of treatment needed, the number of applications required, how much of the surface needs to be treated.  Therefore, it is just your best guess.

For sealing: the surfacing and the grout joints at one time. For sealing only the grout joints and not the surfacing, see below.

• The more absorbent the surfacing, the more liquid it will absorb. And, as a general rule the more absorbent a surfacing, the weaker it is and the more it needs to be made stronger with the sealer solids penetrated down into the surface.


• The solids level of the sealer is another variable to be considered. The higher the solids, the less sealer gallons needed - but that is not the only consideration. The sealer needs to be chosen for the final goals, not for lesser quantity.


• It is just as impossible for us to guess about the quantity with any accuracy as it is for you.


• A reasonable starting point is to use 400 square feet per gallon for medium absorption, then increase that number by twice if the surface is low absorption (800 square feet per gallon) or decrease by 50% for medium to high absorption (200 square feet per gallon) or decrease by an additional 50% for highly absorbent surfaces (100 square feet per gallon)


• Then order less than you estimate you need so that you do not over order.


• The job conditions are the only thing that really determine the final quantity. Therefore, the safe way to handle this is make the first order at 75% of what you estimate will be the final total. The job consumption will tell you how much to order to finish the project.

For sealing ONLY the grout joints and not the surfacing::

Wide joints (over 1/8" wide) are a "sanded grout" and usually medium absorption. Any additives (polimers, acrylics, epoxies, etc.) added to the grout by the grout manufacturer or the installer will make it less absorbent.

Narrow joints (under 1/8" wide) are usually an "unsanded grout" and are usually low to very low absorption.

1. Find the "Quantity Guideline" of the sealer as above. It will tell you the approximate square footage per gallon.
2. Multiply the width of the grout joints by the lineal footage of all grout joints. This gives you the square footage and tells you how much sealer is needed per the quantity guideline.
   For example:
   • 1/2" wide grout joints and all grout joints add up to 100 feet.
   • 100 feet is 1200 inches of grout joint
   • 1200 inches times .5 inches wide is 600 square inches of grout joints
   • One square foot is 144 square inches. Therefore, 600 square inches divided by 144 = 4.16 square feet of grout joint to be sealed.

For stripping:

Directly below where you enter the quantity on the ordering page are the "Quantity Guidelines".  How much you actually need will depend on the thickness of the sealer buildup.  Thick and hard coatings require more and thicker applications of stripper because there is more and harder sealer to be dissolved.