Techniseal® HD Paver Prep is specially formulated to dissolve tough efflorescence (whitish salt) and remove ground-in dirt (traffic marks, etc.) on pavers, slabs and retaining walls made of concrete. This ultra-powerful formula works deep without discolouring or damaging the surface. HD Paver Preparator brightens up the colour, cleans evenly and enables sealant to better penetrate the material. Techniseal® adaptable Exact Sprayer (sold separately) makes application easier and quicker. Specifications: - Specially formulated to remove tough efflorescence - Prepares pavers prior to sealant application - Brightens up the colour of pavers - Concentrated- Just dilute into water Product type : Cleaner Surface type : Concrete Paver, Concrete Slab, Interlocking Paver Coverage : 4L of concentrated solution cleans up to 19 m2 (200 sq. ft.) Note that actual coverage may vary depending on product dilution and surface condition.