1. United Kingdom
  2. All 3M Products
  3. Advanced Materials
  4. Glass Bubbles
  5. 3M™ Glass Bubbles K20 300 kg/LG Bag

3M™ Glass Bubbles K20 300 kg/LG Bag

  • 3M Product Number K20
  • 3M ID 7000079825
Change options
Typical Density 0.2 g/cc
Crush Strength (Metric) 3.45 MPa (80% Minimum Fractional Survival)
Typical Median Particle Diameter 60 µm
Net Weight (Imperial) 661.5 lb.
Net Weight (Metric) 300 kg
Crush Strength (Imperial) 500 psi (80% Minimum Fractional Survival)

Reduction of density and improving buoyancy

Thermal condutivity reduction

Higher filler loading feasible and lower VOC for paints and coatings

View more details
Find a Preferred Partner

Details

Highlights

  • Reduction of density and improving buoyancy
  • Thermal condutivity reduction
  • Higher filler loading feasible and lower VOC for paints and coatings
  • Good strength-to-density ratio
  • Reduced dielectric constant
  • Temperature resistance
  • Chemical stability and inertness

3M™ Glass Bubbles K20 are hollow microspheres made of soda-lime borosilicate glass with a true density of 0.20 g/cm³ and an isostatic crush strength of 750 psi / 52 bar.

The K20 Glass Bubbles can be compounded in a variety of thermoset polymers to reduce the density of the composite. These composites can be incorporated into deep sea syntatctic foam for buoyancy modules to improve the uplift properties of a system at minimal foam volumes. They offer good strength-to density ratio, making them suitable for a variety of applications: buoyancy, coatings, adhesives, sealants, and thermoset resins systems.

Specifications

Resources

Support

Connect with us. We’re here to help.

Need help finding the right product for your project? Contact us if you need product, technical or application advice or want to collaborate with a 3M technical specialist

Send Us a Message

Thank you for your interest in 3M. In order to help us manage and respond to your query effectively, we politely ask you to provide some key information, including your contact details. The information you provide will be used to respond to your request through email or telephone by a 3M representative or one of our authorised business partners with whom we might share your personal information consistent with the 3M privacy policy

  •  
  •  
  •  
  •  
  •  

  • 3M takes your privacy seriously. 3M and its authorized third parties will use the information you provided in accordance with our Privacy Policy to send you communications which may include promotions, product information and service offers. Please be aware that this information may be stored on a server located in the U.S. If you do not consent to this use of your personal information, please do not use this system.

  • Send Message

Thank you for your contacting 3M

We have received your message and are now looking into your enquiry
One of our representatives will get in touch with you by phone or email

An error occurred.

Similar products

Current product

3M_GlassBubbles_K20HS.tif3M™ Glass Bubbles K20 300 kg/LG Bag
admd-glass-bubbles-K15HSN-product-image-3000x3000.tif3M™ Glass Bubbles K15HSN
Typical Density 0.2 g/cc
Crush Strength (Metric) 3.45 MPa (80% Minimum Fractional Survival)
Typical Median Particle Diameter 60 µm
Net Weight (Imperial) 661.5 lb.
Net Weight (Metric) 300 kg
Crush Strength (Imperial) 500 psi (80% Minimum Fractional Survival)
Legal Information
|
Privacy Policy
|
Cookie Preferences
© 3M 2026. All Rights Reserved.
Follow Us
The brands listed above are trademarks of 3M.