3M Glass Bubbles K15 Low-Density Hollow Glass Microspheres for Coatings & Epoxy Casting

Full Name & Product Positioning

Full Product Name: 3M K15 Universal Low-Density Hollow Glass Microspheres

As a classic entry-level lightweight microsphere with ultra-low density and wide applicability, K15 focuses on lightweight modification for coatings, epoxy casting and low-shear adhesive systems, serving as a mainstream universal lightweight filling grade for industrial applications.

Core Technical Parameters

True Density: 0.15 g/cm³
Crush Strength: 600 psi
Physical Form: White fluffy powder
Standard Packaging: Industrial bulk packaging
Material: Hollow borosilicate glass
Core Characteristics: Lightweight, easy dispersion, low shrinkage, thermal & dimensional stability

Core Advantages

1. Excellent lightweight effect that significantly reduces density of coatings and cast products for weight reduction and efficiency improvement;
2. Superior wettability and dispensability, uniform mixing achievable with ordinary stirring equipment with low processing threshold;
3. Effectively inhibits curing shrinkage of systems and reduces product deformation and cracking;
4. Good heat insulation, sound insulation and insulation performance, compatible with various normal-temperature industrial systems;
5. High universality and cost performance, suitable for mass lightweight production.

Main Application Fields

Core Applications: Industrial paints, architectural coatings, epoxy casting products, ordinary sealants
Compatible Fields: Lightweight composite materials, thermal insulation coatings, craft lightweight modification
Prohibited Scenarios: High-shear injection & extrusion, high-pressure molding, food-contact products, high-strength structural parts