Model # OK620

Internet #204643807

Rust-Oleum OKON 5 gal. S-20 Penetrating Repellent Sealer

Rust-Oleum OKON

5 gal. S-20 Penetrating Repellent Sealer

$12647 /each
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Frequently Bought Together

Product Overview

Lock out water and its damaging effects on dense concrete and masonry with Rust-Oleum OKON S-20 Water-Repellent Sealer. The silane/siloxane formula penetrates deeply to create a tough hydrophobic barrier against water invasions. Ready to use and paintable.

California residents: see   Proposition 65 information

  • For use on vertical, flat, dense surfaces-brick/stucco walls, etc.
  • Prevents water, efflorescence and freeze-thaw damage; breathable
  • Clear, non-yellowing, non-glossy, water-based, low VOCs and very low odor
  • Apply with a low-pressure airless sprayer

Info & Guides

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Container Size
5 GA-Gallon
Coverage Area (sq. ft.)


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

Warranty / Certifications

Manufacturer Warranty
Satisfaction guaranteed for full refund of purchase price

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Customer Questions & Answers

Can you use this one concrete pavers?

Can you use this one concrete pavers?
Asked by: clark
Great question, Clark! Rust-Oleum OKON S-20 Penetrating Repellent Sealer is suitable for use on horizontal or vertical dense concrete and masonry surfaces.
Answered by: Rust-OleumSupport
Date published: 2017-05-26

Is it slippery when wet?

Is it slippery when wet?
Asked by: JJ77
When properly applied, Rust-Oleum Okon S-20 Penetrating Repellent Sealer will penetrate and react with salts and minerals within the substrate to create a hydrophobic barrier against water absorption. With proper application, this product will dry clear with no sheen or build-up.
Answered by: Rust-OleumSupport
Date published: 2017-05-23

How long will it last.

Asked by: Bob
Great question, Bob. Properly prepared surfaces and applied product qualifies for a 5-year water repellency warranty.
Answered by: Rust-OleumSupport
Date published: 2017-05-23
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Customer Reviews

5 gal. S-20 Penetrating Repellent Sealer is rated 4.8 out of 5 by 4.
Rated 4 out of 5 by from Good stuff .... Goes on with a milk-like consistency. You can definitely see the water-proofing abilities at work during a good rain. Dries to a natural concrete color, whitens the concrete slightly. Most importantly, does not DARKEN your concrete like a lot of other products on the market. Good stuff.
Date published: 2015-06-27
Rated 5 out of 5 by from Great Product from inital application I rented a concrete buffer with diamond wheel to strip old flaking epoxy pain off a 1956 garage floor. I cleaned it well with a concrete floor cleaner degreaser and let air dry completely so the S-20 could soak in fully. I applied 2 good coats on an approximate 15 x 25 garage floor and steps with a pump sprayer which wormed very well. It is harder to apply to vertical surface since it is more of a water consistancy. Front of steps took more applictions and I applied it as it would absorb/dry quicker than flat areas. Allowed to soak in well and pushed excess around with a smooth surface nice quality paint roller/handle. It soaked up well. Water repels off the surface very nicely since the S-20 absorbed deep. A few spots do abosorb slight amounts of water and I may clean and try to reapply in 6 months to see if it will take anymore S-20. I believe I have ~2gallons left from the area I had done. I may use some outside on our newer conrete to help protect it as well. Best of luck! It would be good for HD to carry this in the sotre even in gallon cans. it was hard to estimate how much I would use and 5 gallons seemed like a lot but I can use some in other areas.
Date published: 2014-10-14
Rated 5 out of 5 by from good product This product was very easy to apply using a hand sprayer. Okon S-20 covers a hugh area with just one application. The results are very good! Our brick patio never looked so good and the water just sheets off.
Date published: 2016-05-03
Rated 5 out of 5 by from Great product Expensive but worth it. No yellow easy to put on,hard to determine quanity needed.Home Depot very helpful.
Date published: 2015-10-25
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