Editorial Product Review:Amazon.com Item Description:The StoneTech professional bulletppoof stone sealer is a unique, extra strength stain protector for interior porous natural stone and grout. Providing maximum protection for natural stones, this liquid is formulated with advanced, water based fluoropolymers to protect against the toughest oil and water based stains. The easy-to-use liquid can be used as an effective oil or water barrier, and provides coverage for up to 400 square feet. Other features include a water-based low-solids coating, premium stain protection, preservation of a natural look, and advanced penetrating microbond protection. Emitting a very low odor the product is also designed for interior use, and protects surfaces up to 5 years. The sealer also protects exterior surfaces for up to 3 years. The sealer is compatible with marble, granite, limestone, slate, terrazzo, travertine and sandstone and porous stone surfaces.
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Buyer Reviews
Average Buyer Rating:
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Granite counter top sealer Bulletproof works
After having granite counter tops (honed black) installed in March 2008, we were told that after 6 months we needed to "re-seal" the granite to resisit staining. After much research and trying to find a "green" product, BullerProof was recommended to us by our installer as his recommendation and what they used in their shop. It went on so easily and with no offensive ordor. It now is back to where it was when it was first installed, resisting stains and water penetration. BPSS4-1G StoneTech BulletProof Stone Sealer, 1-Gallon Container
Customer Rating: -
Easy to apply, lasts reasonably long
This sealer was fairly easy to apply (no tiring rubbing needed). Six months after the initial application it seems to have done a good job preventing any stains or disoloration of the granite countertops it was applied to.
Customer Rating: 
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Don't bother
I lugged this stuff halfway around the world to a house I was building on the Mediterranean and smugly announced to the installer that going forward nothing would penetrate the granite countertops, this product came from America!!! So now I have huge grease stains that will not go away and even water penetrates the granite, although the stain disappears after it dryes in the case of water. To any prospective buyer, ask for a sample. Perhaps it will work for you but despite careful adherene to instructions it was a total waste of money in my case.
Customer Rating: 
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Was easy to apply and seems good.
Price was good. Easy to apply. My only concern is that after applying 2 coats as directed and letting dry for 72 hours, standing water still cause the granite to darken. That would indicate to me that the water is penetrating the granite. Once dry, color returns to normal but is this typical? I would think once a sealer is applied, nothing should penetrate the stone. I applied this to the granite counters in my bathrooms. I'm glad I went with quartz counters in the kitchen. That looks as good or better, requires no sealing and is maintenance free.
