US-HF-002 Drop-Down Door Seal 930mm Aluminum Acoustic 44dB Double Adjustable

Product Overview

The Uszczelka opadająca 1712 alu. DL 930 mm (US-HF-002) is a drop-down door seal designed for threshold applications in wooden or PVC doors, including acoustic, smoke-control, and fire-rated doors. Its outer casing is made of aluminum for durability, while the sealing profile is crafted from black silicone to provide effective sealing. The gasket is suitable for installation in a 12x28.5 mm groove and offers an acoustic insulation value of 44 dB at a gap of 6 mm.

A distinguishing feature of this model is its dual adjustment capability: both the projection length and the angle of the seal can be tailored during installation. This adjustability ensures reliable performance across varying door and floor configurations, minimizing the risk of ineffective sealing and reducing on-site fitting issues. Facility managers and project contractors overseeing mixed door types will find this product particularly well-suited for retrofit and new-build projects in commercial or institutional buildings requiring certified sound or smoke control.

Key Features

• Drop-down mechanism ? automatic seal lowers when door closes for improved barrier against sound, smoke, and drafts


• Aluminum casing ? provides robust, corrosion-resistant protection for high-traffic installations


• Silicone sealing profile ? black silicone offers long-term elasticity and reliable contact with floors


• Acoustic insulation 44 dB ? tested at 6 mm gap to meet sound reduction requirements for office or hotel projects


• Double adjustment ? both seal projection and angle can be precisely set for optimal fit and function


• Fits 12x28.5 mm groove ? designed for standard mortise mounting in wooden and PVC doors


• Shortenable by up to 100 mm ? adaptable for doors of varying widths

Technical Specifications

• Seal Length: 930 mm


• Maximum Shortening: 100 mm


• Acoustic Insulation: 44 dB (at 6 mm gap)


• Sealing Height: up to 18 mm


• Groove Size Required: 12x28.5 mm


• Casing Material: Aluminum


• Sealing Material: Black Silicone


• Adjustment: Length and angle

Applications

Used in wooden and PVC doors within commercial, institutional, and residential buildings. Suitable for soundproof, smoke-control, and fire-rated doors requiring threshold sealing to achieve acoustic insulation up to 44 dB. Ideal for hotels, offices, schools, and healthcare environments where flexible drop-down seals are needed for certified protection.

Packaging & Shipping

Standard export packaging. Unit includes the drop-down seal and installation accessories for mortise mounting.