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Submit a quotation form and a member of our team will be in touch to assist you with your order
Submit a quotation form and a member of our team will be in touch to assist you with your order

RedStuff Intumescent Water & Gas Tight Duct Sealant


RedStuff is an exceptional single-component sealant, meticulously formulated with FyBrid technology, boasting neutral curing properties and a non-hazardous composition. This innovative sealant is specifically designed to withstand the challenging conditions present in and around duct openings, guaranteeing optimal protection for ducted networks and penetrations.

Key Features of RedStuff:
1 - FyBrid Technology: RedStuff harnesses the power of FyBrid technology, setting it apart as a superior sealant solution. This cutting-edge technology enhances its performance and durability, ensuring long-lasting results.

2 - Non-Hazardous Composition: Safety is of paramount importance, and RedStuff excels in this aspect. With a non-hazardous formulation, it provides a secure and environmentally friendly sealing solution. Zero Meko / Meko Free 

3 - Single-Component Convenience: RedStuff eliminates the need for complex mixing or additional components. Its single-component nature streamlines the application process, saving both time and effort.

4 - Neutral Curing: The neutral curing mechanism of RedStuff ensures compatibility with a wide range of materials commonly found in duct openings. This feature prevents potential damage or adverse reactions, providing added peace of mind.

5 - Harsh Environment Resilience: Designed to thrive in harsh environments, RedStuff can withstand demanding conditions such as temperature variations, moisture, and chemical exposure. It effectively protects ducted networks and penetrations from potential damage, extending their lifespan.

  • Flame Retardent - tested to: UL94: 2013 ANSI / UL 94: 2018

RedStuff is used within the following Duct Sealing kits
Duct Seal LG, & Duct Seal HG.

Product No. Product Volume Unit Sold
Redstuff310 RedStuff


Cure Time
Grey Stuff will cure 3-4mm daily, depending on the Humidity and temperature. The higher the humidity %, and temperature, the quicker RedStuff will cure. A minimum requirement of 20mm RedStuff is required for an effective seal.

Uncured material spillages can be cleaned with a solvent-based wipe.

Health & Safety
RedStuff is based on a neutral curing system that is hazardous-free to protect users when carrying out tasks like sealing cable ducts. Non-hazardous Zero MEKO.

Re-entry & Removal
RedStuff will cure to a similar hardness of 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
RedStuff is a single-component neutral curing system containing no solvents. Our formulation does not damage the properties of a cable sheath or stain surfaces.

RedStuff should be kept in a cool, dry environment and away from sunlight. Product shelf life is 12 months. Once opened, any remaining product can still be used for 1 month afterwards, provided the screwcap is securely fitted.

Features & Standards
Water & Gas tight to 2.0 bar Feature Measurement
Non-slumping Density 1.27
High bonding strength Colour Red
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/mm^2
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. Pressure Resistance 2.0 Bar
Resistant to many other gases & liquids, for example, ADBLUE, & Antifreeze. Shelf Life 12 months
Complies with DSEAR duct sealing regulations
ATEX Compliant – Contains no moving parts or any form of material that can create a spark