Pentra®-Sil (HDS)

Color Shielding, Hardener, Densifier, Sealer

Pentra®-Sil (HDS) is a specially formulated penetrating hardener, densifier and sealer for colored, dyed or acid stained concrete and terrazzo surfaces. Ideal for the grinding and polishing process of integrally colored, dyed or acid-stained concrete. With color enhancing and efflorescence control, this densifier substantially enhances the color depth, increases the abrasion resistance and protects against water and/or other contaminants. Ideal for re-polishing and restoring worn and damaged surfaces.

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



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Pentra®-Sil (HDS) is engineered for polished, colored, dyed or acid stained cementitious surfaces and is ideal for polishing and restoring worn and damaged flooring. This eco-friendly lithium solution hardens, densifies, and seals concrete, overlays, and terrazzo. It enhances color, increases abrasion resistance and protects against staining. Pentra®-Sil (HDS) minimizes salt damage, is easy to use, and is VOC compliant.

  • High solids formula improves polishing results
  • Enhances and protects dyed, stained and integrally colored concrete
  • Hardens, densifies, and dust-proofs
  • Easy-to-use, no rinsing required
  • Defends against water, stains, and harmful substances
  • Breathable–allows interior moisture to escape without damaging sealer
  • Penetrates–no film to lift or peel off
  • Protects against salt and freeze/thaw damage
  • Reduces efflorescence and surface sweating
  • Does not contribute to surface ASR or promote crazing
  • VOC compliant, may contribute to LEED points (IEQ credit)

Enhances Color

Prolongs Polished Surface Durability

Ideal for Decorative Concrete


Application Method: Sprayer
Color: Red tint, dries clear
Coverage Rate: 14.7-19.6 m² per liter (600-800 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: 1.1
Total Solids: 17.1%
VOC Content: <50g/L