3M Glass Bubbles K20 Medium-Low-Density Hollow Glass Microspheres for Sealants & Artificial Stone

Full Name & Product Positioning Full Product Name: 3M K20 Balanced Low-Density Hollow Glass Microspheres (Korean Imported) Balancing lightweight performance and basic crush resistance with moderate density and high stability, K20 is mainly used for sealants, artificial stone and general coating systems to solve product shrinkage, deformation and overweight issues, ideal for mass production. Core Technical Parameters True Density: 0.20 g/cm³ Crush Strength: 500 psi Physical Form: Uniform white powder Standard Packaging: 150kg/Korean original bulk packaging Material: Hollow borosilicate glass Core Characteristics: Lightweight, low shrinkage, high stability, compatible with glue and stone materials Core Advantages 1. Moderate density balances lightweight effect and product strength without affecting basic mechanical properties of substrates; 2. Greatly reduces curing shrinkage of sealants and artificial stone to avoid cracking and warping; 3. Excellent powder compatibility with silicone, epoxy, PU and various adhesive systems; 4. Imported grade with high batch stability, minimal color difference and performance fluctuation for stable mass production; 5. Improves thermal and sound insulation performance to optimize overall product texture. Main Application Fields Core Applications: Various sealants, artificial stone panels, general industrial color-adjustable coatings Compatible Fields: Lightweight composite materials, thermal & sound insulation profiles, architectural decorative coatings Prohibited Scenarios: High-shear injection & extrusion, high-pressure high-strength structural parts, food-contact products