To produce sandwich panels Alutech uses the galvanized steel tape 0,4 mm thick. It guarantees good reliability properties and durability of the door leaf.

The zinc coating 16 μm thick, as well as two-layer polymer coating 25 – 35 μm thick reliably protects the sandwich-panels surface against mechanical damage and precipitation exposure.

The front side of Alutech panel is covered with polyurethane coating modified by polyamide particles (PUR-PA). This coating:

• has a high resistance to scratches and notches in case of mechanical exposure;
• perfectly withstands temperature and humidity fluctuations;
• has high hardness and elasticity;
• has good anticorrosion properties;
• is resistant to detergents and chemicals.

The garage doors include components with excellent anticorrosion properties thus extending the life cycle of the doors:

• roller brackets and intermediary hinges made of stainless steel (Classic series);
• painted side plates and torsion springs;
• special set for premises with a high level of humidity.

Tests performed in the independent accredited laboratory, Republican Unitary Enterprise BelNIIS Institute (Minsk), proved that elements of Alutech door leaf withstood the exposure of salt fog for 750 hours. This corresponds approximately to 15 years of doors operation in coastal regions and such cities as Saint-Petersburg, Makhachkala, Murmansk, Arkhangelsk, Vladivostok, Magadan, Okhotsk, Novorossiysk, Sochi, etc.