PLANET US-FH+RD Drop-Down Threshold Seal 47dB Toolless Fire and Smoke Door 710mm

Product Overview

The PLANET US-FH+RD drop-down threshold seal is designed for single and double-leaf fire-rated and smoke-control doors made of wood, PVC, steel, or for use with sliding doors. This Swiss-manufactured seal features an 8x30 mm aluminium profile containing a high-quality silicone gasket, providing acoustic insulation of up to 47 dB and ensuring compliance for demanding commercial and public sector environments.

A key differentiator is its toolless mounting method, allowing installation without removing the door leaf, which minimizes downtime and complexity during fit-out or retrofit projects. This feature is especially advantageous for contractors or facility managers responsible for maintaining operational continuity in hotels, hospitals, or office buildings requiring regular upgrades to smoke and sound insulation.

Key Features

• Drop-down seal stroke up to 20 mm ? allows reliable sealing of gaps in uneven floors or high-clearance thresholds


• Acoustic insulation 47 dB ? supports soundproofing requirements for commercial, hospitality, or healthcare use


• No door removal for installation ? mountable with door in place, streamlining refurbishment or rapid project schedules


• Compatible with smoke-control doors ? suited to certified fire and smoke compartmentation solutions


• High-grade silicone gasket ? durable sealing, maintains flexibility and performance through temperature shifts


• Profile size 8x30 mm ? compact for retrofitting where clearance is limited


• Cuttable seal ? can be trimmed by up to 125 mm onsite to fit various door widths

Technical Specifications

• Seal Stroke: Up to 20 mm


• Acoustic Insulation: 47 dB


• Profile Dimensions: 8x30 mm


• Profile Material: Aluminium


• Gasket Material: High-quality silicone


• Cuttable Length: Up to 125 mm


• Includes: Stainless steel mounting elements, 20x20 mm plate, fixing screws, adjustment key


• Country of Manufacture: Switzerland


• Compatible Door Materials: Wood, PVC, steel


• Suitable For: Single, double-leaf, and sliding doors

Applications

Intended for installation in fire-rated and smoke-control doors in commercial, hospitality, healthcare, and institutional environments. Suitable for doors constructed from wood, PVC or steel, as well as sliding door systems. Used where acoustic, smoke, and air insulation are required, including offices, hotels, hospitals, and public buildings.

Packaging & Shipping

Standard export packaging. Each unit includes the drop-down seal (pre-assembled), stainless steel mounting accessories, 20x20 mm mounting plate, adjustment key, and installation instructions.