The MB-Slimline window system is a versatile solution designed to realize various types of inward-opening windows, such as casement, tilt, tilt-and-turn and fixed windows.

MB-Slimline is also an excellent choice in terms of thermal and acoustic insulation. The system achieves a heat transfer coefficient Uw of 0.8 W/(m²K) and Uf of the frame of 1.84 W/(m²K), which guarantees high energy efficiency. With extensive glazing options that allow the installation of glass up to 81 mm thick, MB-Slimline provides flexibility in the choice of thermal insulation and security parameters. In addition, the system offers excellent airtightness performance, including Class 4 air permeability and Class E1500 watertightness, highlighting its high quality and reliability in harsh weather conditions.

Features of the MB-SLIMLINE window profile

mb slimline zamkniete

Water resistance

Class E 1500, EN 1027:2001; EN 12208:2001

Air permeability

Class 4, EN 1026:2001; EN 12207:2001



Uw from 0.8 W/(m2K)



2 years warranty on fittings as standard, 5 years on profile


Exceptionally slender aluminum profiles visible from the outside, allowing MB-Slimline to create elegant and modern structures that perfectly fit the aesthetics of modern buildings. The MB-Slimline system is available in two main variants: with visible profiles, which offer a traditional, distinctive window appearance, and with invisible profiles (SG), which give the windows a modern, minimalist character that fits perfectly with contemporary architectural trends. With the ability to easily replace old steel windows with the MB-Slimline system, users can enjoy a significant improvement in thermal insulation and a modern look while maintaining the aesthetics of the original structures.

* Parameters given for the warm frame used.

Colors of MB-SLIMLINE windows

Colour palette

Glass catalogue

Product Catalogue

MB-SLIMLINE standard:


Locking point
every 750 mm

okucia wielopunktowe

Multipoint fittings


Dublin handle

What do we offer in addition to the MB-SLIMLINE system?


e.Volution 70 AD

Hidden hinges up to 3m

narożne przeszklenia

Corner glazing

smart home tablet

Smart home

The presented photos are for reference only. Due to the display technique and the conditions of taking photos, the actual appearance of the products, including their color, structure may differ from that presented on the website. The content of the website is informative and does not constitute an offer within the meaning of the Civil Code. Due to the continuous improvement of products, the information presented on this website may change.

See also

mb 45

MB 45


MB 70


MB 86


MB 86N