Pentra®-Sil (H)

At-Time-of-Placement Hardener

Pentra®-Sil (H) is a premium lithium polysilicate hardener for fresh, newly- troweled concrete and tilt-up construction slabs. This fast-drying reactive formula provides maximum hardening to improve abrasion resistance and reduce dusting with a simple, one-coat application. Curing compounds can be applied directly on top of treated surfaces to enhance hydration without the discoloration and whitening associated with traditional hardeners.

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



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Pentra®-Sil (H) provides maximum hardening for concrete slabs and tilt-up construction. This lithium-based product reduces dusting and makes the surface more water, stain and abrasion resistant while increasing surface sheen over time. Pentra®-Sil (H) is applied in one application, will not peel, and no rinsing is required. This solution is VOC compliant and easy to apply.

  • Easy application, no rinsing required
  • Penetrates, no film to lift or peel off
  • Bond-breakers can be applied directly on top for tilt-up construction applications
  • Reduces efflorescence and surface sweating
  • Does not contribute to surface ASR, or surface crazing
  • Compatible with integrally colored concrete, stains and dyes
  • Curing compounds are more easily removed with scrubbing
  • Resists stains and dusting, making concrete easier to maintain
  • VOC compliant, may contribute to LEED points (IEQ credit)

No Rinsing Required


Pre-cure Hardener


Application Method: Sprayer
Color: Opaque, dries clear
Coverage Rate: 11-16 m² per liter (450-650 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: 1.06
Total Solids: 9%
VOC Content: <50g/L