Introducing the Planet Drop Seals – Next-Level Sealing for Doors

We’re excited to announce that we are now able to supply the Planet drop seal range from Lorient — a breakthrough in door sealing performance for fire, smoke, acoustic and air-tightness applications.

Why this matters

The quality of the seal at the door bottom or around the door leaf is often an overlooked weak point in building envelopes. Gaps allow fire and smoke to travel, acoustic performance to suffer, and energy losses to escalate. Room for “better” in sealing solutions still exists.

The Planet drop seals are Swiss-engineered to close that gap (quite literally). These seals automatically drop into place when the door closes, forming a firm, continuous sealing barrier without relying on manual adjustments each time. According to Lorient:

“Planet drop seals provide effective solutions for acoustic, smoke, and fire containment across various door applications. Designed for use with timber, metal, PVC, and glass doors, these high-performance seals enhance comfort, safety, and energy efficiency.”
Further, they support hinged, sliding, folding and swing doors — giving real flexibility for modern building designs.

What makes them stand out

Here are some of the key features we believe specifiers, installers and building owners will appreciate:

• Ultra-slim & precision engineered: For example, the Planet US drop seal features an 8 mm width profile, making it perfect for minimal-profile doors while still delivering up to ±20 mm drop seal height and acoustic performance to ~44–48 dB.
• Versatile application range: The collection covers a very wide range of door types — mortised or face-fixed, for timber, metal, PVC or glass, exterior doors, sliding/stacking doors, even pivot doors.
• Tolerant of tough site conditions: Some models include optional bevel lip or gasket arrangements to handle uneven or sloping floors — crucial in retrofit or older building scenarios.
• Backed by a premium brand: The Planet brand has a long heritage (over 70 years) and is now distributed via Lorient in the UK, so you get the reliability of tested performance, technical support and supply chain assurance.

How Fire & Acoustic Seals can help you

We’re committed to making the specification and installation of high-performance seals as simple as possible. With Planet drop seals now in our portfolio:

• You can order direct from us — just email [email protected] or call 0121 521 2179 for pricing, availability and technical advice.
• We can provide technical support to help you choose the correct model for your door type, gap size, fire rating or acoustic requirement.

Ideal project scenarios

You’ll find Planet drop seals especially valuable in:

• Doors requiring high acoustic performance (conference rooms, hotels, theatres) where even small bottom gaps reduce sound insulation.
• High-spec commercial or residential buildings needing fire and smoke containment via a continuous door seal barrier.
• Doors with minimal visible profiles (slimline pivot or glazed doors) where the drop seal needs to be discreet.
• Retrofitting older doors or floors with uneven thresholds, where the bevel-lip options give more tolerance to installation variation.

Key specification tips

When selecting a Planet drop seal, keep these in mind:

1. Door type & material – timber, metal, glass, sliding vs swing. The Planet range covers each.
2. Gap/drop height needed – ensure the seal drop height meets the threshold gap under the closed door. Example: Planet US can accommodate ~20 mm drop.
3. Installation type – mortised vs face-fixed, depending on door construction and aesthetics.
4. Fire/smoke/acoustic requirements – check certification, acoustic dB ratings and suitability for fire doors.
5. Floor profile – if the floor slopes or is uneven, consider the bevel lip option for consistent contact.
6. Finish & aesthetics – many models have visible modules (roller, pivot), so finishes matter if in a public or high-design location.

In today’s demanding building environment — where fire safety, sound insulation, energy efficiency and visual design all matter — a high-performance drop seal is no longer an optional extra. The Planet drop seal range gives you a robust, proven, technically excellent solution.

We’re proud to bring this offering to our customers. If you’d like to discuss a project, specify a door seal upgrade, or simply receive a quotation, please contact us at [email protected] or call 0121 521 2179, and we’ll walk you through the options.

For more information, Download Brochure: HERE

Let’s seal the gap for good.
— The team at Fire & Acoustic Seals Ltd