Model # 8500-OR

Internet #205848944

Ghostshield 1 gal. Invisible Penetrating Concrete and Masonry Water Repellent Sealer Plus Oil Repellent


1 gal. Invisible Penetrating Concrete and Masonry Water Repellent Sealer Plus Oil Repellent

$7810 /gallon
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Frequently Bought Together

Product Overview

Siloxa-Tek 8505 is the most innovative product ever formulated. A proprietary blend of silane/siloxanes and a proprietary stain repellent additive, this clear penetrating sealer not only prevents staining, oil penetration, deicing salt and freeze-thaw damage, but its hydrophobic nature resists moisture intrusion and vapor transmission. This is the go to choice to seal any concrete, brick, or masonry based substrate especially driveways, garages and patios.

California residents: see   Proposition 65 information

  • Provides excellent oil repellency resisting staining, makes oil and grease easier to remove from treated surfaces decreasing maintenance requirements, physically and chemically bonds to substrates increasing the lifespan and making cleaning easier; reducing maintenance costs
  • Prevention from freeze-thaw attack and ASR by preventing the ingress of water, prevents further damage to reinforced concrete by limiting the substrate water content, chloride and other aggressive salts, provides increased protection as a hydrophobic barrier to prevent future penetration of water and soluble aggressive agents through a crack
  • Provides protection from spilling and pitting as a result of aggressive salts and chlorides, no change in appearance of the substrate; the treated surface does not become glossy, alkali resistant, freeze-thaw or de-icing salt resistant, UV resistant, reduces vapor transmission
  • Water beading (water repellent effect), reduction of dirt pick-up, reduces risk of efflorescence, protection against micro-organism growth, effective penetration depth, seals pores and capillaries while remaining breathable, tack free, durable finish
  • No formation of harmful by-products, low VOC’s, supplied ready to use, easy to apply
  • Online Price includes Paint Care fee in the following states: CA, CO, CT, ME, MN, OR, RI, VT

Info & Guides

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Container Size
1 GA-Gallon
Coverage Area (sq. ft.)
Product Size (oz.)


Application Method
Brush,Paint Sprayer,Roller
Coating Product Category
Clear, Natural
Dry to the touch (hours)
Maximum hydrostatic pressure (lb.)
Number of coats recommended
Paint/Stain Base Material
Paint/Stain Key Features
Dries Clear,Mildew Resistant,Moisture Resistant,Sealer,Stain Resistant,UV/Fade Resistant,Washable
Paint/Stain/Waterproofer Product Type
Masonry, Stucco & Brick
Product Type
Substrate/Surface Use Type
Time before recoating (hours)

Warranty / Certifications

Manufacturer Warranty
Manufactures Defects Warranty

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Customer Questions & Answers

Can this be used on flagstone

Asked by: Ryan
Our Siloxa-Tek 8505 can be used on any porous masonry substrate. If you have any questions about your application, feel free to call in to us at (855) 573-8383.
Answered by: KreteTek
Date published: 2017-06-26

Can Home depot order me the 8505 1 gl that is mixed with water to make 5gallons?

I need to ship to the Caribbean and would buy 4 of those rather than 20 of these.
Asked by: BetteGH
Lowes sells the concentrated
Answered by: shon
Date published: 2017-07-24

How long do I have to wait to apply to newly poured concrete?

Asked by: Cas
Concrete should be cured for at least 28 days before applying our Siloxa-Tek 8505 Oil Repel.
Answered by: KreteTek
Date published: 2017-05-14

will this product seal and waterproof grout joints in a shower

will this product seal and waterproof grout joints in a shower
Asked by: elmer
Yes, you can use this to seal grout.
Answered by: CommunityAnswer
Date published: 2017-06-23
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Customer Reviews

1 gal. Invisible Penetrating Concrete and Masonry Water Repellent Sealer Plus Oil Repellent is rated 4.2 out of 5 by 9.
Rated 5 out of 5 by from My husband ordered 5 gallons to seal our 500 square foot garage and we choose this product over t... My husband ordered 5 gallons to seal our 500 square foot garage and we choose this product over the siloxatek 8500 since we are going to be parking our cars in the garage and were worried about oil leaks. I can't comment about the longevity but it's been about six months and winter just ended and the garage still looks great.
Date published: 2017-03-26
Rated 5 out of 5 by from I just parked a car with a rather large oil... I just parked a car with a rather large oil leak on the new concrete. With a spray of Zep citrus degreaser and a hose off the oil was gone. How it will be after 10 or 20 years we will see. In the mean time it works very well.
Date published: 2017-07-28
Rated 5 out of 5 by from Seems to work very well Used this sealer for my driveway and garage apron. Coverage was as expected, I applied 2 coats. Went on easy, repels water and stains as advertised. Works very well.
Date published: 2017-03-19
Rated 5 out of 5 by from Sprayer application did a two car garage in 20 mins.... Sprayer application did a two car garage in 20 mins. No more tracking in new concrete dust. Flat sheen.
Date published: 2017-05-23
Rated 5 out of 5 by from Just what I was looking for. This stuff has been great! It has excellent coverage, repels oil and water, and dries completely transparent. I originally put down the 9500 ghost shield without realizing that it was not designed to repel oil. Cutomer service has been outstanding! They have been very helpful getting me this product and advising me on how to get the old product off, so that it could be applied. I applied this on my 1 year old driveway and garage. I couldn't be happier with the 8505 or the level of service and support I've received from Ghost Shield! I would purchase again.
Date published: 2015-09-04
Rated 5 out of 5 by from Works exactly like I needed it to I applied this just recently to a concrete sidewalk that was poured about 4 months ago. Application was a breeze, though it didn't go as far as I thought it would. I may have applied it a little heavy. A day later I was able to see the water bead off the concrete. This will be great in the winter! Will be buying 3 more bottles to do our front porch and another coat on the sidewalk. I specifically bought this one because I wanted the oil repellent on the concrete apron at the end of our driveway. If you don't need the oil repellant, then just go with the 8500.
Date published: 2015-08-12
Rated 1 out of 5 by from Not guaranteed for 100 years Does not repel water. It did change the color of the concrete. I had to put an additional 2 coats of 8500 over the 2 coats of 8505. Now my driveway looks goofy because of the color change. When you read the fine print you have to reapply every 10 years. So not guaranteed for 100 years.
Date published: 2016-09-09
Rated 3 out of 5 by from Oil Repllent Limitations This is after many emails back and forth with Ghostshield... Their 8505 contains an oil repellant, whereas 8500 does not, which is the only difference between them. If it seems like purchasing the 8505 is the better deal, think again and use caution. (1) The 8505 is oil "resistant" meaning it will still stain if you don't clean the area right away which is rather inconvenient to do in a garage, especially if you lay garage tiles over top the finished product. (2) You cannot apply ANY other spray, brush or roll on coatings over top the 8505 because they will not properly adhere to the surface due to the additives that make it oil repellent. Might be fine for a new concrete slab, or an older one that still looks good and you plan to acid etch and/or grind it before hand. But if you're not sure you will like the look of a clear finish beforehand, you might want to think about using the 8500 instead for its other excellent properties, then go over it with another non-clear coating for the look you want.
Date published: 2015-07-26
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