DuctSeal LG Cable Duct Sealing System

Revolutionary Cable Support System
Unique backing design provides enhanced cable stability, reducing strain and movement within the duct.

Safe, MEKO-Free Formulation
Our advanced FyBrid sealing compound is non-hazardous, halogen-free, and environmentally friendly, delivering a secure and safe seal without harmful emissions.

High Pressure Resistance
Engineered for robust performance with proven sealing capability of up to 1.0 bar, suitable for a wide range of underground and pressurised environments.

Chemical Resistance for Utilities
Tested and effective against methane, chlorine, and hydrogen sulphide, making it ideal for water industry infrastructure and utility networks.

Hydrocarbon Protection
Suitable for petrol forecourts, fuel distribution sites, and other hydrocarbon-exposed environments, offering durable sealing performance.

Full Compliance with Industry Standards
Meets or exceeds DSEAR, WIMES, DCG, APEA Blue Book, and ATEX requirements for safety and performance.

Enhanced Hygiene Protection
Formulated to resist bacterial and fungal growth, ensuring long-term reliability in damp or contaminated ducts.

Minimal Cable De-Rating
With a 20mm seal thickness, thermal resistance is just 5.1 K/W, allowing cables to retain their full current-carrying capacity.

Watertight Barrier Protection
Prevents water ingress and protects against cable degradation and water treeing, extending cable lifespan.

British Made Quality
Proudly designed, developed, and manufactured in the UK, ensuring excellent adhesion, durability, and consistent performance.

Fast & Simple Installation
Designed for quick application in multiple cable scenarios, without the need for special tools.

One Kit Per Duct
Each kit includes all components required to seal one duct, based on the kit size selected.

Note: A standard caulking gun is required (not included but available separately). Depending on the cable fill percentage, one kit may seal more than one duct. For advice, contact our technical team on +44 (0)161 874 1480.

Cable Separation & Support
Correct separation is essential for performance. The patent-pending tubular rubber backing system can be configured in continuous strips, rings, or cross-shapes to provide support and separation for large single-core, trefoil, or triplex cables. This ensures safe spacing, prevents movement, and guarantees DSEAR-compliant trefoil sealing.

Running Water Conditions
For best results, ducts and cables must be dry and free from running water. Clean surfaces of all dirt, oil, and grease before applying GreyStuff or RedStuff. If running water is present, please call +44 (0)161 874 1480 for technical advice. In most cases, we recommend using a Kraso Mechanical Seal.

Cure Time
GreyStuff and RedStuff cure at approximately 3–4mm per day, depending on humidity and temperature. Higher humidity and warmer conditions accelerate curing.

Minimum seal depth: 20mm for effective performance.

Cleaning
Uncured material can be removed using solvent-based wipes. Once cured, the compound must be removed mechanically.

Health & Safety
Both GreyStuff and RedStuff are based on a neutral curing, MEKO-free system, making them non-hazardous and installer-safe during application.

Compliance      
DuctSeal LG is fully compliant with:

• WIMES (Water Industry Mechanical & Electrical Specifications)
• APEA Blue Book (petrol forecourts)
• ATEX & DSEAR (explosive atmospheres)
• DCG (Ducted Cable Guidance)
• Sewers for Adoption
• Network Rail PADS

Re-Entry & Removal
Once cured, the compound has a hardness similar to a rubber eraser. This allows ducts to be re-entered or resealed when required.

Always use sharp tools on de-energised cables. AC Cable Solutions accepts no responsibility for damage caused during re-entry.

Cable Suitability
GreyStuff and RedStuff are solvent-free, single-component systems that do not damage cable sheaths or stain duct surfaces.

Storage & Shelf Life
Store in a cool, dry location away from direct sunlight.

Shelf Life: 12 months unopened
After opening: reseal tightly and use within 1 month.

What makes DuctSeal LG different from other duct sealing systems?
DuctSeal LG combines unique daisy-chained circular foam backings with a flexible, intumescent, MEKO-free sealing compound (GreyStuff). This design delivers superior stability, prevents cable movement, and ensures long-lasting resistance against water ingress, toxic gases (methane, chlorine, hydrogen sulphide), hydrocarbons, and microbial attack. It is also fully compliant with WIMES, ATEX, DSEAR, and APEA standards, making it one of the safest and most reliable duct sealing solutions available.

Is DuctSeal LG safe to use in all environments?
Yes. DuctSeal LG is non-hazardous, halogen-free, and MEKO-free, ensuring safe installation in sensitive environments such as water treatment plants, data centres, telecom networks, petrol forecourts, and industrial facilities.

Can DuctSeal LG be used for retrofitting existing installations?
Absolutely. DuctSeal LG is a re-enterable duct sealing system, which means it can be installed during new projects or retrofitted into existing ducts. Future re-entry for cable upgrades or maintenance is straightforward and safe.

Is DuctSeal LG WIMES compliant?
Yes. DuctSeal LG complies with WIMES 3.02 (2019), clause 6.4.3.2(d), and is approved for use by all UK and Irish water authorities.

Can DuctSeal LG withstand chemicals and hydrocarbons?
Yes. DuctSeal LG is designed to resist a wide range of aggressive agents, including methane, chlorine, hydrogen sulphide, and hydrocarbons. This makes it suitable for petrol forecourts, wastewater plants, sewage pumping stations, and industrial sites.

How much pressure can DuctSeal LG withstand?
When installed correctly, DuctSeal LG achieves a gas- and water-tight seal up to 1.0 bar pressure, providing strong protection even in challenging environments.

How long does DuctSeal LG take to cure?
Cure rate is approximately 3–4mm per day, depending on humidity and temperature. A minimum of 20mm seal depth is required for full performance.

Does DuctSeal LG reduce cable performance?
No. At a 20mm seal depth, the thermal resistance is just 5.1 K/W, which means minimal cable de-rating and no loss of current-carrying capacity

How long will the seal last?
DuctSeal LG is designed for long-term durability in harsh underground and industrial conditions. With correct installation, it provides decades of service life, protecting cables against water treeing, chemical ingress, and environmental degradation.

Why choose AC Cable Solutions?
AC Cable Solutions is the exclusive UK & Ireland distributor of KRASO GmbH and the manufacturer of the GreyStuff & RedStuff sealing compound. All products are British made, rigorously tested, and compliant with international standards, ensuring the highest level of safety and performance. Our dedicated support team provides technical advice, training, and next-day delivery to keep your projects moving.