3M™ Glass Bubbles S38HS are hollow glass spheres with a typical density of 0.38 g/cc and an isostatic crush strength of 5,500 psi. These glass bubbles are designed for buoyancy and insulation in ultra-deep water applications in oil and gas drilling. The bubbles produce strong, stable voids and low thermal conductivity, helping coatings achieve the

Strength-to-Weight Ratio

The benefits don't end there; although 3M glass bubbles S38HS have thin walls, they have a good isostatic crush strength of 5,500 psi, meaning they can survive both the rigorous demands of processing and 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. S38HS bubbles have a fractional survival rate of 80% or more, at 5,500 psi for consistent performance and greater survivability.