... gravity:0.15-2.4g/cm3 Expanded perlite 1.Expanded Perlite size :Perlite filter aid : 30-50mesh, 50-70mesh ... proofing ,light weight ,etc 5.Applications:It can be used in oxygen manufacturer and freezer as ... layer in transporting liquid oxygen and hydrogen.It can be sused to filter liquor,oil,medicine,food ... the soil and withhold water and fertilizer.It can be mixed with different benders to make templets ...