ISO-TEK 8501

Concrete SEALER

Technology that goes over your head

A revolutionary aqueous, solvent-less, silane-based water repellent that is the latest break-through in clear penetrating sealers.

ISO-TEK® 8501


The Iso-Tek 8501 is a special order product. Please contact or 855-573-8383 for pricing.

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Technology that goes over your head

A revolutionary aqueous, solvent-less, silane-based water repellent that is the latest break-through in clear penetrating sealers.

What it is

Water-based concrete sealer

What it's for

Specially formulated for vertical surfaces, concrete and reinforced concrete, brick, masonry

What it does

Seals, resists chlorides and impregnates high density concrete

What it's made of

Aqueous silane chemistry


Designed for high density concrete to resist oxidization and inhibit rust

What's the finish/color

Clear, natural

How do you apply it?

Airless sprayer, Purdy wall weaver brush

What's so special about it

This thixotropic sealer changes the surface tension to create a surface environment that is hydrophobic and able to repel water and water-soluble deleterious materials. Also aides in a dramatic reduction of chloride-ion ingress, sulfates, acidic gases, salts and water absorption.

What else is like it?

Iso-Tek 8100: 100% actives silane sealer


Photos and videos of Ghostshield concrete sealers in action


Technical specs, application instructions, testing data

ISO-TEK 8501 rises above

Iso-Tek 8501 meets or exceeds the following tests:

ASTM E-96: Water Vapor Transmission

ASTM E-514: Water Penetration

AASHTO T-259: Chloride Ion Penetration

NCHRP 244 II/IV: WVT, Chloride Intrusion

OHD L-34: Depth of Penetration


Iso‐Tek® 8501 is a unique impregnating agent. It has an outstanding ability to impregnate high‐density concrete and reinforced concrete. Unlike conventional liquid products, Iso‐Tek® 8501 can be applied in just one coat of the desired thickness (at the very most, two coats). The silane active ingredient penetrates the substrate within 30 minutes to several hours, the exact time depending on the porosity and thus quality of the concrete. As the active ingredient is the same as in conventional liquid impregnating agents, impregnation with Iso-Tek® 8501 does not clog the pores or capillaries, nor does it affect its ability to "breathe". Iso-­‐Tek® 8501 is designed to penetrate deeply into concrete so as to afford optimum protection against absorption of water and pollutants as well as freeze / thaw cycles. This effect should not be confused with the "beading" effect imparted by impregnating agents that is often referred to as water repellency. Beading is only a surface effect, and it plays a secondary role in protecting the substrate. Concrete treated with Iso-Tek® 8501 has intially only a moderate beading effect, but this increases after the surface has been wetted.


Make sure to avoid contact with skin, eyes and clothing. No respirator is needed when applying this product. Wash your hands after use and do not take internally. Please refer to the product Saftey Data Sheet (SDS) before using.

The preparation process should be followed to ensure adequate penetration and optimum performance of the sealer. The concrete substrate must be structurally sound, thoroughly dry and clean. Make sure to remove all paints, sealers and/or adhesives before application. The substrate must be clean of oil, grease, dirt, wax, curing compounds, efflorescence and other contaminants that might interfere with the penetration of the sealer. If you are using an acid to clean the concrete, neutralize the surface completely and rinse it with water prior to application. New concrete must be cured at least 28 days before applying Iso‐Tek® 8501. Prior to sealing check your local forecast to make sure that there are no impending threats of perception within 1 day of application. It is recommended the sealer be tested in an inconspicuous area to ensure the desired coverage and appearance is achieved.


Iso‐Tek® 8501 is best applied undiluted by a low pressure airless sprayer. A lambskin roller or brush can be used in smaller areas. The exact amount depends on the absorbency of the substrate. If the substrate is of high quality and hence not very absorbent, do not apply more than roughly 185 sq. ft. per gallon in one operation, as it may take several hours to penetrate completely. At higher application rates, the impregnating film might liquefy because of the concretes alkalinity and it might start to run off. Only impregnate concrete that has a uniformly dry surface with no damp patches. Should it suddenly start to rain, stop treatment and cover the impregnated areas.


  • Iso‐Tek® 8501 should not come into direct contact with bitumen. The resistance of insulant against Iso-Tek® 8501 has to be determined dependent on temperature.
  • Do not apply if rain is due on day of application
  • Do not apply in direct sunlight resulting in temperatures outside of the application parameters
  • Do not apply in high wind conditions (applies if utilizing airless sprayer and winds exceeding 35 mph)
  • Do not apply if temperature is expected to fall below 41 degrees F

Ghostshield in action

Recent project videos showing how to seal your concrete with Ghostshield


Our latest project in Florida was for the beautiful new Caoba Apartments, part of the new Miami Worldcenter. Ghostshield was the perfect sealer for their high-traffic parking garage.

432 Park Avenue New York

432 Park Avenue - the tallest residential building in the Western Hemisphere - sealed with our flagship commercial product, Iso-Tek 8501; a thixotropic sealer.

Ghostshield Iso-Tek 8501 Concrete Sealer

Arkansas State University

We take our show on the road again to Arkansas State University. The Fowler Auditorium needed to be protected from the elements, and we had just the product for them to protect and seal like no other - Iso-Tek 8501!