3M™ Expantrol™ Flexible Intumescent Strip E-FIS is an intumescent tape designed to seal the air spaces between doors, frames, and glass to help prevent the spread of fire, smoke, toxic gases and other by-products from penetrating into adjacent areas. Intumescent material expands and forms a hard char when exposed to heat. This flexible, conformable strip can be quickly cut to required sizes.

Effective Fire Resistance in a Convenient Tape Strip
During a fire, it’s vital that doors, frames and fire-resistant glass are properly sealed to help prevent the spread of flames, smoke and noxious gasses. Our 3M™ Expantrol™ Flexible Intumescent Strip E-FIS is an excellent solution: an intumescent adhesive strip, tested for tensile strength according to ASTM D 412-83, is conformable, flexible and easy to apply. This convenient rolled strip can be easily cut to fit a range of applications without special tools, saving time and money. The re-enterable adherent surface supports material that is designed to expand when exposed to intense heat – effectively sealing the gaps in door frames and glazing applications. This material forms a hard char that continues to resist fire and forms a smoke seal, helping eliminate the spread of smoke and other toxic by-products during and after a fire.

Recommended Applications


Sealing doors, frames and glass where fire resistance is necessary


The Science of Better Fire Protection from 3M
Since 1925 when one of our lab assistants invented masking tape, 3M has been applying science to life –developing adhesive products and technologies that help entire industries and individual businesses worldwide. The work that began with a single 3M engineer now spans decades and generations. And all of it goes into each of our adhesives, sealants, protective coatings, devices and fire resistance products including 3M™ Expantrol™ Flexible Intumescent Strip E-FIS to help businesses like yours operate faster, better and more efficiently.

• Fire resistance in a tape strip format, ideal for door frames and glazing
• Intumescent material expands when heated to seal around objects exposed to fire
• Smoke seal retards spread of toxic by-products of combustion
• Excellent flexibility for easy and cost-effective installation without special tools
• Versatile and conformable – can be cut to fit irregular shapes

• Color: Black
• Package Quantity: 10 RLS
• Product Type: Intumescent Strip
• Thickness: 0.0625 in
• Width: 0.5 in