Technical Information


ZI-101 Metals

ZI-201 Polyethylene foam gasket (PE), White

ZI-202 Polyethylene foam gasket (PE), dark grey

ZI-203 Polyethylene foam gasket (PE) for MU overcollars, dark grey

ZI-204 Self-adhesive rubber edge molding (SKK) for access doors

ZI-206 Vitreous fibers gasket (GF)

ZI-207 Rockwool gasket (SW)

ZI-208 EPDM gasket, black

ZI-209 EPDM gasket for the insulated access doors IRD-2, -3, -4

ZI-210 Nitrile Butadiene Rubber (NBR)

ZI-211 Silikon-Dichtung (SI)

ZI-302 Isolation Hangers Rubber Parts

ZI-401 HD sealant

Chemicals and oils are available in very different qualities. Their properties vary depending on their concentration, operating temperatures, possible mix with other chemicals and the eventual presence of impurities. This is why gasket manufacturers only provide general information about the resistance of their products to various chemicals. It is therefore necessary to ask your suppliers of oils, solvents and other chemicals which materials (galvanized steel, stainless steel, etc.) and which gaskets (PE, EPDM, NBR, Silicone, etc.) they recommend. In view of the above it is also advisable that the client runs some tests in order to assess if the gaskets are suitable for the intended application. If you send us an inquiry or order, we assume that the above points have been clarified.

METU and the Norms

Norms from a METU perspective
or how our products fulfill their requirements.

Overview of some norms related to air-ducts and ventilation systems.

VDI 2087
Air ducts - Operating and construction fundamentals

VDI 3035
Production Sites / Metalworking Fluids

DIN EN 16798-3
Ventilation for Non-residential Buildings / Ductwork Air-tightness

DIN 4102-1
Fire behavior of building materials

VDI 6022
Hygiene requirements for air conditioning systems and devices

Acronyms and Abbreviations


Regulation No. 1907/2006 (REACH)

Paint Wetting Impairment Substances (PWIS)

RoHS Directive


Conflict Minerals

Various Technical Themes

Subjects related to air-ducts and which apply to various products

Properties of an ideal air-duct

Round vs Rectangular Air-ducts

Duct Tapes

Thermal Expansion

Unit Conversions

I always wondered ...

Simplified information intended for those who work in the HVAC industry but do not have to deal with the technical side of ventilation installations and who are not familiar with certain concepts.




The present additional information have been compiled carefully. They are only indications intended to provide counsel. They are the result of internal tests and information provided by our suppliers. There is no guarantee for completeness and accuracy. More precise information can only be made available through focused tests on a case by case basis. The provided indications do not discharge the user from conducting his own tests. Please make sure that the product is suitable for the intended use. Changes, errors and omissions excepted. Free translation: the German version prevails.