Wholesale Expanded Perlite 2-4mm Porous Lightweight Horticulture Growing Medium

Our expanded perlite is processed from natural volcanic glass ore. The raw ore is crushed and screened, then rapidly heated to 760–1100°C inside the expansion furnace. The internal water vaporizes and expands the ore volume up to 7–20 times, forming porous lightweight particles with honeycomb internal structure.

It is a chemically inert inorganic mineral material with neutral pH, non-toxic, sterile, weed-seed free and non-combustible. It features low bulk density, low thermal conductivity, excellent air permeability and sound absorption performance. Different particle sizes and grades can be produced for diversified markets, including coarse granules for horticulture, medium particles for thermal insulation, fine powder for filtration and filling.

It is widely used in horticultural growing media, building lightweight insulation, refractory materials, industrial filter aids, paint and rubber fillers, cryogenic insulation and sound-absorbing materials. Small bags suit garden retailers and small manufacturers, while ton bags and bulk shipments serve large nurseries, insulation factories and industrial production lines. Large orders support custom particle size screening and private-label packaging.

Important note: Fine dust may be generated during handling. Wear dust mask during operation. Not for human consumption.