3M Glass Bubbles S15 Low-Density Hollow Glass Microspheres for Coatings & Buoyancy Materials

Full Name & Product Positioning

Full Product Name: 3M S15 Low-Density Medium-Crush Hollow Glass Microspheres

An entry-level grade of S series, it retains low-density advantage with comprehensively improved crush resistance over K series. Suitable for low-shear coatings and buoyancy products requiring mild pressure resistance, it balances lightweight performance and processing stability.

Core Technical Parameters

True Density: 0.15 g/cm³
Crush Strength: 2000 psi
Physical Form: Ultra-fine white powder
Standard Packaging: 120kg/Industrial bulk packaging
Material: High-strength hollow borosilicate glass
Core Characteristics: Low density, medium pressure resistance, mild shear resistance, high stability

Core Advantages

1. Far higher crush resistance than K series at the same density with extremely low microsphere breakage rate during processing;
2. Excellent lightweight effect, suitable for various low-density buoyancy products and lightweight coatings;
3. Tolerates mild temperature and pressure processing, compatible with conventional spraying, casting and low-speed stirring processes;
4. Fine impurity-free powder ensures flat and flawless product surface after filling;
5. Good dimensional stability with no shrinkage or deformation after curing, ensuring high finished product yield.

Main Application Fields

Core Applications: Industrial lightweight coatings, water floating materials, low-pressure casting products
Compatible Fields: Thermal insulation coatings, lightweight seal products, low-stress composite materials
Prohibited Scenarios: High-shear injection & extrusion, ultra-high pressure deep-sea working conditions, food-contact products