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3M™ Glass Bubbles K15

Glass Bubbles
Glass Bubbles
3M(TM) Glass Bubbles K15
3M™ Glass Bubbles K15 have a density of 0.15 g/cc and an isostatic crush strength of 300 psi. The general purpose K Series glass bubbles are the most economical 3M glass bubbles.
  • Lower viscosity, improved flow
  • Increased filler loading, reduced cost
  • VOC reduction
  • Chemical stability and inertness
  • Reduced dielectric constant
  • Thermal conductivity reduction
  • Temperature resistance
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With low density (0.15 g/cc) and isostatic strength good to 300 psi, 3M glass bubbles K15 are ideal for use in a variety of water buoyancy applications, including additives in buoys and moorings. Like all 3M glass bubbles, K15 bubbles are compatible thermoset resins like polyurethane and epoxy, and are virtually insoluble in water.

Typical Properties

CapabilitiesTemperature Resistance, Lightweighting, Chemical Resistance
Color (unaided eye)White, powdery
CompositionSoda-lime-borosilicate glass
Crush Strength (PSI)300
Density (g/cc)0.15
IndustriesPaints and Coatings, Transportation, Insulation and Buoyancy, Mining
Particle Size (D50 Micron)60
Particle Size Range (D50 Micron)60 - 69
ShapeHollow spheres with thin walls
Sizes AvailableBulk Sea Container with Liner, Bulk Trailer, Small Box (10 lb, 4.5 kg), Small Box (50 lb, 22.6 kg), Large Box (250 lb, 113 kg), 4 ft Bag (260 lb, 118 kg), 1 Gallon Container (0.5 lb, 0.2 kg), Large Box (249 lb, 113 kg), Large Box with Special Liner (250 lb, 113 kg)
Strength (MPa)2