Lightweight innovation to drive sustainability

Lightweight innovation to drive sustainability

Wednesday, 6 May, 2026

The search for more sustainable, efficient and lightweight materials continues to shape trends in sectors such as composites, coatings, construction and automotive. In this context, hollow glass microspheres have established themselves as one of the most promising technologies for developing products with enhanced mechanical and thermal performance.

Comindex, S.A. has added hollow glass microspheres manufactured by Sinosteel Maanshan New Material Technology Co., Ltd. to its portfolio, since it constitutes a solution that combines low density, performance and stability thanks to its unique composition and design.

A microscopic structure with macroscopic impact

These microspheres are made from soda-lime borosilicate glass, a material that provides:

High thermal resistance
Excellent chemical stability
Low oil absorption
Good performance in both aqueous- and oil-based systems

Their spherical structure –with extremely thin walls ranging from 1 to 3.5 μm– encloses air within, enabling a significant reduction in density without compromising on mechanical strength.

In addition, their rounded shape creates the well-known ball bearing effect in formulations. This is a phenomenon that improves flowability and reduces system viscosity, facilitating processing in resins, fillers and adhesives.

Thermal insulation and energy efficiency

One of the most notable advantages of these glass microcapsules is their ability to reduce heat transfer. The internal air cavity acts as a thermal barrier, resulting in:

Improved energy efficiency in coatings and construction applications
Reduced heat or cold loss in industrial systems
Lower overall energy consumption

The stability of glass under rapid temperature changes also enhances the durability of the final product by minimising instances of cracking, flaking and thermal shrinkage.

Key advantages across multiple formulations

The use of hollow glass microspheres significantly enhances the performance of a wide range of materials. Key benefits include:

Weight reduction without loss of strength
Improved thermal performance (insulation and stability)
Increased flexibility and reduced shrinkage in coatings and composites
Reduced VOC content, by lowering the amount of solvents and absorbent fillers
More efficient processing due to improved rheology

Applications in strategic sectors

The versatility of these microspheres makes them an ideal additive for a wide range of industries seeking more efficient and sustainable materials:

Insulating paints and coatings
Composites for automotive, marine, aerospace and sanitary applications
Fillers and repair systems
Adhesives and sealants
Low-density cement slurries for construction
PVC formulations and technical plastic compounds

Comindex offers a comprehensive range of microspheres with different densities, particle sizes and compressive strengths, enabling tailored solutions for each formulation or process.

At Comindex –part of IMPAG Group– we can support you throughout your process. Simply contact our team of technical sales advisors.

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