A high density, high impact, high strength, microspheres used as a bulking agent for adhesives and castings. It can be added to adhesives like Paraloid B72, B48N and epoxy resins to create a thixotropic mix, ideal for gap filling. The spheres are also great for supporting delicate objects undergoing repair or reconstruction (i.e. ceramics and porcelain). Available in three sizes - (1) 1.00mm to 1.25mm - for filling voids, particularly woodworm holes etc, (2) 2.00mm size spheres for larger fills and securing ceramic and glass items during repair and (3) fine for bulking out acrylic and epoxy fills.