- Reduction of density and improving buoyancy
- Thermal condutivity reduction
- Higher filler loading feasible and lower VOC for paints and coatings
- Good strength-to-density ratio
- Reduced dielectric constant
- Temperature resistance
- Chemical stability and inertness
3M™ Glass Bubbles K20HS are hollow microspheres made of soda-lime borosilicate glass with a true density of 0.20 g/cm³ and an isostatic crush strength of 750 psi / 52 bar.