expande perlite(paint) Size:1-2mm,2-4mm,3-6mm Usage:Horticultre,Agriculture,Gardening. expande perlite(paint)It can be sused to filter liquor,oil,medicine,food and dirty water.It can be used as filling and dilating agent in rubber,painter and plastice,etc.It can be used as catalyst in explosives.It can be used to absorb floating oil.