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How to Stop Concrete Sweating

Concrete sweating usually occurs when warm air comes into contact with a cooler concrete slab and it causes the concrete floor to sweat. Continue reading to learn how to stop concrete sweating.

After a humid night, water vapor in the air will come into contact with the cooler concrete floor and will condense into morning dew.

What causes concrete to sweat?

  • SSS or sweating slab syndrome is a phenomenon where moisture intermittently develops on the surface of an interior concrete slab.
  • The combination of temperature swings and humidity build up cause the concrete to sweat.

Why is concrete sweating problematic?

  • Concrete sweating make concrete slippery and can be dangerous on larger concrete slabs with a lot of traffic.

How to stop concrete sweating

  1. Dry out the room by air movement: a high volume low speed fan works well.
  2. Turn down the air conditioning/turn up the heat to keep the concrete floor temperature and the air temperature at similiar levels.
  3. Use a dehumidifier to remove moisture from the air and reduce the condensation.
  4. Use a penetrating sealer to seal the concrete and keep out moisture. We recommend using a concrete densifier first as a primer followed up a penetrating stain repellent.

It is important to use a penetrating concrete sealer as soon as possible so that you do not have to deal with mold or mildew issues which are a result of concrete sweating.

Why Ghostshield?

When concrete sweats it draws out grease and oil residue that may have previously seeped into the concrete pores. By using the SILOXA-TEK 8510 penetrating concrete sealer, oil and greases are kept out of the concrete emilinating staining. Siloxa-Tek 8510 is also a salt repellent concrete sealer so it will protect the concrete floor from any spalling, pitting and cracking. Use the LITHI-TEK 4500 first as a primer to reduce the porosity of the concrete. The combination of these two products will also reduce any mold and mildew that may accumulate as a result of concrete sweating.

Siloxa-Tek 8510

Penetrating water & oil repel

Lithi-Tek 4500

Concrete densifier & hardener

Published Thursday 20th of February 2014 // Updated Wednesday 15th of August 2018

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