Internorm I-tec Glazing System: Redefining Window Technology

Windows are a crucial part of any building structure, serving as a connection between the indoor environment and the outside world. They let in light, provide views, and enable ventilation, but they also need to withstand varying weather conditions and protect against drafts and leaks. This is where Internorm’s EPDM weather seals and gaskets come into play, enhancing air and water tightness in European windows.

Understanding the Role of Weather Seals and Gaskets

Weather seals and gaskets are essential components of a window, ensuring a tight seal between the window sash and frame. This seal prevents air leaks and water infiltration, contributing to the overall energy efficiency and comfort of your home1. In addition, it can significantly reduce noise transmission, providing better acoustic insulation.

The Internorm Advantage: EPDM Weather Seals and Gaskets

Internorm, a leading European window manufacturer, utilizes high-quality EPDM (ethylene propylene diene monomer rubber) for their weather seals and gaskets. EPDM is known for its excellent heat, UV, and weather resistance, making it an ideal material for use in window seals and gaskets2.

So, how exactly do these EPDM weather seals and gaskets contribute to enhancing the performance of Internorm windows?

Superior Air Tightness

Internorm windows, equipped with EPDM seals, excel in air tightness, preventing unwanted drafts and heat loss. This is particularly beneficial in colder climates where heat conservation is essential. With these seals, Internorm windows achieve airtightness class 4, according to EN 1026/122073, indicating minimal air leakage.

Excellent Water Tightness

EPDM gaskets in Internorm windows also provide superior water tightness, preventing rain or moisture from seeping into your home. These windows achieve up to Class E1050 (EN 1027/12208), which means they can resist water penetration under a pressure of 1050 Pa4.

Long-Term Durability

The weather-resistant properties of EPDM ensure that Internorm’s seals and gaskets maintain their performance over time, even under harsh weather conditions. This longevity means less frequent replacement, adding to the cost-effectiveness of these windows.


Internorm’s use of EPDM weather seals and gaskets in their windows reflects their commitment to quality and performance. These elements not only enhance the air and water tightness of windows but also contribute to their durability and energy efficiency. For homeowners seeking high-performance windows that offer superior protection against the elements, Internorm’s offerings serve as an excellent choice.