Double-Sided Adhesive Films

MH&W distributes Keratherm^® double-sided adhesive films from Kerafol^®, including popular series like KL90, KL91, and KL95. These ceramic-filled, thermally conductive, electrically isolating tapes deliver strong permanent bonding without mechanical fasteners—ideal for attaching heat sinks, CPUs, GPUs, BGAs, and other components to substrates or housings. With thermal conductivities around 1.4 W/mK (e.g., KL90), excellent insulation, and various thicknesses and custom die-cut options, they provide reliable heat transfer and long-term stability in demanding electronics applications.

Permanent Bonding Strength

These double-sided adhesive films deliver outstanding, long-lasting adhesion without the need for mechanical fasteners like screws or clips, securely attaching heat sinks, CPUs, GPUs, BGAs, and other components to substrates or housings for reliable, maintenance-free performance.

High Thermal Conductivity

Engineered with ceramic fillers and acrylic adhesive, Keratherm films achieve thermal conductivities up to 1.4 W/mK (e.g., KL90), enabling efficient heat transfer from hot components to heat sinks and significantly reducing operating temperatures.

Outstanding Electrical Insulation

With high dielectric breakdown strength (up to 20 kV/mm in models like KL90/KL91) and excellent volume resistivity, these films provide reliable electrical isolation, preventing short circuits while allowing effective thermal management in sensitive electronics.

No Pump Out or Dry-Out Over Time

Unlike thermal greases or pastes, Keratherm double-sided adhesive films maintain consistent performance throughout the device’s lifespan—they resist pump-out, migration, drying, or degradation, ensuring stable thermal contact and long-term reliability.

Easy Application & Clean Handling

Available as self-adhesive sheets, rolls, or custom die-cut parts, these lightweight, flexible films install quickly and cleanly with no mess, reducing assembly time, labor costs, and the risk of contamination compared to liquid alternatives.

Customizable & Versatile Options

Offered in various thicknesses (0.18–0.30 mm), configurations (with or without fiberglass reinforcement, e.g., KL91 for added durability), and material variations, Keratherm films suit diverse applications in computers, telecom, automotive electronics, and more—providing tailored solutions for specific thermal and mechanical needs.

Double-Sided Adhesive Film Comparison Chart

Film	Thermal Conductivity (W/mK)	Thermal Resistance (K/W)	Breakdown Voltage (kV)	Measured Thickness (mm)	Hardness (Shore A)	Possible Thicknesses (mm)	Fiberglass Reinforcement	Datasheet	View Product
KL 90	1.4	0.520	6.0	0.300	45	0.300 - 0.500	No	PDF	VIEW
KL 91	1.35	0.550	6.0	0.300	59	0.300	Yes	PDF	VIEW
KL 95	1.3	0.320	2.0	0.180	60	0.180	Yes	PDF	VIEW

Frequently Asked Questions

How do Keratherm® adhesive films compare to mechanical fasteners like screws or clips?

Keratherm^® double-sided films provide a permanent, high-strength bond that eliminates the need for mechanical hardware. This not only reduces assembly time and component weight but also ensures uniform pressure across the entire interface, avoiding the “bowing” effect often caused by centered screws which can create air gaps and reduce thermal efficiency.

Do these films require heat to activate the adhesive bond?

While Keratherm^® adhesive films are pressure-sensitive and will bond at room temperature, applying modest heat (approx. 60°C – 80°C) during the initial application can further lower the adhesive’s viscosity. This “wetting out” process allows the film to better fill microscopic surface irregularities, resulting in an even stronger mechanical bond and improved thermal contact.

Can these films provide electrical insulation while conducting heat?

Yes. Many Keratherm^® adhesive films are engineered with a fiberglass or polyimide reinforcement layer. This provides excellent dielectric strength and high breakdown voltage, ensuring that your heat sink remains electrically isolated from the live components even under high mechanical pressure.

What is the shelf life of Keratherm® Double-Sided Adhesive Films?

Because these are specialized technical adhesives, they typically have a shelf life of 6 to 12 months when stored in their original packaging in a cool, dry environment (ideally around 20°C). We recommend keeping the liners intact until the moment of application to prevent contamination from dust or oils.

Are these films repositionable during the assembly process?

These films feature a high-tack acrylic adhesive designed for permanent bonding. While they may allow for very slight adjustments immediately upon contact with low pressure, once full pressure is applied, the bond is considered permanent. For best results, we recommend using precision alignment jigs during high-volume assembly.

As thermal demands rise with miniaturization, MH&W’s Thermal Division provides the expertise and Keratherm® materials necessary to prevent system failure. Contact our engineers for technical support, request an RFQ, or purchase standard sheets directly from our online shop.