DuctSeal LG Cable Duct Sealing System (cables <25mm Ø) - ≤1 Bar Pressure Resistance
Description
Introducing the New DuctSeal LG (Water & Gas) Re-enterable Duct Sealing System
The DuctSeal LG Cable Duct Sealing System is a revolutionary, re-enterable solution to seal cables and pipes within ducted networks. This advanced system is precisely engineered to protect against the ingress of harmful or flammable gases, liquids, smoke, and vermin, ensuring the safety and integrity of your installations. Whether in the water industry, petrol forecourts, or telecommunications, DuctSeal LG is the ultimate choice for reliable duct sealing.
Key Features
Key Features of the DuctSeal LG Cable Duct Sealing System
- Revolutionary Circular Foam Backing System: Our unique daisy-chained circular foam tubes quickly wrap and separate cables, ensuring limited movement and enhancing the seal's effectiveness.
- MEKO-Free, Fybrid, Non-Hazardous Intumescent Sealant: The GreyStuff & RedStuff sealant is a superior, single-component, neutral curing adhesive that is both flexible and robust, perfect for harsh environments.
- Water & Gas Tight: It provides a 1.0 bar pressure-resistant barrier against water and gas, making it ideal for various industrial applications.
- Resistant to Toxic Gases: Perfectly suited for the water industry, the system resists gases like methane, chlorine, and hydrogen sulfide.
- Resists Hydrocarbons: Designed to withstand exposure to hydrocarbons, it is an excellent choice for petrol forecourt installations.
- Flame Retardant: Tested to UL94: 2013 ANSI / UL 94: 2018 standards, ensuring high levels of flame retardance.
- DSEAR, WIMES, DCG, APEA, BLUE BOOK & ATEX Compliant: Fully compliant with essential industry standards and regulations.
- Microbial Defence: Enhanced to resist fungi and bacteria, ensuring long-lasting protection in challenging environments.
- Non-Adiabatic: Minimal Cable De-Rating: At a thickness of 20mm, thermal resistance is just 5.1 K/W, preserving the cable’s full current-carrying capacity.
- MADE IN UK: The DuctSeal LG system's components are proudly designed and manufactured in the UK, guaranteeing top-quality materials and craftsmanship.
Certification
Fire certification
Important Note: A fire rating is applicable only to an "as fire tested" system or an otherwise approved configuration. The entire system or configuration achieves the described fire rating only when a specific proprietary brand of product is installed in an identical manner to the approved tested configuration. Always ensure that your installation matches our fire test certification. It is the end user's responsibility to verify that DuctSeal FR is the correct system for the project requirements. Please contact our technical department to request a copy of our test report, and refer to our Duct Sealing Disclaimer.
GreyStuff or RedStuff Fire Resistance
GreyStuff sealant was tested according to BS EN 1366-3:2021+A1:2024. RedStuff has not been tested, but can be used with your authorisation only (customer and/or end user). We can confirm that the difference between GreyStuff and RedStuff is less than <1%. The only change in the formulation from GreyStuff to RedStuff is the pigment component. This alteration does not affect the fire resistance, physical properties, or manual handling of the final product.
Air Quality Certification
GreyStuff has achieved Indoor Air Comfort GOLD for ultra-low VOC emissions. This confirms compliance with strict European indoor air quality requirements, including BREEAM Exemplary Level, EMICODE EC1 Plus, French A+ and EU Taxonomy criteria.
Electrostatic Properties
GreyStuff has been independently tested to assess its electrostatic behaviour in accordance with recognised industry standards for electrical insulation and static charge performance.
Testing was conducted to:
- BS EN 60079-32-2 / IEC 60079-32-1 (Surface Resistivity – electrostatic hazards guidance)
- BS EN 61340-2-3 (Volume Resistivity – resistance through material)
Test Results
- Surface Resistivity: > 2.0 × 10¹³ Ω/sq (at 25% RH)
- Volume Resistivity: > 1.7 × 10¹² Ω·m
Air Quality & Zero MEKO
Indoor Air Comfort GOLD and Zero MEKO Duct Sealing System
DuctSeal LG uses GreyStuff, an independently tested sealant that has achieved Indoor Air Comfort GOLD for ultra-low VOC emissions. This demonstrates compliance with some of the most demanding European indoor air quality requirements, including BREEAM Exemplary Level, EMICODE EC1 Plus, French A+ and EU Taxonomy criteria.
For AC Cable Solutions, installer safety and product performance go hand in hand. DuctSeal LG is often used in enclosed or restricted environments such as utility chambers, plant rooms, service risers, substations and ducted cable networks. Using a low-emission, zero MEKO duct sealing system helps support cleaner air during and after installation.
What Indoor Air Comfort GOLD Means
Indoor Air Comfort GOLD is a recognised certification for low-emission construction products. It confirms that GreyStuff has been independently assessed for very low VOC emissions, supporting projects where indoor air quality, sustainability and responsible product selection are important.
For engineers, contractors and specifiers, this gives added confidence that DuctSeal LG delivers strong sealing performance while supporting modern environmental and air quality standards.
Why Zero MEKO Matters
GreyStuff is formulated with zero MEKO. MEKO, also known as 2-butanone oxime, is used in some traditional sealants and may be released during the curing process.
By avoiding MEKO-based curing chemistry, GreyStuff helps reduce unnecessary chemical exposure for engineers and installers working close to the product. This is especially important when sealants are applied by hand in ducts, chambers and other confined or poorly ventilated areas.
Benefits for Engineers and Installers
- Indoor Air Comfort GOLD: Independently tested for ultra-low VOC emissions and strict indoor air quality standards.
- Zero MEKO formulation: Helps reduce exposure to MEKO-related curing emissions compared with traditional MEKO-containing sealants.
- Cleaner installation environment: Supports improved air quality in chambers, plant rooms, substations, risers and ducted cable networks.
- Responsible product choice: Supports contractors and engineers who regularly apply duct sealants by hand.
- Low-emission project suitability: Suitable for specifications where BREEAM, EMICODE EC1 Plus, French A+, EU Taxonomy and VOC requirements are important.
- No compromise on performance: DuctSeal LG remains re-enterable, flexible, water and gas tight, while supporting a cleaner working environment.
A Cleaner Choice from AC Cable Solutions
DuctSeal LG is designed to protect cable ducts from water, gas, smoke, vermin and harsh industrial environments. With Indoor Air Comfort GOLD and zero MEKO GreyStuff, it supports both reliable duct protection and a cleaner, more responsible installation environment for the people applying it.
FAQs
What makes DuctSeal LG different from other sealing systems?
DuctSeal LG stands out due to its innovative circular foam backing, flexible intumescent sealant, and superior resistance to toxic gases, hydrocarbons, and microbial threats. It is also fully compliant with essential industry standards, non-hazardous, and doesn't contain 2 butanone oxime (MEKO), making it the best choice for safe & critical installations.
Is the DuctSeal LG system safe for all environments?
DuctSeal LG is designed to be non-hazardous and environmentally safe, making it suitable for use in various industries, including those dealing with hazardous substances.
Can DuctSeal LG be used for retrofitting existing installations?
Absolutely. The DuctSeal LG system is ideal for new installations and retrofits, providing flexibility and long-term protection in any scenario.
Is DuctSeal LG WIMES Compliant?
It definitely is. DuctSeal LG is used by all Water Authorities in the UK, including Ireland. The WIMES compliance number is 3.02 2019 clause 6.4.3.2D(d)
Related Products
Explore our full range of cable duct sealing systems, designed to meet the demands of various industries and cable diameters.
Why Buy from AC Cable Solutions?
AC Cable Solutions is dedicated to providing high-quality, British-manufactured cable sealing solutions. Our products are engineered to meet the highest performance and reliability standards, and our expert customer support team backs us.
Applications of the DuctSeal LG Re-enterable Duct Sealing System
The DuctSeal LG Cable Duct Sealing System is versatile and suitable for a wide range of applications, including:
- Waste Water Treatment Works: Protects ducted networks from harmful gases and liquids commonly found in wastewater environments.
- Fuel / Petrol Filling Stations: Resists hydrocarbons, ensuring safe and secure sealing in petrol forecourts.
- Telecommunications: Provides robust cable protection in telecom installations, preventing ingress and damage.
- Construction Sectors: It is ideal for sealing smaller cables below 25mm, making it a perfect solution for various construction applications.
If you have large, heavy cables, then it's best to use DuctSeal HG
| Product No. | Product | Duct Opening Max | Max Single Cable Ø | Unit Sold |
|---|---|---|---|---|
| Using 1 x DuctSeal LG Kit – 50 to 125mm | ||||
| DSLG125 | DuctSeal LG | 125mm | 100mm | x1 Kit |
| Using 2 x DuctSeal LG Kit – 150 to 200mm | ||||
| DSLG200 | DuctSeal LG | 200mm | 175mm | x2 Kits |
Installation
How to Install DuctSeal LG
Installing the DuctSeal LG system is straightforward and efficient. Follow these steps to ensure a secure and reliable seal:
- Abrade the first 20mm of the duct & cables. This helps to remove any grease, old sealant, & dust.
- Clean the duct & cables. All debris, grease, & dirt must be removed.
- Wrap the strip of foam circular tubes in the duct and between the cables, ensuring separation between the cables and the inner duct.
- If the foam is pushed too far back, use long nose pliers to pull it forward, leaving a 20mm gap at the front for the GreyStuff or RedStuff Sealant.
- Apply the GreyStuff or RedStuff sealant, starting around the cables and working from the bottom up.
- Wet and squeeze the provided "Magic" sponge to dab GreyStuff or RedStuff, ensuring the sealant has grabbed the cables & duct and giving it a neat & tidy finish.
- Done.
One Kit per Box
All components are included to seal 1 x duct as per the kit size mentioned (A caulking gun is not included but can be sold separately). ** One kit may fill more than one duct, depending on the cable % filled. Call 0161 806 1666 for advice**
Cable Separation
It's imperative to ensure separation between each cable and from the inside of the duct. Our unique daisy-chained circular tubes easily separate and support single or multiple wires.
Running Water
The duct & cables should be dry for best results with no running water. All dirt, oil or grease must be cleaned before applying GreyStuff or Red Stuff. If you have running water, please get in touch with AC Cable Solutions for advice on 0161 806 1666. Most of the time, we recommend using a Kraso Mechanical seal - Click here for further information.
Cure Time
Grey Stuff & Red Stuff will cure 3-4mm daily, depending on the Humidity and temperature. The higher the humidity % and temperature, the quicker GreyStuff will cure. A minimum requirement of 20mm Grey Stuff & red Stuff is required for an effective seal.
Cleaning
Uncured material spillages can be cleaned with a solvent-based wipe.
Health & Safety
Grey Stuff is based on a neutral curing system that is hazard-free to protect users when carrying out tasks like sealing cable ducts. Non-hazardous Zero MEKO.
Compliance
DuctSeal LG complies with WIMES, APEA, ATEX & DSEAR, SEWAGE FOR ADOPTION, and the DCG guidance.
Re-entry & Removal
Grey Stuff & Red Stuff will cure a similar hardness to a rubber eraser, so re-entry and removal are achievable. The ease of this depends on the type of tools used. For example, a sharper tool will be easier than a blunt-ended tool. Only use sharp tools when cables are de-energised. AC Cable Solutions accepts no responsibility for damaged cables.
Cable Suitability
GreyStuff & Red Stuff is a single-component neutral curing system containing no solvents. Our formulation does not damage the properties of a cable sheath or stain surfaces.
Storage
Grey Stuff and Red Stuff should be kept in a cool, dry environment and away from sunlight. The product shelf life is 12 months. Once opened, any remaining product can be used for one month, provided the screwcap is securely fitted.
Features & Standards
| Features | Standards / Measurements |
|---|---|
| Core Features | |
| Water & Gas tight to 1.0 bar | Pressure Resistance: 1.0 Bar |
| Non-slumping | Density: 1.27 |
| High bonding strength | Colour: Anthracite Grey |
| Odourless when curing | Skin Over Time: 10 mins |
| Flexible | Curing: 3-4mm per day |
| Intumescent | Tack free time: 22 mins |
| Very strong porous sticky char is formed when exposed to fire, which has excellent thermal insulation properties. | Hardness: 35 to 38 Shore A |
| Microbial resistance – coverage against Fungi, E-Coli, Escherichia coli, Staphylococcus aureus, & A. brasiliensis | Elongation: 250% |
| UV & Ozone resistant | Flow: 3.33 million cPs at 380°C |
| Non-hazardous | Tensile strength: 0.72 N/mm² |
| Zero halogens used | Operating Temperature: +5 to 40°C |
| Emits 0% MEKO | Temperature Resistance: -35 to +120°C |
| Resistant to Hydrocarbons (Petrol, Diesel, ASTM oil, & LPG Gas) | Intumescence Activation Temperature: 210°C |
| Resistant to Methane, Hydrogen Sulphide, & Chlorine gas – Independently tested. | Shelf Life: 12 months |
| Resistant to many other gases & liquids, for example, ADBLUE & Antifreeze. | Notes: Tested performance varies by environment and installation method |
| Compliance & Standards | |
| Complies with DSEAR duct sealing regulations | DSEAR: Compliant (as specified) |
| WIMES compliant, as described in the WIMES Specification in section 3.02 2019 clause 6.4.3.2d) | WIMES: 3.02 2019 clause 6.4.3.2d) |
| Complies with 2011 NEC Articles 225.27, 230.8, 300.5(G), 300.7 (A) on Raceway Seals, and 501.15 (B)(2) | NEC (2011): 225.27, 230.8, 300.5(G), 300.7(A), 501.15(B)(2) |
| Petrol station forecourt accepted, as per the technology described in the APEA Blue book - 4th Edition, 4.6.8 | APEA Blue Book: 4th Edition, 4.6.8 |
| ATEX Compliant – Contains no moving parts or any form of material that can create a spark | ATEX: Compliant (as specified) |
| Ultra-low VOC emissions and improved indoor air quality performance | Indoor Air Quality: Indoor Air Comfort GOLD, BREEAM Exemplary Level, EMICODE EC1 Plus, French A+ and EU Taxonomy criteria |
| Zero MEKO formulation to help reduce installer exposure to MEKO-related curing emissions | MEKO Emissions: Zero MEKO / 0% 2-butanone oxime |
| Fire resistance performance tested using GreyStuff sealant | Fire Resistance Test: BS EN 1366-3:2021+A1:2024 |
Blogs
The following BLOGS provide additional technical information, tips and tricks, and do's and don'ts about our duct sealing system.
- To learn more about WIMES compliance > Click Here <
- To learn more about MEKO, and 2-Butanone oxime > Click Here <
- To help choose a duct sealing system > Click Here <
To view all our BLOGS revolved around duct sealing, > Click Here <