SylWrap HD Pipe Repair Bandage

SylWrap Pipe Repair Bandages are water-activated and set rock hard in minutes, helping to strengthen and repair damaged and leaking pipework

SylWrap HD Pipe Repair Bandage is a water-activated composite wrap with low free diisocyanate content below 0.1% which strengthens and protects pipework, extending the lifespan of systems.

Applying SylWrap HD to a pipe increases pressure resistance, chemical resistance and hoop strength. It will reinforce leak and damage repairs made using epoxy putties, pastes, coatings, or pipe repair tape by providing a rock-hard, impact resistant layer over initial sealant materials.

The fast-working resin infused in SylWrap HD begins to cure within minutes, allowing for rapid repairs to be made. Unlike other moisture cured repair wraps, SylWrap HD contains less than 0.1% free diisocyanate.

This means SylWrap HD is not covered by the 2023 EU and UK REACH legislation governing the safe use of diisocyanates and requires no mandatory safety training before use. At the same time, the low hazard formulation offers reduced risk to operators.

SylWrap HD is temperature resistant to 120°C and effective on pipes of all sizes made of steel, stainless steel, copper, malleable iron, GRP, ceramic, most plastics, clay, concrete, rubber, and lead.

Water utilities companies in the United Kingdom keep SylWrap HD on their vans for reinforcing repairs to leaking pipes and burst water mains. SylWrap HD has WRAS Approval, meaning it is certified to British standards as safe to use on pipes carrying drinking water.

Desalination plants, wastewater treatment works, nuclear power plants, oil refineries and fire stations have all used SylWrap HD for pipeline reinforcement. The high chemical resistance of the Bandage enables it to repair hydrogen lines and sulphuric acid lines.

Sylmasta manufacture a specialist composite repair wrap for use in marine applications. SylWrap CR is infused with corrosion inhibitors to protect and strengthen metalwork against all forms of corrosion.

About

Case Studies

Repair Calculator

Size Guide

About

How to strengthen and protect pipework with SylWrap HD

SylWrap HD is easy to use. Dipping the Bandage into water activates the resin. The Bandage is then wrapped around the pipework requiring strengthening or protection with further water used to smooth it down as the application continues.

SylWrap HD has a work time of 2-5 minutes. A functional cure is achieved in 30 minutes and a full cure with maximum properties in 24 hours.

To determine the quantity of SylWrap HD and Bandages sizes for a specific reinforcement or strengthening application, please go to the Repair Calculator Tab and enter your data.

Applications

Steel pipe repair, copper pipe repair, PVC plastic pipe repair, steel pipe repair, iron pipe repair, GRP pipe repair, ceramic pipe repair, concrete pipe repair, lead pipe repair, rubber pipe repair
Underwater pipeline strengthening and refurbishment
Increasing pressure resistance, chemical resistance and hoop strength
Protection of structures other than pipes, such as machinery and piles

Benefits

Easy to use – simply activate the Bandage using water and wrap
Applied in under 30 minutes
Refurbishment of pipes offers a cost-effective alternative to system replacement
WRAS approved so safe to use with drinking water
Low hazard formulation is safer for operators and means no mandatory safety training required under 2023 safe use of diisocyanate legislation

Technical Data

Working Time:
2-5 minutes, dependent upon size of SylWrap, temperature of water and pipework.

Functional Cure:
30-45 minutes.

Full Cure:
24 hours (maximum properties).

Cured Material Life:
10-20 years, dependent upon repair quality, repair thickness, condition of pipe, environmental conditions, pipe temperature, etc.

Shore D Hardness:
70.

Tensile Strength:
250MPa.

Coefficient of Thermal Expansion:
7.1 x 10/ °C (SylWrap composite wrap)

Max Service Temperature:
120°C / 250°F.

Max Pressure Resistance:
30 bar (430 psi), depending on size of pipe and leak (hole requires epoxy filler first).

Chemical resistance: Acetone, ammonia, sulphuric acid (30%), ethyl alcohol, mineral spirits, gasoline, MEK, toluene, diesel, hydrochloric acid, Varsol, ethylene glycol, crude oil, hydraulic oil (test period of 40 days).

Full TDS Downloads

Download SylWrap HD TDS

Case Studies

SylWrap Pipe Repair Bandage Case Studies

Malaysia Water Company 6 Bar Live Leak Repair 300mm Steel Pipe at Treatment Plant

One week after Sylmasta presented to water industry stakeholders in Malaysia, one supplier use their new SylWrap Contractor Case to seal a 6 bar live leak at a treatment plant

City Authority in Canada Repair Underground 600mm Concrete Water Main Pipe Break

A city authority in Canada repair an underground 600mm concrete water main pipe leaking at 2 bar pressure from a break at the exact point the line passed into a wall

Hospital Seal 1.05-Metre Long Crack in Cast Iron Downpipe Leaking Rainwater into Ward

A 1.05-metre long crack in an internal cast iron downpipe leaking rainwater into a hospital ward is sealed within 30 minutes of being discovered with no disruption to patients or staff

Water Company Ductile Pipe System in Underground Pumping Station Corrosion Protection

A water company take corrosion protection measures for a complex 600mm ductile pipe system showing signs of surface damage in an underground pumping station

Costa Rica Sugar Mill Live Leak Pipe Repair of 70mm Alcohol Line Operating at 2 Bar

Having a SylWrap Pipe Repair Contractor Case on site enables a sugar mill to make an instant live leak repair to an alcohol line, avoiding downtime during the short sugar milling season

London Cottages Corroded 48 Metre Long Shared Water Supply Pipe Leak Repair

Four cottages in a terrace of eight repair their respective sections of a 48 metre shared water supply pipe breached by corrosion after low-quality lagging trapped moisture against the line

Industrial Plant Refurbish 3 Metre Section of Corroded Steel Gas Pipe in CHP System

An industrial plant refurbish a 3 metre section of steel pipe carrying natural gas as part of the site’s CHP system which had been weakened by heavy corrosion

Water Network Underground 150mm Cement Coated Steel Pipe Live Leak Repair

A cement coated steel pipe on a water network in Mexico undergoes a live leak repair after removal of the outer coating revealed a 80mm long split in the line

Portable Horse Shower Unit Repair of Copper Pipes Burst in Freezing Weather

When UK temperatures dropped to -15°C, owners of horse showers supplied by Showerking were directed to repair burst pipes within their units using SylWrap

Pig Farm Biodigester Tank Leaking Stainless Steel Heating Pipe Repair

A pig farm seals a leaking heating pipe inside a biodigester tank damaged by a metal pillar connected to a mixer blade after an initial patch welding repair attempt failed

Argentina Chroming Factory Reinforce Welded Corners in Chromic Acid Tank

New corners welded in place during the repair of a corroded chromic acid tank are reinforced using patches of SylWrap Pipe Repair Bandage for additional sealing security

Boat Engine Pipe Repair Pinhole Leak in Bend of Rubber Cooling Hose

A rubber hose operating as part of a boat engine cooling system is repaired after developing a pinhole leak in a below deck area of the vessel which was difficult to access

Wastewater Treatment Plant Seal Pipe Flange Against Tree Root Ingress

A 18000mm underground pipe at a wastewater treatment plant is sealed and protected against tree root ingress after the line was penetrated between flange plates

Landfill Site Encapsulate Decommissioned Drainage System Capped Pipe Stub

The decommissioning of an underground drainage system at a landfill site required a capped pipe stub to be encapsulated for protection against corrosion

Chemical Plant Repair 350mm Steel Effluent Pipe Running Under Salt Marshes

A chemical plant accesses, excavates and repairs a leaking effluent pipe running under salt marshes and out to sea in an eight hour window whilst the tide was out

Libya Water Supply Network Above & Below Ground Live Leak Pipe Repair

Above and underground water supply pipes servicing a town in Libya required live leak repair to seal cracks with minimal disruption to homes and businesses

Puerto Rico Power Station Cooling System Leaking Hydrogen Line Pipe Repair

A hydrogen line newly installed in a power station cooling system undergoes repair and reinforcement after it was found to be leaking from two joints 600mm apart

Fire Station Water Pumping House Corroded Steel Pipe Reinforcement

A 6 metre section of 150mm steel pipe containing two elbow bends at a fire station in Saudi Arabia is reinforced before heavy corrosion could breach the line

Quarry Wash Plant 150mm Steel Pipe 90 Degree Elbow Bend Leak Repair

A quarry who previously repaired all leaks on site using clamps required a more versatile method when a pinhole leak developed close to a 90 degree elbow bend

District Heating System Suspended in Ceiling Cavity Live Leak Pipe Repair

An energy company reap the benefits of carrying SylWrap Contractor Cases on their vans by making a rapid live leak repair to a steel district heating pipe in a ceiling cavity

90-year-old Cracked Malleable Iron Private Water Supply Pipe Repair

The repair of a 90-year-old malleable iron pipe for which replacement fittings were no longer made avoided digging out and replacing an entire water supply line

An emergency pipe repair carried out on a leaking 450mm wastewater pipe at a Water Treatment Works in the United Kingdom

Wastewater Treatment Works Contaminated Water Pipe Live Leak Repair

A live leak repair to a wastewater pipe breached during construction work at a treatment plant prevents a potentially damaging environmental incident occurring

Seawater Cooling System 1500mm Pipe Supply Line Leak Repair & Reinforcement

A seawater cooling line in Saudi Arabia undergoes repair and reinforcement after a snapped nozzle created a 50mm hole and a 5 metre vertical discharge of water

Malaysia Pumping House 150mm Steel Elbow Live Pinhole Leak Repair

A water company in Malaysia repair a 150mm steel elbow at a pumping station after corrosion caused a pinhole, through which water was jetting at 6 bar pressure

Libya Leaking Underground 200mm Fuel Oil Line 44 Bar Pressure Pipe Repair

An underground 200mm fuel line in Libya undergoes a leak repair pressure resistant to 44 bar after corrosion caused a crack to appear through which oil was escaping

Bahrain International Airport 100mm UPVC Pipe Step Joint Live Leak Repair

Bahrain Airport avoid having to shut down an important system to fit replacement parts by making a live repair to a 100mm UPVC pipe leaking from a step joint

Camper Van Boiler System Cracked Leaking Copper Pipe Repair

A cracked copper pipe in a camper van boiler system spraying a pressurised jet of water whenever the boiler was turned on is sealed in a DIY pipe repair by the van owner

Petrochemical Refinery 100mm Sulphuric Acid Line Pipe Elbow Reinforcement

A petrochemical refinery in Saudi Arabia reinforces an elbow on a 22 bar sulphuric acid line after it was discovered to have degraded to just 1mm thickness

Leaking coupling joints on a 650mm ductile iron pipe located in an inspection pit are sealed using SylWrap Pipe Repair products

Inspection Pit 650mm Ductile Iron Pipe Leaking Coupling Joints Repair

A water company repair two faulty couplings connecting a section of 650mm pipe to a mains water line discovered to be leaking within a disused inspection pit

Saudi Arabia Cracked 250mm PCCP Stub Live Leak Pipe Repair & Reinforcement

An engineering company in Saudi Arabia make a live leak pipe repair to a cracked PCCP stub with no isolation valve operating under 4 bar pressure

A SylWrap Pipe Repair made to an air conditioning pipe in a London hospital

Hospital Burst 300mm Air Conditioning Water Return Pipe Emergency Repair

A London Hospital make an emergency repair to a burst pipe which had forced the shutdown of the air conditioning system on a day when temperatures hit 27ºC

A 600mm asbestos cement pipe leaking from both ends of a sleeve undergoes repair using a SylWrap Pipe Repair Kit

Mexico Buried 600mm Asbestos Cement Leaking Pipe Sleeve Repair

A water utility company in Mexico repair a buried 600mm asbestos cement pipe after discovering it was leaking from both ends of a sleeve

Repair of a plastic pipe in a UK quarry leaking from a pinhole

Quarry Aggregate Wash Plant Pierced 300mm Plastic Pipe Pinhole Repair

A quarry repairs a 300mm plastic pipe in its aggregate wash plant which was suffering from a pinhole leak after becoming pierced during day-to-day operations

A longitudinal split in a plastic pond supply hose suffering from a bad cut undergoes a repair using a SylWrap Universal Pipe Repair Kit

Pond Plastic Supply Hose 80mm Longitudinal Split Leak Repair

A property owner repairs a 300mm area of damage including a 80mm split in a buried plastic hose supplying water to a pond after it was cut into with a pruning saw

Reinforcement of weakened 450mm cast iron elbow joints takes place in a valve chamber

Valve Chamber Below Specification 22 Degree Elbow Bends Reinforcement

After a 22 degree elbow blew out in a valve chamber due to being below spec, a water company reinforced all remaining joints to prevent similar incidents occurring

Pipe Bridges Lifespan Extension Through Leak Repair & Reinforcement

A utilities company repair and reinforce two 20 metre pipe bridges leaking sewage from corroded joints into a stream below, extending the lifespans of the structures

Church Central Heating Steel & Iron Welded Pipe Joint Leak Repair & Encapsulation

A church in the UK repairs and encapsulates a leaking welded joint where a 100mm cast iron pipe stepped down to a 50mm steel pipe via a 6mm thick steel plate

Argentina Oil Well 900mm Steel Pipe Repair & Surface Restoration

An oil well in Argentina repair a 900mm steel pipe suffering from heavy surface damage and ruptures caused by corrosion located near a tee and welded joint

District Heating System Corroded Underground Pipe Leak Repair

Two sections of corroded leaking pipe in a district heating system undergo repair to avoid shutting down the system in the depths of winter to fit replacement parts

Essex Flats Ruptured 20 bar Cast Iron Water Supply Pipe Repair & Reconnection

A contractor repairs a ruptured section of 70mm cast iron water supply pipe before reconnecting it to the network, keeping water running for a block of flats in Essex

The repair of a leaking cast iron wastewater pipe at an iconic central London hotel

London Hotel Cracked Cast Iron Wastewater Pipe Elbow Repair

An iconic London hotel repair a 50mm x 25mm crack in an iron wastewater pipe above a prestigious room, allowing the room to reopen to the public

SylWrap Pipe Repair carried out on a leaking PVC plastic pipe which was part of a swimming pool filtration system at a leisure centre

Leisure Centre Swimming Pool Filtration System PVC Pipe Repair

A Welsh leisure centre make a live leak repair of a pressurised 50mm crack on an inaccessible 200mm PVC plastic pipe in their swimming pool filtration system

The repair of a leaking sprinkler system carried out using a SylWrap Standard Pipe Repair Kit

Furniture Factory Steel Sprinkler System Pipe Pinhole Leak Repair

A furniture business repair a pinhole leak on a steel pipe tee in their workshop sprinkler system after initially being told the only solution was replacing the leaking section

An underground heating pipe on a farm in the United Kingdom repaired using a SylWrap Universal Pipe Repair Kit

Farm Underground Heating Pipe and Insulation Lagging Repair

Contractors working on a farm fix a leaking underground heating pipe with insulation lagging after cutting into it when mistakenly believing it to be a disused drainage pipe

A CHP System in an on-site Power Plant in the United Kingdom is repaied using a SylWrap Pipe Repair Kit

CHP Plant High Temperature Pipe Leaking Elbow Joint Repair

An automotive company make a high temperature live leak repair to a pipe in their on-site CHP Plant, avoiding the need to shut down power to fit a replacement

A contaminated water pipe repair carried out in a Power Plant in Puerto Rico

Puerto Rico Power Plant Cracked Contaminated Water Pipe Live Leak Repair

A live leak repair to a contaminated water pipe ensured a Puerto Rico Power Station was operating at full capacity 18 months later when Hurricane Maria hit the island

The repair of a leaking underground water main which had proven impossible to fix for 15 years before SylWrap came up with a solution

Underground Burst Water Main Repaired After 15 Years of Leaking

A burst underground 400mm carbon steel water main undergoes a live leak repair after being considered unfixable and left to leak for 15 years

Repair Calculator

SylWrap Pipe Repair Bandage Repair Calculator

The below SylWrap Coverage Calculator can be used to determine the optimum SylWrap HD repair for a pipe reinforcement or strenghthening application.

Enter the diameter of the pipe in millimetres, the length of the area to be wrapped in millimetres and the pressure which the pipeline operates under.

The safety factor is a multiple to include a margin of safety. For example, if pipe pressure is 5 bar and you want a safety factor of two, the calculator will formulate a repair capable of withstanding 10 bar.

Once you have entered your data, the calculator will show you the SylWrap Bandage which is recommended for your application, the required thickness of repair, the number of layers to reach the stated thickness and the quantity of bandages required.

If you wish to see the repair requirements for a specific bandage, the SylWrap size can be changed. The calculator will then determine the repair thickness, number of layers and quantity of bandage required.

Full TDS Downloads

Download SylWrap HD TDS

Size Guide

SylWrap HD Pipe Repair Bandage Size Guide

SylWrap HD is currently available in the following sizes recommended for use on the specified pipe diameters.

Single SylWrap HD can also be purchased as part of the Universal Pipe Repair Kit which includes Superfast Steel Epoxy Putty and Wrap & Seal Pipe Burst Tape for fixing live leaks.


Product Code	SylWrap Size	Pipe Diameter
SYL106HD	25mm x 1.8m	Up to 15mm Pipes
SYL206HD	50mm x 1.8m	15 – 25mm Pipes
SYL212HD	50mm x 3.6m	25 – 50mm Pipes
SYL309HD	75mm x 2.7m	25 – 50mm
SYL312HD	75mm x 3.6m	50 – 75mm
SYL412HD	100mm x 3.6m	50 – 100mm
SYL416HD	100mm x 5.0m	75 – 125mm
SYL616HD	150mm x 5.0m	100 – 150mm
SYL633HD	150mm x10.0m	150 – 300mm
SYL866HD	200mm x 20m	300 – 600mm
SYL1266HD	300mm x 20m	Larger Pipes

Please use the form to enquire about the price and availability of SylWrap HD Pipe Repair Bandage

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