Model # 3500

Internet #205848907

Ghostshield 1 gal. Invisible Penetrating Concrete Sealer Plus Densifier and Hardener


1 gal. Invisible Penetrating Concrete Sealer Plus Densifier and Hardener

$4488 /gallon
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Frequently Bought Together

Product Overview

Sila-Tek 3500 is the most advanced concrete densifier available. This clear penetrating sealer not only densifies and hardens concrete making it up to 50% stronger, but it is the go to choice to harden and prime basements and driveways. It is also an excellent choice for polishing concrete.

California residents: see   Proposition 65 information

  • Increases abrasion resistance and strengthens concrete up to 0.50, UV resistant, reduction of dirt pick-up
  • Reduces risk of efflorescence, protection against micro-organism growth, effective penetration depth
  • Seals pores and capillaries while remaining breathable, no change in appearance of the substrate; the treated surface does not become glossy, tack free, durable finish
  • No formation of harmful by-products, no VOC’s, supplied concentrated, makes 5 gal.
  • 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,UV/Fade Resistant
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 product be used around the in ground pool

Asked by: gg
The Sila-Tek 3500 can be used around a poured concrete pool deck to strengthen and harden the concrete; however, it will not provide any hydrophobic or salt repellent qualities. If you are looking for a natural finish on a pool deck you can use the Siloxa-Tek 8500 product or use the Sila-Tek 3500 product first as a primer followed by the Siloxa-Tek 8500 as a top coat sealer 7 days later.
Answered by: KreteTek
Date published: 2017-05-31

Is this non-toxic and food safe?

I plan to use it on a concrete countertop in the kitchen
Asked by: ConcreteCountertop
As a water based penetrating sealer our Sila-Tek 3500 is food safe. If using on counters it is important to make sure the surface is truly concrete, as our Sila-Tek 3500 may not perform as desired if applied to concrete alternatives. If you are not sure if your counter is a suitable application you may call in at (855) 573-8383 and we would be able to help you.
Answered by: KreteTek
Date published: 2016-04-09

how do you apply this product

also in the specs. it shows it covers 1000 sq. ft. is this correct? and what do you use for clean up?
Asked by: yardman
Our Sila-Tek 3500 can be applied using a brush, standard paint roller, or a pump sprayer with a fan tip. On average a gallon of material cover about 1000 square feet in a single coat, however as it is recommended two coats, on average a single gallon will fully treat about 500 square feet. As a water based sealer you can clean your equipment using soap and water.
Answered by: KreteTek
Date published: 2016-10-31

Would you recommend this cor Outdoor concrete countertops that do not need to be food safe?

Asked by: Jon
We would not recommend using this product on outdoor concrete countertop, we would recommend using the Countertop Sealer 770 if you are looking for a natural finish since it is able to repels water and stains.
Answered by: KreteTek
Date published: 2017-06-13
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Customer Reviews

1 gal. Invisible Penetrating Concrete Sealer Plus Densifier and Hardener is rated 2.0 out of 5 by 2.
Rated 3 out of 5 by from Ok but.. i bought it hoping to seal my cement driveway from the green mold and mildew. This product does not repel water when it rains. Its purpose is to harden the cement. Isn't cement hard enough the way it is? I took a chance and i was wrong because i didn't want to spend 99 dollars for the one that does. 99 is too high for me as i will look else where for lesser price just to keep the moisture out. But it is my fault as it was not intended for this purpose. There was no review avail other then the specs of the manf. web site so i didn't have much choice so i'm writing one for this purpose
Date published: 2016-07-19
Rated 1 out of 5 by from This product didn't work. I applied as directed and concrete is not sealed . Waste of money This product didn't work. I applied as directed and concrete is not sealed . Waste of money
Date published: 2016-11-01
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