Sealing adhesive tapes

A technical sealing adhesive tape is designed to protect a sensitive area and limit the passage of moisture, air, dust, or certain external agents. Depending on its composition, it can also provide thermal, chemical, or electrical resistance. Its effectiveness depends on the substrate, the conditions of use, and the level of sealing required.

A sealing adhesive tape can be used to protect a joint, cover an exposed area, insulate a component, or reinforce an interface between two surfaces. Technical PTFE tapes are particularly suitable for industrial environments exposed to heat, chemicals, friction, or materials that may adhere to equipment.

The choice mainly depends on the surfaces involved, the temperature, the duration of exposure, and the external agents encountered. It is also important to consider any potential pressure, mechanical stresses, chemical resistance, and the level of adhesion required. A test under real conditions allows for verification of the solution's performance.

PTFE has a naturally non-stick surface, a low coefficient of friction, and good resistance to high temperatures and chemical agents. In the form of adhesive tape, it can protect a surface, facilitate sliding, limit the accumulation of residues, or isolate a technical area in a demanding industrial environment.

A silicone adhesive generally allows the tape to maintain its adhesion in demanding thermal conditions. It facilitates its application on different substrates and can offer good stability during heating cycles. However, the maximum temperature, duration of exposure, and compatibility with the surface must be checked for each product.

Not necessarily. The level of sealing depends on the material of the tape, the quality of the application, the condition of the surfaces, and the stresses applied to the assembly. A technical tape does not necessarily replace a gasket, sealant, or structural sealing solution when the application is subjected to significant pressure or prolonged immersion.

The surface must be clean, dry, smooth, and free from oils, dust, or old residues. The tape should be applied gradually with consistent pressure, without folds, bubbles, or non-adhesive areas. Overlaps and ends should be particularly well cared for to avoid creating weak points.

It is recommended to test the tape on a representative surface and under actual conditions of temperature, exposure, and stress. This test allows for checking adhesion, resistance, stability, and the level of protection achieved. DERFI can study the substrate and the process constraints to propose a suitable PTFE tape or technical solution.