
With HYFI-TECH, ISO-Chemie presents a smart hybrid technology that integrates foil firewalls directly into the sealing tape. The pioneering HYFI technology combines the high air and driving rain tightness of foil technology with the reliable flexibility and movement absorption capacity of high-quality PUR soft foam.
The result: high-performance, intelligent, and future-oriented sealing products for safe, durable, and energy-efficient building sealing.
The current Building Energy Act (GEG) and the EU Buildings Directive (EPBD) require permanently airtight building envelopes, with the EPBD even making zero-emission buildings the standard for new buildings. This goal cannot be achieved without high-performance joint sealing systems, as significant heat loss occurs through leaky connection points in the facade.
At the same time, product standard DIN 18542:2020 defines high minimum requirements for multifunctional tapes in stress groups MF1 and MF2. According to this standard, multifunctional tapes must reliably guarantee their promised values for driving rain and air tightness even at the largest joint width and smallest cut width.
Untight joints cause up to 40% heat loss and significantly increase heating energy requirements. In addition, leaks and seepage promote the formation of condensation and the infiltration of rainwater, which can result in moisture damage and mold. Furthermore, there is a risk of costly repairs due to warranty claims and the loss of subsidies.

HYFI technology sets new standards in joint sealing with multi-layer foil firewalls that are integrated directly into the sealing tape – without any separate bonding. This means there are no gaps, no installation errors, and no weak points in the building envelope. The best thing about it is that there is no need to change the installation procedure. The new HYFI-TECH multifunctional tapes are installed in exactly the same way as the previous materials. This saves considerable conversion time and queries and ensures high installation quality.
HYFI-TECH not only meets current standard requirements, but exceeds them – with tested system tightness and proven outstanding performance.
Our modern HYFI technology allows us to confidently meet and exceed the requirements of future modern construction. Hybrid HYFI technology integrates multi-layer foil barrier layers directly into the PUR sealing tape. HYFI-TECH thus combines the quality features of high-quality connection foils with the advantages of modern joint sealing tapes – for maximum protection of the building connection joint.

Our products developed with HYFI technology are suitable for modern new buildings as well as for energy-efficient renovations of old buildings, for modular construction, system construction, and the serial renovation of buildings—anywhere where airtightness, driving rain resistance, and permanent movement absorption play an important role in construction joints.

MF1-TESTED MULTIFUNCTIONAL TAPE 4.0 WITH INTERNAL FOIL MEMBRANES.
For premium connections, exposed locations, ambitious energy targets!
* In tested joint dimensions according to test certificate