3-way Foil-Scrim-Kraft backing, combined with aggressive cold weather solvent acrylic adhesive, protected by an easy-release silicone release paper.

> 3-way Foil-Scrim-Kraft provides excellent reflection of both heat and light.
> Cold weather adhesive with strong adhesion offers good sealing and bonding on Foil-Scrim-Kraft Facing joints and seams in HVAC ductwork applications.
> Good aging resistance, both indoors and outdoors.
> Low moisture vapor transmission rate offers excellent sealing and patching performance.

HVAC industry for joining and sealing Foil-Scrim-Kraft Facing laminated fiberglass blanket / duct board joints and seams; joining and sealing flexible air duct seams and connections. May also be used for other industrial uses requiring a tape with these characteristics and benefits.

12 months when stored at 21°C (70°F) / 50% relative humidity out of direct sunlight.

It is essential, as with all pressure-sensitive tapes, that the surface to which the tape is applied must be clean, dry, free of grease, oil or other contaminants.

It is essential that the user evaluate the products to determine whether it is fit for a particular purpose and user’s method of application. Good results will be obtained when applied to a clean, dry surface with a suitable pressure on products between +10 ~ +40°C (+50 ~ +105 °F).



 120 Micron


 75 - 100 - 125 mm


 45,7 m

  Metric English Test method
Backing thickness 120 Micron 4.8 Mil PSTC-133 / ASTM D 3652
Total thickness 170 Micron 6.8 Mil PSTC-133 / ASTM D 3652
Adhesion to steel 16 N/25mm 57.6 Oz./In. PSTC-101 / ASTM D 3330
Rolling ball tack test 5 cm 2.0 In. PSTC-6 / ASTM D 3121
Tensile strength 120 N/25mm 27.3 Lb/In PSTC-131 / ASTM D 3759
Elongation 2.0 % 2.0 % PSTC-131 / ASTM D 3759
Service temperature -35 ~ +80 °C -31 ~ +176 °F  -

The physical properties of the products shown above are obtained from test methods defined by Technical Standards Authorities, Quality Assurance and Technical Service Departments and do not represent a guarantee of product performance. Individual tapes may vary from these parameters and in all applications the end user should determine whether the product is fit for a particular purpose and is suitable for the user’s method of application before use.

L’ISOLANTE K-FLEX reserves the right to change data and technical requirements without notice.
Contact us for more information.


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