PLANET FT Drop-Down Threshold Seal 850mm Shortenable Acoustic 48dB Smoke Control

Product Overview

The PLANET FT drop-down threshold seal, with a length of 850 mm, is designed for professional installation in doors requiring enhanced smoke and acoustic insulation. Its silicone seal provides up to 48dB sound reduction and blocks smoke penetration, making it suitable for commercial and institutional settings where these requirements are critical. The seal features a 20 mm drop and can be shortened by up to 100 mm to accommodate various door widths.

A differentiating feature is the ability to shorten the strip by 100 mm, which enables precise adaptation for non-standard door widths in renovation or retrofit scenarios. This helps eliminate procurement risk for buyers managing diverse door inventories or irregular openings, ensuring fewer returns or installation issues. The PLANET FT is particularly recommended for bulk procurement by contractors working on office, hotel, or healthcare projects demanding acoustic and smoke-control compliance.

Key Features

• Sound insulation up to 48dB ? supports acoustic requirements for offices, hotels, and healthcare facilities


• Smoke-sealing function ? helps block smoke passing through gaps for improved safety


• Drop-down silicone seal ? extends up to 20 mm to cover floor gaps


• Length 850 mm ? suitable for standard or wider doors


• Shortenable by 100 mm ? can be cut down to 750 mm for adaptable installation


• Durable silicone gasket ? resistant to wear and maintains sealing performance


• Suitable for retrofit ? accommodates doors with existing irregular gaps

Technical Specifications

• Seal Type: Drop-down threshold seal


• Seal Material: Silicone


• Length: 850 mm


• Shortening Capability: Up to 100 mm (minimum 750 mm)


• Max Drop: 20 mm


• Acoustic Insulation: Up to 48dB


• Smoke Control: Yes

Applications

Used in commercial buildings, office spaces, hotels, hospitals, and other institutional facilities requiring acoustic and smoke-control door assemblies. Compatible with both new installations and retrofit projects, especially where doors have variable or non-standard widths. Effective for fire-rated, smoke-control, and soundproof door applications.

Packaging & Shipping

Standard export packaging. Each unit includes the threshold strip, silicone seal, and mounting accessories.