Drop-down thresholds are ideal for situations where traditional threshold solutions are insufficient. They allow doors to be sealed while maintaining the comfort and safety of a completely barrier-free threshold.
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Aline drop-down thresholds are a line of thresholds designed for universal use in PVC, wood, aluminum, and steel doors. They combine high tightness, durability, and comfort of use with simple installation and an elegant finish. The thresholds are designed to fill the gap between the bottom of the door and the floor or threshold plate. The seal is operated automatically by pressure on the door frame on its adjustable activation mechanism. The mechanism reacts when the door is opened. The thresholds are suitable for new and existing doors. They prevent noise/sound transmission, drafts, heat loss, and light loss through the gap at the bottom of the door. It is a key element of the door sealing system.
suitable for wood, aluminum, PVC, and steel
height 0.0 mm
sound insulation up to Rw 52 dB
Alumaster (Glassline) drop-down thresholds for glass doors are ready-made, easy-to-install premium systems that combine tightness, acoustics, and aesthetics in apartments, offices, and commercial investments. One family offers a wide range of solutions – from variants with enhanced acoustics and delayed sealing technology to models mounted directly on the edge of the glass – so that the product can be precisely matched to the function of the door and the installation conditions. The systems are non-invasive to install (no drilling, tape-mounted), fit 8–14 mm thick glass and are available in elegant finishes: anodized silver, stainless steel, matte black or champagne. Certified acoustic parameters reach up to Rw = 50 dB, which significantly increases user comfort and reduces drafts, dust, and noise.
SEE: instructions, catalogs
material - aluminum, silicone, or TPE
sound insulation up to Rw 44 dB
for glass panes with a thickness of 8 to 14 mm
Drop-down thresholds for sliding doors are an aesthetic, certified solution that ensures effective sealing at the floor and quiet closing thanks to a light activation mechanism <12 N. After closing the door, the piston retracts into the profile, eliminating the gap between the door leaf and the frame and improving acoustics up to 42 dB Rw. The system is available in two compact cross-sections (13×28 mm and 12.8×20 mm). Installation is quick and flexible — choose between adhesive tape or screw-on versions.
SEE: instructions, catalogs
for wooden, PVC, aluminum, and glass doors
the seal activates at a force of less than 12 newtons
sound insulation up to 42 dB Rw
Alumaster IDROZERO is a comprehensive threshold sealing system, perfectly suited to various types of doors – PVC, wooden, and anti-burglary. Thanks to the innovative design of the drop-down seal combined with a wind barrier, it ensures barrier-free passage and effective protection against water, extreme weather conditions, and noise.
Chronosoft and Chronoclick are a line of drop-down seals with a patented hydraulic drop system that only extends after the door is fully closed—without rubbing against the floor and without noise. The ideal solution for exterior and interior doors, protecting all types of flooring (including carpets) and ensuring even pressure across the entire width.
Chronosoft – a seal that drops a few seconds after the door is closed, softly and silently. The result: no friction, no noise, less wear and tear. The ideal solution where comfort and acoustics are important.
Chronoclick – an alternative with a more decisive action. The seal does not drop immediately, but closes after a moment with a snap (you can hear a “click”). The result: a reliable solution for doors where safety and tightness are a priority.
READ: instructions, catalogs
dedicated to wood and steel
height 0.0 mm
sound insulation up to Rw 51,5 dB
With our warehouse located in central Poland and large stock levels, we fulfill orders on time, even within 48 hours. We minimize production downtime thanks to the constant availability of key components.
We will prepare an “all-in-one package” for you – complete threshold systems, window fittings, and other necessary components. Everything you need for woodwork production in a single delivery.
We will help you choose the perfect solutions for your production, including non-standard ones. We will conduct an audit, provide instructions, and share our experience—at no additional cost.
We will provide you with solutions that ensure permanent tightness without the need for milling and installation barriers. We will help you choose certified systems that comply with the requirements of premium, passive, and renovation construction. This will reduce the number of complaints, improve the quality of installation, and increase customer satisfaction. We will help you choose the perfect solutions for your production, including non-standard ones. We will conduct an audit, provide instructions, and share our experience at no additional cost.
Uncompromising tightness – solutions ensuring permanent tightness without the need for milling or creating architectural barriers. We provide certificates for watertightness, acoustics, and passive house.
We deliver on time and according to the order.
Products undergo rigorous quality control
Trust translates into long-term cooperation
Proven effectiveness in practice by thousands of entrepreneurs
By joining our B2B platform, you have all your products and documents in one place – faster, more convenient, and always up to date.
Quick access to the full range – always with up-to-date prices and specifications
Easier purchase management – organize orders and documents in one panel
Repeat orders in just a few clicks – save time in your daily work
Simple document management – invoices, statuses, and cooperation history always at your fingertips
From the initial order to installation and ongoing service – we show you what happens next, step by step.
You are purchasing a product
You choose the solution that suits your project
Order verification
We check that the order is complete and well secured.
We ship
We deliver your order quickly, within 48 hours
We provide on-site support
We check the correctness of the installation and provide practical tips.
You choose the solution that suits your project
We check that the order is complete and well secured.
We deliver your order quickly, within 48 hours
We check the correctness of the installation and provide practical tips.
You receive support from experts who will help you choose the best solution for your project.
We will provide a complete set of materials to ensure smooth installation and operation.
We provide your team with practical knowledge so that they can act confidently and independently.
We check the correctness of implementation on site to ensure that everything is working according to plan.
We respond within 24 hours on business days. By email or phone, whichever is more convenient for you.
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We support designers in creating safe, comfortable, and visually consistent spaces.
Our low thresholds, interior products, and minimalist forms fit in with modern standards of aesthetics and functionality—without barriers and without technological compromises, increasing the usability of any space.
Właściciel firmy X
I recommend them, excellent contact, very friendly, competent service. Everything exactly as it should be. Thank you and see you soon.
Właściciel firmy X
I must say that the service at this company/customer contact – at a very high level – helped identify the damaged fitting, found it in stock, and organized shipping very quickly. I am extremely satisfied.
Właściciel firmy X
What does the implementation process for your production solutions look like? The implementation process is simple, transparent, and fully tailored to your technology. We start with a free technical consultation, during which we learn about your needs, the type of joinery, and production requirements. Based on this, we propose the best solution – dedicated to each PVC, ALU, wood, and steel joinery system. We then provide a complete set of materials: technical documentation, assembly diagrams, and implementation instructions. If you need it, we also offer:
What does the process of implementing your solutions into production look like?
The implementation process is simple, transparent, and fully tailored to your technology. We start with a free technical consultation, during which we learn about your needs, the type of joinery, and production requirements. Based on this, we propose the best solution – dedicated to each PVC, ALU, wood, and steel joinery system.
We then provide a complete set of materials: technical documentation, assembly diagrams, and implementation instructions. If you need it, we also offer:
What does the process of implementing your solutions into production look like?
The implementation process is simple, transparent, and fully tailored to your technology. We start with a free technical consultation, during which we learn about your needs, the type of joinery, and production requirements. Based on this, we propose the best solution – dedicated to each PVC, ALU, wood, and steel joinery system.
We then provide a complete set of materials: technical documentation, assembly diagrams, and implementation instructions. If you need it, we also offer:
What does the process of implementing your solutions into production look like?
The implementation process is simple, transparent, and fully tailored to your technology. We start with a free technical consultation, during which we learn about your needs, the type of joinery, and production requirements. Based on this, we propose the best solution – dedicated to each PVC, ALU, wood, and steel joinery system.
We then provide a complete set of materials: technical documentation, assembly diagrams, and implementation instructions. If you need it, we also offer:
What does the process of implementing your solutions into production look like?
The implementation process is simple, transparent, and fully tailored to your technology. We start with a free technical consultation, during which we learn about your needs, the type of joinery, and production requirements. Based on this, we propose the best solution – dedicated to each PVC, ALU, wood, and steel joinery system.
We then provide a complete set of materials: technical documentation, assembly diagrams, and implementation instructions. If you need it, we also offer:
What does the process of implementing your solutions into production look like?
The implementation process is simple, transparent, and fully tailored to your technology. We start with a free technical consultation, during which we learn about your needs, the type of joinery, and production requirements. Based on this, we propose the best solution – dedicated to each PVC, ALU, wood, and steel joinery system.
We then provide a complete set of materials: technical documentation, assembly diagrams, and implementation instructions. If you need it, we also offer:
What does the process of implementing your solutions into production look like?
The implementation process is simple, transparent, and fully tailored to your technology. We start with a free technical consultation, during which we learn about your needs, the type of joinery, and production requirements. Based on this, we propose the best solution – dedicated to each PVC, ALU, wood, and steel joinery system.
We then provide a complete set of materials: technical documentation, assembly diagrams, and implementation instructions. If you need it, we also offer:
What does the process of implementing your solutions into production look like?
The implementation process is simple, transparent, and fully tailored to your technology. We start with a free technical consultation, during which we learn about your needs, the type of joinery, and production requirements. Based on this, we propose the best solution – dedicated to each PVC, ALU, wood, and steel joinery system.
We then provide a complete set of materials: technical documentation, assembly diagrams, and implementation instructions. If you need it, we also offer:
