No / Low Flow Prepreg

For bonding and adhesion applications, Isola offers materials that provide minimum resin flow and consistent lamination characteristics. Uneven surfaces are completely enclosed and embedded maintaining consistent layer-­to-­layer spacing.

Isola No Flow and Low­Flo® materials demonstrate excellent bonding on various surfaces and can be processed with flex films, such as Mylar®, Kapton®, etc., plain/abrasive copper surfaces, plated metals (tin, solder, nickel etc.), as well as conventional laminate surfaces. We offer three different resin systems in its No Flow and Low­Flo® family to support your application.
A11 and FR406N are epoxy resin systems. A11, with its Tg of 100°C, is suitable for standard applications. FR406N has a Tg of 170°C and was specially designed for high temperature applications. Both epoxy resin systems used standard processing methods.
P25N is a polyimide for high temperature applications such as military, commercial or industrial electronics. It offers a high Tg of 250°C and extended time to delamination (T260: 60 min/ T288: 60 min). This resin system reduces brittleness and offers a greater interlaminate adhesion (peel strength) compared to other polyimide materials.



  • Products are available in 106 & 1080 in multiple flow ranges
  • Easy processing
  • Compatible for bonding with a variety of surfaces

Typical Applications

  • Heat­sink bonding
  • Cavity boards (direct chip attachment)
  • Mulitlayer rigid flex applications in complex three-dimensional installation locations
  • Laminated insulators
  • Other applications requiring minimal or uniform resin flow


Related Materials From Isola

Tg: 170°C
Td: 300°C
Dk: 4.3
Df: 0.025
View Details
Tg: 250°C
Td: 383°C
Dk: 3.67
Df: 0.018
View Details


Prepreg Selection: Individual Dielectric Space

This application note discusses how a PCB fabricator use a slightly different method of selecting prepreg to achieve specific thickness and fill requirements.

Contact Our Team For Product Information

Laminates, Prepreg, & PCB Materials

    Isola needs the contact information you provide to us to contact you about our products and services. You may unsubscribe from these communications at any time. For information on how to unsubscribe, as well as our privacy practices and commitment to protecting your privacy, please review our Privacy Policy.