(3 customer reviews)


16 oz Sample $19.88 (samples are not returnable)

1 Gallon Concentrate MAKES 3 GALLONS: $69.88

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Lithi-Tek 4500 is an industrial-grade, water-based, lithium densifier for use as a stand-alone product or as a primer to strengthen and harden concrete making it up to 50% stronger. It is the go-to choice to harden and prime basements and driveways and it is also an excellent choice for polishing concrete.


1 Gallon Ultra Concentrate: Up to 1000 sq. ft

1 Gallon Concentrate mixes with 3 gallons of water to make 4 gallons


  • Increases abrasion resistance
  • Strengthens concrete up to 50%
  • Excellent penetration
  • Reduces the substrate porosity
  • No appearance change to the concrete, dries clear
  • Reduces ASR/Alkali attacks
  • Easy to apply
  • No odor
  • Will never yellow, fade, peel, crack or bubble


Warehouses and industrial facilities, Use as a primer prior to application of Siloxa-Tek 8500 Siloxa-Tek 8505, Siloxa-Tek 8510



Not for use on: bricks, concrete blocks/cinderblocks, polished concrete/extremely smooth concrete surfaces


  • Feature: Densifier & hardener
  • Chemistry: Lithium silicate
  • Color: Clear
  • Finish: Invisible
  • Category: Penetrating
  • Carrier: Water
  • Packaging: 1 Gallon Concentrate
  • Reconstitution Ratio: 1 part sealer : 3 parts water (distilled water is recommended)
  • Interior/Exterior: Interior/Exterior
  • Application Method: Sprayer, Roller
  • Application Temperature: 40 F – 95 F
  • Number of Coats: 1
  • Drying Time (dry to touch): 6 Hours
  • Drying time (full cure): 24 Hours
  • Time before/after rain: 48 Hours
  • New Concrete: Yes, at least 28 days after being poured
  • Storage/Shelf Life: 1 Year
  • Clean up: Soap/water
  • Paintable: Yes
  • VOC Content: 0 g/L

For complete Lithi-Tek 4500 application, SDS Sheets, FAQ’s, testing and technical data visit

Have an application question, help figuring out the right product for your application or need help calculating your square footage? Give us a call 888-230-5569 or email us:

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5 out of 5 stars

3 reviews

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What others are saying

  1. C. Todd

    C. Todd

    Lithium based densifiers are the way to go especially if you are going to be polishing the concrete and this product is no different.

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  2. Keith R.

    Keith R.

    A customer service rep recommended I use the 4500 product first as a primer of sorts to densify my driveway that has existing spalling damage and then use the Siloxa-Tek 8500 on top to prevent spalling and salt damage. The combination of both products really seemed to make a visible difference since the winter just passed and I have no new spalling!

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  3. Tony Scondras

    Tony Scondras

    Great product, dries clear and goes on easy. Shipped fast

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