End Cover TS143

The ALAKS TS143 Sliding Interlock Cap is an essential finishing component for thermal‑break sliding and Lift‑and‑Slide systems, designed to seal the hook profile ends. By effectively blocking air paths, it eliminates wind whistling and provides a seamless, professional aesthetic. Its use is critical in Lift‑and‑Slide systems, where maintaining superior airtightness and weather protection is vital for high‑performance operation.

This product has only one variant.

Description

TS143 Sliding End Cover

A Small But Essential Component for Perfect Performance of Sliding and Lift & Slide Thermal Break Systems

The TS143 system is one of the most advanced thermal break sliding series, available in both standard sliding and luxury lift & slide (Lift & Slide) variants. Especially in Lift & Slide models—where aesthetics, functionality, sash size, and weight transfer mechanisms demand the highest quality—every component must be precisely chosen, as even the smallest flaw in a single part can affect the entire system’s performance. One seemingly simple but truly critical part is the TS143 interlock end cap.

What is the TS143 Interlock End Cap and Why Is It Important?

In sliding systems, the point of engagement between two sashes features the central interlock profile. The ends of these profiles are typically open, creating channels for:
•   Wind
•   Dust
•   Noise Pollution
•   Insects
The Alaks TS143 interlock end cap is specifically designed to close these points. This component is mounted at the top and bottom ends of the interlock profile, and it:
•   Completely blocks air passage
•   Eliminates wind whistling
•   Gives a clean, professional appearance
•   Conceals technical parts and unsightly gaps
•   Enhances system sealing (water and air tightness)
In projects using the TS143 Lift & Slide system, beauty, quality, and sealing are even more crucial. Without this end cap, the product’s appearance is incomplete and overall system performance is downgraded.

The Role of TS143 Interlock End Cap in Lift & Slide Systems

Lift & Slide systems feature heavier sashes, whose movement is based on a lifting mechanism. Therefore:
•   Air pressure in the central zone is higher
•   Even the smallest gap causes noticeable whistling sounds
•   Airflow is more perceptible than in standard sliding windows
Thus, sealing the ends of the interlock profile with a standard cap is essential for proper system operation. The Alaks TS143 end cap—through precise mold design—completely fills the empty space, bringing the Lift & Slide system closer to international standards.

TS143 Interlock End Cap Features:

•   Custom design for TS143 profiles (standard and Lift & Slide)
•   Made from durable, engineering-grade plastic
•   Fast installation, perfectly fitted inside the profile
•   Prevents wind infiltration and whistling sound
•   Significant improvement in vertical sealing
•   Prevents exposure of internal cavities and profile parts
•   Enhances uniformity and aesthetics of the façade
•   Stable under environmental conditions: heat, cold, sunlight

FAQs:

1. Where exactly is the TS143 End Cap installed?

It’s fitted at the top and bottom ends of the interlock profiles (central hook profile), closing the open cross section. Secured with a 3.9mm self-tapping screw.

2. Is this cap compatible with TS143-style profiles from other brands?

If the profile’s mold and dimensions are an exact copy of the TS143 standard, yes, it can be used. However, since some manufacturers make minor changes, we recommend testing a sample or consulting our specialists before bulk purchase.

3. Does installing this end cap help reduce external noise?

Absolutely. Most noise pollution enters through open gaps in the interlock profile. Installing this cap blocks those pathways, significantly reducing sound infiltration.

4. Is this part only decorative or does it improve system performance?

Both. It enhances aesthetics by providing a complete look, and also blocks airflow and improves sealing and sound insulation.

If you want the TS143 system (especially the Lift & Slide version) to deliver maximum performance and aesthetic appeal, installing the Alaks TS143 interlock end cap is a necessary and professional choice. If you are looking for precise, durable, engineering-compliant hardware for aluminum window and door manufacturing projects, Alaks—top aluminum hardware manufacturer and the sole holder of the national standard mark—is your best partner. The Alaks technical team provides specialized engineering advice to guide you in selecting optimal hardware for hinged and thermal break projects, ensuring you receive compatible, standard, and long-lasting products.

📞 For purchasing aluminum door and window hardware, and for more information about our products as one of the largest manufacturers in the Middle East, please contact us via WhatsApp: +98 912 006 7165.