3M™ Glass Bubbles S38HS have a density of 0.38 g/cc and an isostatic crush strength of 5500 psi. The S Series glass bubbles have smaller particle sizes than the K Series. The S38HS has a higher crush strength than the S38 glass bubble.
The high strength of 3M's38HS glass bubbles (rated to 5500 psi) means they can survive both the rigorous demands of processing and the enormous water pressure at depth. In turn, their low thermal conductivity makes them ideal additives in insulation for pipelines and production risers helping to ensure that hot oil continues to flow to the surface, rather than cooling and slowing. Like all 3M glass bubbles, S38HS glass bubbles are virtually insoluble in water or oil.
Increased Production Throughput, Lightweighting, Temperature Resistance, Chemical Resistance
Color (unaided eye)
Crush Strength (PSI)
Density Range (g/cc)
0.30 - 0.39
Paints and Coatings, Rubber and Plastic, Compounding, Insulation and Buoyancy, Transportation
Particle Size (D50 Micron)
Particle Size Range (D50 Micron)
40 - 49
Hollow spheres with thin walls
Supersack (700 lb, 317.5 kg), 1 Gallon Container (1.5 lb, 0.6 kg), Large Box (650 lb, 295 kg), Bulk Trailer, Small Box (100 lb, 45.4 kg)