Filoform to DuctSeal Conversion Table

Use this conversion table to map common Filoform / FiloSeal part codes to DuctSeal equivalents for procurement, maintenance, and specification conversions.

What engineers typically need from duct sealing

On site, you’re rarely sealing a neat laboratory setup. You’re sealing live cable ducts in chambers, cabinets and plant rooms where:

• cable quantities vary from drawing to reality
• heavy power cables sit alongside comms
• multiple services share a single bore
• ducts contain pipes within pipes
• installations have often evolved over time

That’s why modern raceway seals are increasingly specified as engineered, adaptable solutions—systems that can accommodate different duct sizes, varying cable fill, and mixed services within the same penetration.

DuctSeal as a practical alternative (MEKO-free and designed for re-entry)

Where many legacy products focus on one sealing approach, duct seal solutions in modern utility environments are expected to combine performance with repeatable installation. DuctSeal is designed as an engineered universal solution with easy installation and quick and easy installation in mind, particularly where easy re entry matters for upgrades.

MEKO-free formulation: DuctSeal is MEKO-free. This helps where restricted-substance policies and COSHH reviews are part of procurement, and where teams need to observe chemical resistance depending on the environment and exposure risks.

Re-enterability: why it matters

A common legacy requirement engineers search for is filoseal hd re enterable or enterable duct systems. The reason this phrase shows up so often in specifications is simple: ducts rarely stay “finished.” Networks evolve, routes get upgraded, and cable counts change. A re-enterable approach turns duct sealing from a one-time install into a maintainable asset—without forcing destructive breakout work every time the duct is accessed.

Re-enterability is a lifecycle advantage because it reduces the hidden costs that tend to appear after commissioning: callouts, downtime, access constraints, and repeat visits. On live infrastructure this matters even more, because “minor changes” are rarely minor once you factor in traffic management, permits, confined space procedures, and the knock-on effects of leaving a duct entry open.

In practice, re-enterability means you can carry out re entry operations, safely remove cables, add new services, and then reinstate the seal to the same standard—without chiselling out cured material or rebuilding the entire penetration. This is especially important where ducts include several cables, mixed sheath types (including pe sheathed cables) or where pipes are also present in one duct and the layout needs to remain organised.

Why re-enterability supports long-term performance

• Planned network expansion: changes in cable configuration can be accommodated without redesigning the duct entry.
• Maintenance and fault response: faster reinstatement without specialist demolition.
• Consistency across sites: re-enterable sealing systems reduce variability and incomplete reinstatement risk.
• Protects the penetration: avoiding destructive removal helps maintain integrity of the duct sealing system over time.

It also ties directly into performance requirements like water ingress control and maintaining a watertight seal. Every time a duct is opened and resealed using non-re-enterable methods, there’s an increased chance of voids, poor adhesion, or rushed reinstatement—particularly in wet conditions or where access is limited.

Chemical resistance and hazardous environments

On many sites, duct seals must withstand more than water. They may need chemical resistance and to be chemical agents resistant because chambers, pits, and plant rooms can expose materials to oils, alkaline water, or industrial gases.

If your environment includes flammable gases, ex zones, chlorine gas, methane, or hydrogen sulphide, selecting a seal that is resistant to hydrogen sulphide can be critical. Some projects also reference exposure to ASTM oil conditions or water alkaline chemical agents.

DuctSeal is supplied as a one component system designed as a flexible one component adhesive and adhesive and sealing compound in a single approach. In everyday terms, that means you’re working with one sealing compound that behaves like a plastic elastomer mass, offering water tightness excellent adhesion and durable bonding around common sheath types.

Water performance: watertightness, pressure and typical duct conditions

For many duct sealing jobs, the baseline requirement is a dependable watertight seal to prevent water ingress. Installations may be specified for low-pressure resistance such as 1 bar pressure (always confirm project conditions and duct state).

In practical terms, the system should deliver special qualities effectively sealing around irregular cable bundles, maintain water tightness excellent adhesion, and remain serviceable if you later need to alter the services.

Installation approach: bore holes, transit frames, kits and retrospective work

Duct sealing rarely happens in perfect new-build conditions. Many projects involve bore holes or existing penetrations that must be sealed after the fact, including seals installed retrospectively in chambers, walls, or existing duct entries.

Depending on the site, you may also be sealing through transit frames. A good solution should come as a complete kit so installers aren’t improvising on-site, and should support easy installation without specialist tooling.

DuctSeal is commonly installed using a component adhesive and sealing method (also referenced as component adhesive and sealing compound) where the same material provides both bonding and sealing behaviour.

Operational conditions: temperature and long-life performance

For engineering acceptance, check operating temperature limits and confirm the product remains stable over time in wet, contaminated, or chemically exposed environments.

Some projects reference compliance language such as WIMES compliant (where applicable to the project’s specification and documented evidence). Always match compliance claims to current documentation for the exact product and application.

Why teams switch from other sealing systems

In conversions from legacy specs, engineers often want a universal solution that works across duct conditions rather than relying on other sealing systems that are difficult to re-enter, inconsistent between crews, or not well-suited to mixed service penetrations.

The combination of easy re entry, predictable placement, and a single material approach can reduce rework and improve consistency.

Notes engineers sometimes search

You may see references such as nec articles 225.27 230.8 and combined strings like articles 225.27 230.8 300.5 or nec articles 225.27 230.8 300.5. You may also see notations like 225.27 230.8 300.5 g and 230.8 300.5 g 300.7. These strings can appear in legacy documentation and help confirm you’re looking at the right line item.

Summary: choosing the right duct seal for cables and pipes

If you’re converting an older specification, the key selection questions are straightforward. What is the duct size and condition of the duct? Are you sealing cable ducts with only cables, or pipes too? Are there chemical exposure risks requiring you to consider chemical resistance or a chemical agents resistant approach? Do you need future-proofing so you can remove cables or pipes and reinstate the seal without destructive work?

If your project requirements include re-enterability, reliable water performance, and stable sealing around common sheath types, DuctSeal is positioned as a practical, engineer-friendly alternative with quick and easy installation and long-life serviceability.

Related: DuctSeal LG | DuctSeal HG | DuctSeal FR

FAQs

What is the best filoseal alternative uk for cable ducts?

The best alternative depends on duct size, cable fill and whether you need heavy-duty or fire-rated performance. Start with the conversion table above and confirm duct condition, cable types and any chemical or hazardous area requirements.

Does a re-enterable duct sealing system help future upgrades?

Yes. Re-enterability supports maintenance and network expansion because it allows re entry works to remove cables, add services and reinstate the seal without destructive removal.

Do duct sealing systems need chemical resistance?

In many chambers and plant environments, chemical exposure can be a consideration. Always observe chemical resistance requirements where oils, alkaline water, or industrial gases may be present.