3M™ Glass Bubbles S42XHS are hollow microspheres made of soda-lime borosilicate glass with a true density of 0.42 g/cm³ and an isostatic crush strength of 8000 psi / 550 bar.
The K46 Glass Bubbles grade can be used in insulation coatings for pipelines in deep and ultra deep water applications in the oil and gas industry.