Close
S28HS Hollow Glass Microspheres are high-strength, hollow spherical glass particles engineered for applications that demand superior mechanical integrity, pressure resistance and long-term durability, while still achieving meaningful weight reduction. Manufactured from soda-lime borosilicate glass, S28HS offers significantly higher crush strength compared to standard grades, making it suitable for high-stress and load-bearing systems.
The uniform spherical morphology of S28HS enables excellent flow, reduced viscosity build-up and improved dispersion in cementitious systems, polymers, composites, coatings, adhesives and sealants. Its chemically inert, non-combustible nature ensures reliable performance in aggressive chemical, thermal and environmental conditions. S28HS is particularly suited for industrial, automotive, oil & gas, defense and anti-corrosion applications where conventional fillers fail to meet strength requirements.
The high strength of S28HS glass bubbles enables them to withstand high processing pressures encountered during polymer compounding and extrusion, as well as the hydrostatic pressure of seawater in many marine and offshore environments. S28HS microspheres are engineered to provide an excellent strength-to-density ratio, allowing meaningful lightweighting while maintaining mechanical integrity during processing and in-service conditions. These general-purpose high-strength microspheres are widely used across demanding applications such as oil & gas, coatings, adhesives, mastics, sealants, and thermoset resin systems, where durability, processing stability and long-term performance are essential.
Typical performance reference: S28HS glass bubbles offer isostatic crush strength performance specified for high-strength microspheres; always refer to the latest manufacturer TDS/SDS for the exact grade test method and specification limits.
Lightweight concrete, grouts and repair mortars
Structural and semi-structural precast elements
Flooring systems and cement-based insulation layers
Thermoset composites (epoxy, polyester, vinyl ester)
Thermoplastic compounds requiring higher strength retention
Molded structural and semi-structural components
Sheet Molding Compounds (SMC) and Bulk Molding Compounds (BMC)
Automotive, electrical and industrial molded parts
Improved flow, surface finish and dimensional stability
Underbody PVC plastisol coatings for stone-chip resistance and NVH control
Automotive body fillers, putties and reinforcement compounds
Lightweight structural and vibration-damping components
Anti-corrosive coatings for steel and concrete protection
High-build industrial and protective coatings
Sandable coatings, primers and surface fillers
Thermal and sound-dampening coatings
External and internal pipe coatings for oil, gas and water pipelines
Improved film build, reduced density and enhanced durability
Long-term corrosion protection systems
Defense-grade composite panels and structural components
Equipment housings and lightweight structural fillers
High strength-to-weight applications requiring reliability
Bulk emulsion explosives and ANFO formulations
Density control with improved mechanical robustness
Stable pumpable explosive systems under harsh handling conditions
| Property | Typical Value |
|---|---|
| Appearance | White, free-flowing powder |
| True Density | ~0.280 g/cc |
| Crush Strength (Isostatic) | ~3 psi |
| Average Particle Size (D50) | ~30 µm |
| Chemical Composition | Soda-lime borosilicate glass |
| Shape | Hollow spherical |
| Solubility | Insoluble in water |
| Combustibility | Non-combustible |
S28HS Hollow Glass Microspheres are non-hazardous under normal industrial handling conditions. Avoid excessive dust generation. Use appropriate personal protective equipment such as safety glasses, gloves and dust masks. Refer to the latest Safety Data Sheet (SDS) before use.
Store in a cool, dry and well-ventilated area, protected from moisture and contamination. Keep containers tightly closed when not in use.