About Us

Who we are, what we make and why we chose to do one thing as well as we can: invisible doors with hidden frames, made to order in any size.

Who we are

Sibstil Doors SRL is a Romanian company active since 2009 (Trade Register No. J32/358/2009, VAT No. RO25411699), with its registered office in Sibiu and a showroom in Bucharest. We operate the Kulttur brand, under which we supply premium interior doors, hardware and finishes. Over the years we have worked with private clients, architects and developers alike.

filomuro.store is our online store dedicated exclusively to filomuro doors — flush invisible doors with hidden frames that integrate into the wall and disappear from view when closed. We built a separate website for them because this type of door deserves more than a catalogue page: complete technical explanations, transparent prices and a configurator that calculates your exact cost before you even write to us.

What we do

We manufacture flush invisible doors with hidden frames, 100% made to order. We do not stock "standard" sizes: every door is produced for your exact wall opening, up to 3,500 mm high and 1,400 mm wide.

The range is deliberately simple — two models:

• Filomuro Minimal — unfinished invisible door, ready to be painted on site in the same finish as the wall. From 2,796 RON incl. VAT (approx. 549 €).
• Filomuro Signature — invisible door factory-painted in any RAL colour. From 3,693 RON incl. VAT (approx. 717 €).

You can see the exact price for your size instantly in the online configurator, without leaving any contact details.

What sets us apart

The filomuro market is full of products that look identical in photos. The differences are in the structure, where you cannot see them:

• Perimeter frame and hidden jamb made of extruded aluminium — not wood or HDF. Aluminium does not absorb moisture and does not warp over time, so the perimeter reveal stays constant for years.
• Dense mineral wool core — not honeycomb cardboard. You can hear the difference: real sound insulation and a solid feel when the door closes.
• Concealed hinges with 3D adjustment — invisible when the door is closed, they allow 180° opening and fine adjustment after installation.

A commitment to honesty: the properties above derive from the quality of the materials we use, not from an accredited certification of the assembled door. We would rather tell you exactly what we deliver than promise papers we do not have.

Our showroom in Bucharest

An invisible door has to be seen and touched to understand the difference between a mineral wool core and a cardboard one. We look forward to welcoming you at the Kulttur showroom:

• Address: Bulevardul Dacia 153-155, ground floor, Sector 2, Bucharest
• Opening hours: Monday to Friday 10:00–18:00, Saturday by appointment only
• Phone: +40 757 874 874
• Email: office@kulttur.ro

Our blog

We have published more than 26 technical guides about filomuro doors, in 5 languages — from the door core and concealed hinges to the total cost of installation and the most frequent mistakes on site. They are written by the same team that manufactures and installs the doors, not by a content agency. You can find them on the filomuro.store blog.