End clients have an increasingly common request: they want roller blinds on their windows, but they refuse to drill into the frames or aluminum profiles, especially if they are PVC or thermally broken aluminum, as a bad drill hole can void the window manufacturer’s warranty. That is why we created our Kepler System.
As a professional, you know that installing with traditional adhesives used to mean trouble: plastic components falling off in the summer heat or systems that cause the fabric to skew.
In this technical guide, we break down the Kepler System, the ultimate solution designed for you to achieve a professional, robust installation in just 5 minutes, without ever touching a drill.
1. The Fixing Method: Components of the Kepler System
The number one mistake is confusing a technical system with a cheap DIY blind. The Kepler System consists of exactly four elements designed to work as a single cohesive unit:
-
Top Cassette: A compact profile that conceals the tube and operating mechanism.
-
2 Side Channels: Essential so that when the window is tilted, the fabric doesn’t hang loose due to gravity.
-
Fabric with Bottom Bar: The bottom weight bar maintains fabric tension.
-
Heavy-Duty Adhesive: Here lies the real secret. Both the cassette and the side channels come factory-fitted with high-performance double-sided tape specifically designed for glass and aluminum.
Rutperfil Technical Note: The adhesive works perfectly on PVC and lacquered materials, but keep in mind that it will not adhere to untreated wood or dirty, irregular surfaces. Additionally, the double-sided tape reaches its maximum bond strength after 72 hours.
2. Frame, Glazing Bead, or Glass? How to Install the Kepler System
The versatility of the Kepler System lies in its ability to adapt to almost any window extrusion. Depending on the depth and shape of the aluminum or PVC profile, you must choose the correct mounting position and measure with mathematical precision.
| Installation Type | Mounting Surface | Measurement Tip | Blackout Level |
| Frame Mount | On the outer perimeter of the window sash. | Ensure there is a flat surface of at least 1.5 cm between the handle and the glass. If the handle interferes, add 3 cm to the width and height of the central area. | Maximum. Provides the best blackout effect when closed. |
| Glazing Bead Mount | On the inner trim holding the glass. Only viable if the glazing bead is flat/square and at least 1.5 cm deep. | Measure the exact recess and deduct 0.1 cm from the width and 0.2 cm from the height to ensure the cassette fits perfectly. | Medium. Some light may bleed through the sides via the adhesive. |
| Glass Mount | Directly on the glass. Ideal for windows with highly rounded glazing beads. | Measure the glass surface clear of silicone or gaskets and deduct 0.1 cm from both the width and height. | Low. Light bleeds through the glass gaskets, especially the silicone ones. |
3. Aesthetic Integration: Colors that Blend In
A system bonded to the window sash must look like part of the window itself. To ensure seamless architectural integration, the Kepler System is available in the three dominant colors of the fenestration market:
-
White (For standard PVC).
-
Matte Black (For modern and industrial interiors).
-
Anodized Grey (The technical classic for aluminum).
4. Hardware Kits or Fully Assembled? Choose Your Profit Margin
At Rutperfil, we offer flexible supply options to maximize your profits according to your business model:
-
Hardware Format (For Workrooms): We supply the profiles (cassette, side channels, bottom bar, and mechanisms). You use your own fabric, assemble it on your cutting table, and maximize your gross margin.
-
Fully Assembled Format (For Quick Installers): We send you the made-to-measure Kepler System with the fabric already factory-installed. You just take it out of the box and install it.
Conclusion: The Value of 5 Minutes
Installing a standard roller blind requires marking, drilling, inserting wall plugs, and cleaning up dust. Estimated time: 25 minutes.
With the Kepler System, the process is radically different:
-
Clean the surface with a cleaning product (glass cleaner and a microfiber cloth) to remove grease.
-
Peel off the backing film, fit the pieces into place, and apply pressure along the cassette.
-
Hold with light pressure for one minute.
Do You Need a Window Shading Systems Supplier for Your Next Project? If you are looking for a supplier who understands your technical needs and shares your sustainability values, we are here to help. Our team is ready to advise you on the ideal blind system for your site.
📞 Call us: Contact our Technical Office directly at 937 50 85 45. 📧 Email us: Send your questions to info@rutperfil.com or rutperfil@rutperfil.com.
Additionally, we invite you to download our comprehensive shading systems catalog, where you can view our product specifications in detail. And if you want to keep reading about where our industry is heading, don’t miss our article on The Future of the B2B Sector as a Window Shading Systems Supplier.
You can also find our Kepler System with fabric below. If you simply want the fully assembled Kepler System with fabric, you can find it by clicking here.