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Holywell – Global Innovator in
Hollow Glass Microspheres

Professional supplier of high-performance Hollow Glass Microspheres (HGMs) for aerospace, oil & gas, thermal insulation, modified plastics, and advanced material applications.

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About Holywell

A trusted global partner in the innovation and manufacturing of Hollow Glass Microspheres.

Hollow Glass Microspheres

Henan Holywell Co., Ltd.

Henan Holywell Co., Ltd. is a specialized manufacturer and exporter of Hollow Glass Microspheres. Since our establishment, we have been committed to the research, development, production, and global export of high-quality HGMs.

We offer dozens of specifications of Hollow Glass Microspheres, meeting the demanding requirements of aerospace vehicles, solid buoyancy materials, reflective thermal insulation paints, low-density drilling fluids, and cement slurries.

Technological Innovation & R&D Focus
Strict Quality Management System
Global Partnerships with Industry Leaders

Vision & Mission

To become the world’s most trusted supplier of advanced lightweight materials by continuously innovating and delivering high-performance Hollow Glass Microspheres that solve complex engineering challenges across industries.

Company Value

Customer First, Quality Foremost – We strive to create greater value for our partners through superior products, responsive service, and a relentless commitment to excellence in every aspect of our operations.

Our Products

High-performance Hollow Glass Microspheres engineered for diverse industrial applications.

HL Series

HL Series

  • ✔ Easy to bond with water-based matrix
  • ✔ Crushing strength up to 20,000 psi
  • ✔ High temperature resistance
  • ✔ Good fluidity & chemical stability
  • ✔ Ideal for drilling fluids, cementing slurry, paints
HK Series

HK Series

  • ✔ Compatible with oil-based matrix
  • ✔ Crushing strength up to 20,000 psi
  • ✔ High temperature resistance
  • ✔ Excellent for modified plastics & explosives
  • ✔ Used in thermal insulation paints
HGM Standard

HGM Standard

General-purpose Hollow Glass Microspheres with true density 0.15–0.60 g/cm³, particle size 2–130 μm, wall thickness 1–2 μm. Ideal for weight reduction and cost optimization.

High-Strength HGM

High-Strength HGM

Engineered for extreme conditions with compressive strength from 300 to 18,000 psi. Suitable for deep-well cementing and high-pressure environments.

Thermal Insulation Grade

Thermal Insulation Grade

Optimized for reflective thermal insulation paints. Offers low thermal conductivity and high solar reflectance for energy-efficient coatings.

Buoyancy Grade

Buoyancy Grade

Ultra-lightweight microspheres used in marine applications, sonar domes, and subsea buoyancy modules. True density as low as 0.15 g/cm³.

Plastic Modification Grade

Plastic Modification Grade

Enhances flowability and reduces shrinkage in engineering plastics. Improves dimensional stability and surface finish.

Explosives Grade

Explosives Grade

Designed for emulsion explosives to improve sensitivity and performance. Chemically stable and non-reactive.

Why Choose Holywell HGMs?

High Performance

Compressive strength up to 20,000 psi, temperature resistance, and chemical stability for demanding applications.

Lightweight

True density from 0.15–0.60 g/cm³ enables significant weight reduction in composites and coatings.

Reliable Quality

Strict quality control ensures consistent particle size, strength, and performance across batches.

Industrial Solutions

HGMs are transforming performance across key industries.

Oil & Gas

Used in low-density drilling fluids and high-strength cementing slurries to prevent lost circulation and improve zonal isolation in challenging formations.

Modified Plastics

Enhances mechanical properties, reduces weight, and improves processability in high-end polyolefins, engineering plastics, and synthetic rubber.

Thermal Insulation Paints

Reflects sunlight and reduces heat transfer, ideal for roofs, tanks, and industrial equipment requiring energy efficiency.

Sealants & Adhesives

Improves flowability and reduces viscosity compared to irregular fillers, enhancing application and performance.

Epoxy Tooling Boards

Provides dimensional stability and lightweight structure for molds, jigs, and fixtures in aerospace and automotive.

Emulsion Explosives

Acts as a sensitizer to improve detonation performance while maintaining safety and stability.

100+
Global Clients
20,000
psi Max Strength
50+
Product Grades
15+
Years Experience

Get in Touch

For product inquiries, technical support, or partnership opportunities, visit our official website to contact the Holywell team.

Phone: +86 186 3817 6371
Email: info@cnholywell.com
Visit Official Website
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