What causes concrete to sweat? When warm air comes into contact with a colder temperature concrete slab, the condensation will build up on the surface and can commonly be defined as concrete sweating. The combination of temperature swings and humidity build up cause the concrete to sweat.
How do you prevent concrete sweating?
- Dry out the room by air movement: a high volume low speed fan works well.
- Turn down the air conditioning/turn up the heat to keep the concrete floor temperature and the air temperature at similiar levels.
- Use a dehumidifier to remove moisture from the air and reduce the condensation.
- 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.
Mold and mildew are a result of concrete sweating so using a penetrating concrete sealer at the first signs of concrete sweating is ideal.
Use the LITHI-TEK 4500 first as a primer to reduce the porosity of the concrete. 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. The combination of these two products will prevent concrete sweating also and reduce any mold and mildew that may accumulate.