buddingco polymeric sand - white 18lbs joint stabilizing sand for pavers buddingco polymeric sand is a unique mixture of polymer binders and calibrated sand available in grey. the installation of poly sand is almost identical to using regular paver joint sand except for the application of water. once polymeric sand sets, it becomes very firm and locks between the paver joints while still retaining flexibility and providing a long lasting, durable jointing material. polymeric sand is recommended for a variety of uses including pool decks, patios, footpaths, driveways, parking spaces, pavements etc.polymeric sand is recommended for a variety of uses including pool decks, patios, footpaths, driveways, parking spaces, pavements etc. the concrete pavers must be installed on a drainage base system composed of 2 layers. the upper layer can have a maximum of 1 inch (2.5 cm) of bedding sand. the lower layer must have a minimum of 6 inches (15.4 cm) of crushed stone compacted at 98 % proctor density.