Convergent Group SA is an International Chemicals Company located in Belgium (Europe) that specializes in manufacturing chemical concrete treatments such as hardeners, sealers and densifiers. Convergent’s portfolio spans numerous markets and product categories and are commonly used in transportation, commercial, industrial, distribution, institutional and residential projects worldwide.

Pentra-Sil® product line creates a stronger, more impenetrable, and resistant finish that is dust-proof and resistant to staining and deterioration.


  • Forms a superior protective surface layer that is breathable, dense and abrasion resistant.
  • Reduces maintenance, cleaning costs and costly repairs.
  • Conforms to "Green Leaf / LEED Qualifying" and is one of the industry's most environmentally friendly coatings.
  • Penetrates deep inside the concrete capillaries chemically reacting with the free lime forming a permanent insoluble bond with the concrete.

Pentra-Sil® (NL) is a premium lithium high-performance densifier for concrete surfaces. This high-solids formula provides maximum hardening to improve abrasion resistance and reduce dusting

Pentra-Sil® (244+) is a premium hardener, densifier and sealer with hydrophobic properties ideal for protecting concrete and masonry surfaces against the damage of winddriven rain, freeze-thaw, moisture, and chloride ion intrusion. Combines the benefits of lithium silicate densification with reactive silicone chemistry

Pentra-Guard® (HP) – hardens and seals concrete floors, producing a very hard, dust-repellent, chemical resistant and water-tight surface.