This is an indoor/ outdoor product. This is the product to use when you have a stone such as polished marble, or polished granite, that are not porous enough to accept film forming gloss, or semi-gloss sealers. Invisi-Guard will maintain the un-sealed look, while helping protect the surface from staining. 
You could also use this on porous stones, clay, concrete, tumbled marble, brick, and slate where you want a good level of stain protection, but again want to maintain the un-sealed look.

For best results this is a stand alone product.

Remember though on porous stones, you will always get better results from a semi-gloss (646 or 646 Plus), or high gloss (686 Plus) film forming sealers.
Having said that; these will perform better than ANY impregnating, or penetrating sealer.
But if you are planning on using a film forming sealer; do not use impregnating, or penetrating sealers first.

DIRECTIONS: First be sure surface is clean, dry and free of other coatings. Apply with sponge, roller, brush or sprayer. Do not leave puddling. 
Buff surface dry, while still damp, with a rag, or paper towel. Apply a second coat in the same manner, as the first coat, after 30 minutes at normal temperatures (70-85 degrees). Always test Invisi-Guard on an un-installed sample to determine suitability.

Penetrating Impregnators are reactive products, and you should TEST before using.
If you have not used Invisi-Guard before; test on an un-installed sample. Invisi-Guard may slightly darken, or lighten the surface.

When you are looking to have a semi-gloss look; do not use Invisi-Guard. Start with, and finish with our 646 Plus. 
Looking for a very high gloss finish, then start, and finish with 686 Plus.

LIMITS: Do not use Invisi-Guard as a pre-grout sealer, if you intend to use a semi-gloss, or high gloss sealer after grouting. 
Invisi-Guard provides a serious barrier, that blocks gloss sealers from proper adhesion. Only use this product when you want to maintain the "Un-sealed Look". 
Do not use below 55 degrees, or above 90 degrees F.

COVERAGE: Invis-Guard will cover between 150 to 1000 sq. feet per gallon. Each surface differs in its porosity, which affects the amount 
of sealer used. There is a big difference in porosity, between a concrete paver, and polished marble.
This is the amount of sealer we estimate it will take to completely seal a given area, when applied, as per the above directions.

CURING TIME: Invisi-Guard is the first water-based impregnator to cure as fast. or faster than oil-based products. It shows great rejection shortly after the surface is dry, although total curing time is 24 to 48 hours.

SEALANT LIFE: The protection should last up to 10 years, although traffic, weather, type of substrate, or extreme cleaning may shorten protection. Periodically test with sealer for absorption. If any is detected, re-coat.
As with all impregnating products, these are "maintenance products".

NOTICE: Our only obligation shall be to refund purchase price, or replace any of our product proved to be defective. Beyond the purchase price of materials supplied by us, we assume no liability for damages of any kind, and the user accepts the product "as is", and without warranties, either expressed, or implied. The suitability of the product for an intended use, shall be solely up to the user.