Home - Perlite / Perlite Microspheres Product Portfolio | RBH Ltd Perlite / Perlite Microspheres Lightweight expanded perlite and perlite microsphere grades providing thermal insulation, density reduction and functional filler performance across construction, coatings, composites and industrial applications. CAS NUMBER: 93763-70-3 Enquire Now Names Perlite|Expanded Perlite|Perlite Microspheres Product Overview Perlite is a naturally occurring volcanic alumino-silicate mineral that expands when rapidly heated, forming a highly porous, lightweight material with excellent thermal insulation and low density. RBH supplies both expanded perlite and perlite microsphere grades designed to reduce weight, improve insulation and enhance formulation performance across a wide range of industrial applications. Perlite microspheres offer finer particle size, improved flow characteristics and more uniform density compared to standard expanded perlite, making them particularly suitable for coatings, composites, sealants and speciality formulations where controlled density reduction and surface finish are important. Expanded perlite grades are widely used in construction materials, insulation systems and industrial fillers where bulk density reduction, fire resistance and thermal performance are required. Both product forms provide chemical inertness, low thermal conductivity and resistance to moisture and biological attack, supporting durable performance in demanding environments. Technical Profile Technical Profile Key Industries Packaging & Availability Technical Profile of Perlite / Perlite Microspheres Expanded volcanic mineral products offering lightweight structure, thermal insulation and functional filler performance. Molar Weight Variable mineral composition Melting Point >870 °C (softens) Boiling Point Not applicable Flash Point Non combustible Form White to off white lightweight granular or microsphere powder Key Industries of Perlite / Perlite Microspheres Industries served by this product. Adhesives, Sealants & Construction RBH supplies specialist raw materials for adhesives, sealants, and construction applications, supporting structural, functional, and laminating systems. Our market-driven approach combines high performance materials with technical expertise to address complex formulation challenges and evolving industry requirements. find out more Ceramics RBH supplies specialist materials for ceramic manufacture and raw material processing, supporting formulation performance, product quality, and processing efficiency across industrial, technical, and functional ceramic applications. find out more Coatings RBH supplies specialist raw materials for decorative, industrial, powder, and ink coating systems, supporting consistent formulation and dependable performance. Our portfolio includes functional minerals, additives, and base materials designed to meet the technical demands of modern coating manufacture across a wide range of applications. find out more Composites RBH supplies specialist raw materials for composite applications, supporting high-performance, lightweight solutions across a wide range of industries. Our market-led approach combines trusted global supply with technical expertise to meet the evolving demands of modern composite manufacture. find out more Environmental RBH supplies functional materials and specialist chemicals for environmental applications including air and gas treatment, water purification, wastewater treatment, odour control, and filtration systems. Our solutions support performance, compliance, and process efficiency in environmental processes. find out more Lubricants & Oils RBH supplies a portfolio of functional additives and performance materials for lubricants and oils, helping formulators enhance product stability, friction control, and thermal performance across industrial and automotive applications. Our specialist materials support reliable, high-performance lubricant formulations that meet evolving regulatory and market requirements. find out more Refractories RBH supplies high quality minerals and specialist raw materials for refractory formulations, supporting thermal stability, durability, and process reliability in high temperature applications across a wide range of industrial applications. find out more Plastics & Thermoplastics RBH supplies specialist additives and mineral fillers for thermoplastic applications, supporting performance, protection, and process efficiency across a wide range of plastic formulations. find out more Rubber RBH supplies specialist raw materials and additives for rubber formulations, supporting performance, processing efficiency, and durability across a wide range of elastomer applications. find out more Packaging & Availability Available in multiple packaging formats to suit your processing needs, supplied under ISO 9001 quality management systems. Contact RBH for regional stock or customised packing options. 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