Since 1954, Supreme Perlite Company in Portland, Oregon has supplied the Pacific Northwest with high-quality expanded perlite for various applications. From horticulture and construction to environmental and industrial uses, Supreme Perlite offers a versatile volcanic glass material to improve drainage, insulation, and filtration. Choose from among a range of sizes and densities and packaging sizes from 8 QT small to bulk super sacks containing greater than 2 cubic yards of material each. Each product is sold in bags or bulk bags. Pricing depends on grade/application, volume and packaging format. Products are sold through wholesale distributors and retailers. They are not available for purchase from our plant. Industry/Services Covered: 1. Agricultural soil amendments: a. horticultural grade expanded perlite b. Fine expanded perlite c. Medium expanded perlite d. Coarse expanded perlite e. Super Coarse expanded perlite f. OMRI Listed perlite products g. Organic certified perlite products 2.