Perlite, Ultra-Lightweight Aggregate

Expanded perlite is a white, ultra-lightweight aggregate ranging from a very fine powder to an aggregate with a particle size up to 6mm in size. It is inorganic, inert, neutral in pH, biologically stable and has no asbestos content. It has excellent thermal insulation properties over an extremely wide temperature range from cryogenics at minus 273°C (absolute zero) up to refractory applications at over 1000°C. It also has a highly adsorbent surface and a very low bulk density which makes it an ideal carrier or low cost filler for many compound formulations.

What is Perlite?

Perlite is a white, ultra-lightweight aggregate ranging from a very fine powder to an aggregate with a particle size up to 6mm in size

What can it be used for?

Perlite is widely used in commercial hydoponics, seed starting and plant rooting, as a soil conditioner, and to enhance the water-holding and anti-compaction properties of growing soils.

What grades are available?

Perlite can be supplied in a number of grades, dependant on the particular requirements of the application.

Perlite Grades



Non-combustible ultra-lightweight mineral aggregate with excellent insulation & adsorption properties


Silvaperl's exfoliated vermiculite and expanded perlite are absorbents and carriers. Each of these unique minerals have their own characteristics


Perlite insulation is used in high temperature applications in the steel and foundry industries such as ladle topping, hot topping and risering, in topping...

Cavity Fill

Silvapor coated expanded perlite is a hydrophobic insulating aggregate. This water repellent, non-flammable, loose-pour insulant improves the thermal performance on masonry walls and floors.


Due to its high insulating qualities and versatility expanded perlite is widely used in the construction industry for masonry and other build types. Because...


Expanded Perlite is suitable for a range of landscaping applications such as green roof construction, golf green renovation and construction, planters, drainage and reduction...

Perlite Grades

Name Nominal Size (mm) Loose Poured Bulk Density (kg/m) Datasheets
P0 Micronised 0.01 – 0.5 65 – 95 Download PDF file P0
P3 LW Cryogenic 0.75 – 1.2 35 – 55 (LW) Download PDF fileP3LW
P3 HD Extra fine 0.75 – 1.2 55 – 85 (HD) Download PDF fileP3HD
P05 Ultrafine 0.01 – 1.0 90 – 180 Download PDF file P05
P10s Super Fine 0.75 – 2.0 80 – 100 Download PDF file P10S
P10B High Fine 0.75 – 2.5 80 – 110 Download PDF file P10B
P15 Medium 0.75 – 3.0 90 – 130 Download PDF file P15
P25 Special 1.0 – 3.0 90 – 120 Download PDF file P25
P35 Standard 1.0 – 5.0 90 – 120 Download PDF file P35
P45 Supercoarse 1.0 – 5.0 90 – 120 Download PDF file P45
SILVAPOR 1.0 – 5.0 110 – 130 Download PDF file SILVAPOR