Pentra®-Sil (AC)

Alkalinity Control Formula Primer

Pentra®-Sil (AC) Advanced Lithium Alkalinity Control Formula Primer is specifically designed for use on sweating or efflorescing floors as a pre-treatment for Pentra-Sil. The unique treatment will neutralize substrate surfaces suffering from alkalinity problems. It reduces sweating of the concrete surface, neutralizes surfaces treated with sodium or potassium silicates and reduces vapor drive that carries the alkaline salts to the surface of the concrete.

20 L Basket
200 L Drum
600 L Tote
1000 L Tote (IBC)



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Pentra®-Sil (AC) is an advanced alkalinity control treatment that reacts with concrete to neutralize its pH levels. Through this permanent reaction, slab sweating and efflorescence is significantly reduced. The lithium silicate in this product also densifies and hardens the surface, increasing abrasion resistance.

  • Reduces sweating and efflorescence
  • Neutralizes the surface and reduces alkalinity
  • Reduces vapor drive that carries alkaline salts to the surface of concrete
  • Densifies and hardens the surface to increase abrasion resistance
  • VOC compliant, may contribute to LEED points (IEQ credit)

Equalizes Surface pH

Mitigates Efflorescence and Sweating Slab Syndrome

Increases Suface Durability


Application Method: Sprayer
Color: Opaque, dries clear
Coverage Rate: Machine-troweled: 9.8-13.5 m² per liter (400-550 ft² per gallon); Broom-finished: 6.1-8.6 m² per liter (250-350 ft² per gallon)
Film-Forming: No
Form: Liquid
Freeze Point: 0ºC (32ºF)
Odor: Slight to none
pH: 11-12
Shelf Life: 1 year in unopened, sealed container
Specific Gravity: 1.05
Total Solids: 7.40%
VOC Content: <50g/L