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There are many penetrating concrete sealers on the market that are excellent at repelling water, deicing fluids, road salts, and preventing freeze thaw damage. But what about resisting Oil? Imagine your surprise the first time you clean oil up from your garage floor or driveway and you are left with a nice stain? It is for this reason that GhostShield has introduced Siloxa-Tek 8505 and 8510 oil repelling concrete sealers.
As good as some penetrating concrete sealers work at protecting your garage floor and driveway from the elements, they are less than perfect from protecting your concrete from oil stains. If oil or other petroleum products from a leaky vehicle is allowed to sit for a while, chances are it will leave a light stain on your concrete after you clean it up.
There is a reason for this. Garage floor sealers consist of two basic categories; penetrating sealers and film forming sealers. Unlike film forming sealers that create a visible topical coating, think garage floor epoxy for example, penetrating sealers work by soaking into the concrete and producing a chemical reaction that forms a molecular barrier at the subsurface. Water and chemicals have a difficult time getting pass this barrier, thus protecting the concrete from the elements.
These sealers are very popular due to the fact that they don’t change the look of the concrete, they are relatively low cost, easy to apply, and they will not change the existing slip resistance of the bare concrete.
When water eventually evaporates from the surface, it leaves behind the dirt, salts, and/or other residues that was carried by the water. These residues are generally easy to wash off.
Oil, on the other hand, does not evaporate. If left for very long on sealed concrete, it can penetrate and leave a residue on the surface that has the ability to stain. Up until now, siliconate penetrating sealers have been the best at reducing the chances of oil stains on concrete, but they are not designed as an oil repelling sealer.
A concrete sealer that repels oil
Due to the increasing demands for concrete sealers that can resist oil staining, companies are now working to formulate sealers that do a good job of repelling oils.
Siloxa-Tek 8505 and 8510 by GhostShield is one such product that is leading this field. 8505 is water-based while 8510 is solvent based. They have been formulated particularly for use on garage floors and driveways. Their unique blend of siloxane uses nanotechnology and fluorocarbons to create an oleophobic molecular barrier at the subsurface of concrete that repels oils in order to resist staining.
Fluorocarbons have non-stick and friction reducing properties which when used in a sealer, causes oil film to be repelled or not attracted. It is similar molecular technology that is used for non-stick cookware and friction reducing parts in the automotive industry.
Besides repelling oil, Siloxa-Tek 8505 and 8510 protects your concrete similar to a siliconate sealer. It will protect your garage floor from mold and mildew, freeze/thaw damage, salt and chloride intrusion, reduce vapor transmission and efflorescence, and still remain breathable.
Of the two, our recommendation is the solvent based 8510. The solvent-based carrier agents allow for a higher concentration of active ingredients for better protection and penetration of the concrete.
Benefits of siloxa-tek 8505 and 8510
- Provides excellent oil repellency and stain resistance
- Repels other automotive fluids
- Provides for easier cleanup of oil and grease from concrete
- Prevents winter freeze/thaw damage
- Prevents pitting and spalling from road salts and deicing fluids
- Prevents mold and mildew
- Prevents Alkali-Silica reaction (ASR) which can cause concrete cracking
- Retains same slip resistance as bare untreated concrete
- No change in visual appearance of the concrete
- Reduces vapor transmission
- Less penetration of dirt for easier cleanup
- U.V. resistant
- Low VOC’s
- No harmful by-products
- Easy to apply
- 100-year warranty
Though Siloxa-Tek 8505 and 8510 can be applied as a stand-alone sealer, GhostShield recommends that a densifier be applied to the concrete first.
Since the molecular structure of Siloxa-Tek 8505 and 8510 is so small, the densifier works by filling the larger, porous capillaries deeper within the concrete.
The resulting chemical reaction not only creates a denser interior structure that helps to resist moisture and strengthen concrete, it will also prevent prevent the Siloxa-Tek from penetrating too deep into the concrete. The resulting treatment allows the small nano molecular structure of Siloxa-Tek to fill the remaining voids and create a much denser, oil repellent barrier at the subsurface.
If you were to apply GhostShield 8505 or 8510 without a densifier, the sealer can penetrate too deep into the concrete depending on the surface porosity. This can possibly require multiple saturated coats in order to build up to the surface to be most effective. Applying it in this method would actually be more expensive.
Note: Apply a straight densifier only without any added sealers
Only one application of the densifier is required. The GhostShield Siloxa-Tek 8505 and 8510 requires two applications. You can expect a coverage rate of approximately 250 ft² per gallon for a densifier. The GhostShield 8505 has coverage rate up to 250 ft² while the 8510 has a higher coverage rate up to 300 ft².
Update: If using 8510 and a densifier has been applied, GhostShield now recommends a single flood coat instead of two thinner coats in order to get the best results.
In most cases, the only preparation is a thorough cleaning of the concrete beforehand.
Application of the densifier and the Siloxa-Tek 8505 is easily done with a low pressure pump up garden sprayer. The solvent-based 8510, however, needs to be applied with a 3/8″ nap roller.
You need to wait approximately 7 days after applying the densifier before applying the Siloxa-Tek. This wait period allows for the densifier to chemically react with the concrete to fill the larger voids. Applying the Siloxa-Tek beforehand will only reduce your coverage rates.
It’s OK to walk and drive on the densified concrete within a few hours of application. We just recommend that you keep the garage floor clean and park your car on some old cardboard or mats to prevent oils from the vehicle tires from being deposited on the concrete before application of the Siloxa-Tek 8505 or 8510.
Where to purchase Siloxa-Tek 8505 and 8510
We recommend purchasing from a vendor with concrete sealer experience. Garage Flooring LLC is one such vendor and has become an authorized dealer for GhostShield. They offer the best pricing we have found for GhostShield products which includes free shipping as well as great customer service.
We recommend contacting them if you have any questions regarding quantity and application.
So, about this 100 year warranty
Though GhostShield will not guarantee against stains, they are the only company to provide a 100 year warranty that the product will remain effective during that time. Having never seen such a long warranty for a product, we did a little digging to see what the warranty actually covers. What we found was actually not too surprising.
GhostShield warranties Siloxa-Tek 8505 and 8510 Oil Repellent Sealers against flaking, chipping, fading, and delamination for 100 years under a host of conditions. One of those conditions is a reapplication once every 10 years.
While the 100 year warranty does sound impressive, we find it a bit gimmicky since penetrating sealers will not flake, chip, or delaminate anyways since they penetrate into the concrete. Essentially, only a film forming sealer can actually do this.
This doesn’t take away from the fact that it’s an excellent product, however, we just think that it can be a bit misleading for someone who doesn’t know much about how sealers work.
Is an oil repelling sealer for you?
Siloxa-Tek 8505 and 8510 are outstanding sealers that will provide the best protection of bare untreated concrete for a high duty garage floor or driveway. It will not change the look of the surface and it will retain the same slip resistant properties as bare untreated concrete.
The 8505 was first released a little over 2 years ago and the 8510 was released about 1 year ago. Since then we have been receiving many reviews and comments from people who are extremely happy with their results so far. These reviews have ranged from people that just park their cars in the garage to those that rebuild tractors in their large shop.
If you don’t relish the labor, concrete preparation, and cost for a quality garage floor coating, but worry about oil and other automotive fluids in your garage or driveway, then Siloxa-Tek 8505 or 8510 makes for an excellent choice. Additionally, it is an easy DIY application and has a 100 year warranty to back it up.
However, if you want something that is stain proof, or you are one to let oil and other spills sit for long periods of time before cleaning them up, then you may need to reconsider a film forming coating for your garage floor instead.