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Bostik Dustproofer & Hardener is a colourless, viscous liquid based on Sodium Silicate that is formulated for hardening and dustproofing old or new concrete floors. It penetrates the surface and combines with the hydrated cement to give long lasting protection. It extends the life of concrete and terrazzo floors and makes them easier to clean and maintain. It is ideal for garages and workshops, factory floors and public areas as it improves resistance to chemicals, oil, grease and abrasion. Hardens and dustproofs concrete floors. Improves resistance to oil, chemicals and abrasion. Ideal for workshops and garage floors.