Cable Jointing Resins
uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager
LV MV HV Cable Jointing Resins
Prysmian JEM Resin was developed to meet the growing concerns regarding Jointer exposure to isocyanates in the workplace, especially when using cable joints for jointing utility cables in confined spaces and cable trenches with inadequate ventilation.
JEM Resin developed by Prysmian is a non-isocyanate cable jointing resin with all the technical performance characteristics of conventional jointing resins but with additional features and benefits for the encapsulation of LV, MV or HV joints typically operating at 600V/1000V, 11kV and 33kV.
Changing Legislation For Cable Joint Resins
From December 1st 2010 cable jointing resins containing MDI (Methylene diphenyl diisocyanate) are re-classified as Carcinogen Category 3, suspected of causing cancer and will carry new labelling to this effect.
Subsequently, Prysmian is advising utilities, cable jointing contractors and specifiers to adopt a “Substitute it Now (SIN)” philosophy when it comes to choosing which resin products to use for jointing cables.
This applies to the vast majority of cable jointing resins on the market, except for Prysmian’s JEM resin cable jointing solutions which are 100% MDI free and present none of the health and safety risks associated with other jointing resins containing hazardous chemicals. From December 1st all Prysmian resin cable joint kits will be JEM resin only.
JEM Resin Pack Quantities & Order Codes
Contact Thorne & Derrick Sales for stock availability and current pricing for JEM:
| Prysmian Resin Order Code | Description | Colour |
| JEM400 Prysmian | Cold Pour Resin Compound 4 Litre (8 x 0.5 Litres | Green |
| JEM600 9X Prysmian | Cold Pour Resin Compound 6 Litre (3 x 2 Litres) | Green |
| JEM200P Prysmian | Cold Pour Resin Compound 6 Litre (3 x 2 Litres) | Green |
Cable Jointing Resins. Joint Encapsulating Material (JEM).
Prysmian JEM Resin Cold Pour Compound Features & Benefits
➡ Watch & Learn from this video by Prysmian Group on how to Mix, Pour & Deliver the JEM range of cable jointing resins:
Prymsian JEM Resin
| Properties Of JEM Resin | |
| Type | Low hazard, isocyanate free |
| Appearance / Colour | Grey / brown fluid when mixed |
| Viscosity Of Mixture @ 5°C | 3700 mPa.s |
| Relative Density | 2g/cm³ @ 25°C |
| Flash Point | >110°C |
| Non-volatile Content | 85% |
| Storage Conditions | Away from direct sunlight <50°C |
| JEM Resin Application Properties | |
| Mixing Ratio – by weight | 5.6 powder: 1 liquid |
| Flash Point | >110°C |
| Pot Life | 16mins @ 5°C |
| 5mins @ 40°C | |
| Gel Time | 15mins (0.5 litre @ 25°C) |
| Peak Exothermic Temperature 0.5litres | 35°C @ 5°C |
| 70°C @ 40°C | |
| Complete Cure Time | 24 hours @ 25°C |
| JEM Resin Performance Properties | |
| Colour Of Mixture | Grey / Brown |
| Class Of Resin | Methacrylate |
| Water Absorption Rate | 0.011% @ 24hrs, 25°C |
| 0.8% @ 42days, 50°C | |
| Hardness | 74 Shore A |
| Volume Shrinkage After Curing | <1.0% |
| Tensile Strength | 2.5 N/mm² |
| Ultimate Elongation | 50% |
| Impact Strength | No break |
| Volume Resistivity | 5 x 10¹³ Ohm.cm @ 20°C |
| 7.4 x 10¹¹ Ohm.cm @ 90°C | |
| Surface Resistivity | 1 x 10¹³ Ohms |
| Dielectric Strength | 9.3 KV/mm |
| Thermal Conductivity | 1.31 W/m.K |
| Maximum Continuous Operating Temperature | 95°C |
| Time To Energise LV Joints (Undisturbed) | Immediately |
| Time To Energise LV Joints (Backfilled Or Moved) | 2hrs |
The Jointer must take care when mixing the JEM Resin prior to pouring into the cable joint shell or mould.
 |
 |
| Step 1: Open container and remove JEM Resin Kit. The Jointer should check the resin bag for any signs of damage before proceeding | Step 2: Aerate the powder by gripping the pouch at each end and tumbling the powder for up to thirty seconds, this will facilitate mixing of the JEM Resin |
 |
 |
| Step 3: To start the mixing process, hold the JEM Resin bag as shown above, so that the liquid is forced onto the powder | Step 4: Squeeze the liquid through the membrane seal and onto the powder |
 |
 |
| Step 5: Make sure that the membrane seal is completely open before mixing the powder and liquid together | Step 6: Before mixing the Jointer should rotate and shake at the corners to free the powder |
 |
 |
| Step 7: Tumble mix and knead the JEM Resin bag for up to two minutes, to ensure that there are no lumps in the bag | Step 8: Finally cut one corner and pour the contents into the cable joint shell |
Customer Question…
“I’m supervising electrical connections on Scottish Power’s LV network – service joints of varying types. We have a cable jointer query regarding curing time of the Prysmian JEM resin you supply which I need to get completely right. Many cable jointers say leave the joint for 24 hours to cure, some say 2 hours. What is your standard curing time for service joints? Let’s assume it’s a single phase service off a 300sqmm PILC cable. Please bear in mind that we want to backfill and compact the joint bay in order to reinstate the joint bay, so assume we’re using a rammer. Obviously we will not backfill/reinstate if it compromises the cable joint’s integrity, however, we do have pressures to reinstate said joint bays as soon as possible.
Prysmian Answer…
“Full cure is not achieved for 24 hours but Prysmian JEM resin joints can be energised immediately provided they are not being moved.”
3M Scotchcast resin insulated cable joint kits are designed for indoor, outdoor (weather exposed), direct buried or submersed applications.
3M brand Scotchcast Resins are 100% solids, electrical grade, hydrolytically stable insulating resins. The unique electrical and physical properties of 3M Resins make them ideal for insulating and protecting electrical/ electronic parts and assemblies. Their physical features also make them suitable for non-electrical, general use applications, for example as adhesives or sealants.
A Safe, Clean, Simple & Reliable Joint Solution
• High quality range of cable jointing resins for low and medium voltages
• Unique Patented Close Mixing and Pouring (CMP) system from 3M Electrical
• Transparent Mould for better control of the job by the Jointer
• Resin packed in transparent 2-chamber mixing bags for delivery into the cable joints
• Cable jointing resins with approvals according to VDE 0291 part 2
♦ G38A Compund | Prysmian BICC Cable Joint, Termination & Cable Box Filling Compounds
uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager
Thorne & Derrick International, the UK’s leading distributor and largest stockist for 3M Hazardous Area & Cold Shrink Cable Accessories have despatched over one thousand 3M CSCAK abandonment kits to the North Sea Forties Pipeline System and Kinneil Terminal.
3M CSCAK cable abandonment kits are used to safely decommission redundant LV low voltage power cable circuits in the oil, gas and petrochemical industry.
3M Electrical cable abandonment kits using Cold Shrink, are suitable for Zone 1 and Zone 2 hazardous area electrical installations without need for heat shrink, “hot-working” and naked flames in potentially explosive environments – CSCAK abandonment kits suit EEMUA 133 XLPE lead sheathed power cables (600/1000v and 3.3kV) for safe installation in hazardous area locations according to the ATEX Directive.
Cold Shrink product features at a glance :
3M Cable Abandonment Kits suit XLPE/PVC Insulation, Lead Sheath, Steel Wire Armour, PVC Sheathed – including Shipwiring cables (EPR GSWB Wire Braided) and Unarmoured cables up to and including 3.3kV single and multi-core cables.
The cable abandonment kit uses a 3M Cold Shrink cable end cap, pre-stretched cold shrink tubes, Scotch 2228 Mastic Tape, Scotch 23 Self Amalgamating Tape and Scotch 24 Electrical Shielding Braid (tinned copper mesh tape) and constant force springs.
Cable abandonment kits are often used when cable is left underground but it is not intended to be left live. If by mistake it has power connected to it, the cable abandonment kit is designed to create a short circuit to earth so that it will trip out, thus it will render the circuit dead to enable the engineer or cable jointer to realise power was switched to it by mistake.
In this design by 3M Electrical, there are no provisions for stress control tapes or systems and screening because it is just not meant to be left live.
The range-take of 3M CSCAK Cold Shrink products according to both outside cable diameters (around outer cable sheath) and conductor cross section areas (core) for both single and multi-core cables are as follows:
| Cable Abandonment CSCAK Kit | XLPE AWA Single Core | XLPE SWA 2 Core | XLPE SWA 3 Core | XLPE SWA 4 Core | 3.3kV XLPE SWA Lead 3 Core |
| 3M CSCAK/1 | – | 1.5-6sqmm | 1.5-6sqmm | 1.5-4sqmm | – |
| 3M CSCAK/2 | 70-120sqmm | 10-35sqmm | 10-16sqmm | 6-16sqmm | – |
| 3M CSCAK/3 | 150-500sqmm | 50-150sqmm | 25-120sqmm | 25-95sqmm | 25-95sqmm |
| 3M CSCAK/4 | 500-630sqmm | 185-400sqmm | 150-185sqmm | 120-150sqmm | 120-185sqmm |
| 3M CSCAK/5 | 800-1000sqmm | – | 240-400sqmm | 185-400sqmm | 240-400sqmm |
Why Play With Fire? Keep Your Cool with 3M Cold Shrink……
Heat shrink cable joints, terminations and cable accessories require naked flames.
But hot-working poses serious dangers with respect to ignition sources in industrial and hazardous areas – air, naked flames and the presence of atmospheric combustible substances trigger the Ignition Triangle.
Install 3M Cold Shrink for a first class safety and service record without any hidden dangers.
3M Cold Shrink products include cable joint kits, cable termination kits, cable abandonment kits and cold shrink tubing – extensively specified for offshore oil, gas, petrochemical, rail, utility and construction projects at low and high voltages.
Video : 3M Cold Shrink Cable Abandonment Kits ➡
Should you require customer service or technical support on the selection or specification of LV MV HV Cable Accessories please contact us – view the full range of 3M Cold Shrink Cable Abandonment Kits below.
Thorne & Derrick stock and distribute LV Joints in Cold Shrink, Heat Shrink or Resin Cast technologies – multicore and multi-pair cable joints are available for immediate backfill and energisation of Low Voltage power, control and instrumentation cables 600V/1000V 3.3kV.
Complete range of LV Cable Accessories ➡
Cable Breakouts | Cable Caps | Cable Lugs | Cable Cleats | Cable Trough | Cable Duct | Feeder Pillars | for 11kV/33kV/66kV networks see MV HV Joints & Terminations
Pfisterer | Nexans Euromold | Prysmian | Cable Joints & Terminations MV HV
Cold Shrink by 3M | Joints | Abandonment | Terminations | Low Voltage LV Cables
uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager
Cathodic protection is a technique that is used to protect a metal structure from corrosion under water by acting like an electrical cathode. A simple method of protection connects the metal to be protected to a more easily corroded “sacrificial metal” to act as the anode.
Thorne & Derrick, a leading distributor for Filoform cable joints, have this week supplied 300 off Filoform CPJ95 Cathodic Protection Joints to the oil and gas industry.
Filoform CPJ cable jointing kits are used on cathodic protection applications including pipelines, tanks and buried structures. The CPJ joints can be supplied with or without brass line taps as standard – this range of cable joints suit mains cable single core maximum size up to 120sqmm and branch single core cables up to 35sqmm.
Two variants of Filoform CP cable joints are offered:
CPJ – The classic cathodic protection joint for use when upright branch joints are required
CB0 – A “Y” shaped joint for horizontal branch jointing applications
| Max Cable Size single core (sqmm) | Max Branch single core (sqmm) | Basic Kit- NO CONNECTOR | Kit with Split bolt line tap | |
| Cable Joint Part Number | Part Number | Joint Kit Includes | ||
| 120 | 95 | Filoform CPJ120 | CPJ120+C | Joint + line tap |
| 95 | 95 | Filoform CPJ95 | CPJ95+C | Joint + line tap |
| 95 | 95 | Filoform CB0 | CB0+C | Joint + line tap |
Image: Hubbell
Filoform CPJ95 cable joint is designed to suit mains cable single core maximum size up to 95sqmm and branch single core cable up to 35sqmm.
Typical applications include for cathodic protection cables and cable joints :
Pictured : Filoform Cable Joint (Cathodic Protection) – cable joint kit includes mould, jointing resin, sealing tapes and mechanical connector for conductor connecting.
Care should be taken by the Jointer to ensure the cable jointing resin is mixed thoroughly and in accordance with the manufacturers guidelines:
 |
| 1. Remove the aluminium outer bag taking care not to damage the clear inner bag. Immediately use the cable jointing resin after opening the aluminium outer bag |
 |
| 2. Remove the separator from the centre of the resin bag |
 |
| 3. Mix contents by kneading vigorously for at least two minutes. Make certain all the resin cable compound is squeezed from the corners and edges of the bag. |
 |
| 4. Pouring of the resin: Cut a small edge from the bag. Carefully pour the resin into the joint shell. Empty (hardened) resin packs can be disposed as regular waste material. |
Attention:
Thorne & Derrick stock and distribute LV Joints in Cold Shrink, Heat Shrink or Resin Cast technologies – multicore and multi-pair cable joints are available for immediate backfill and energisation of Low Voltage power, control and instrumentation cables 600V/1000V 3.3kV.
Complete range of LV Cable Accessories ➡
Cable Breakouts | Cable Caps | Cable Lugs | Cable Cleats | Cable Trough | Cable Duct | Feeder Pillars | for 11kV/33kV/66kV networks see MV HV Joints & Terminations
Cold Shrink by 3M | Joints | Abandonment | Terminations | Low Voltage LV Cables
uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager
3M 82-F2 Flexible Cable Jointing Kits are specified for inline (straight) and tap (branch) jointing of Type 11 Trailing Cables used in underground coal mines to power coal-cutters and face equipment – Thorne & Derrick distribute a complete of cable joints for mining cables using resin cast, heat shrink or Cold Shrink technology for LV (Low Voltage), MV (Medium Voltage) and HV (High Voltage) networks.
Type 11 0.64/1.1kV BS6708 Trailing Cable features an EPR rubber insulation which allows cable flexibility on site for frequent coiling and diverting to support the coal mining extraction process. 3M Scotchcast 82-F2 cable joints feature Scotchcast 2131 resin which is flexible, flame retardant and moisture sealing for damp working environments experienced in deep underground coal mines.
3M 82-F2 flexible cable joints allow trailing cable to maintain cable bend radius for handling, installation and reeling applications – compatible with most types of flexible cables including EPR types used in both onshore and offshore locations.
3M 82-F2 submersible cable joints are suitable also for both indoor and outdoor cable installations – this includes weather exposed, direct burial underground, submerged and cable reels.
Pictured: The first automated drill for the small-face drilling segment, the Boomer S2’s COP from Atlas Copco. Johan Halling, President of Atlas Copco’s Mining and Rock Excavation Business Area, said he is optimistic about the future of coal mining. “The global mining industry has experienced downtrends before, and each time it has managed to bounce back and become even stronger, largely thanks to the development of innovative products and new thinking,” Halling said. “I am certain that the current downtrend is no exception.”
3M Scotchcast 82-F2 cable splices are assigned by the Mine Safety & Health Administration (P-142-5 MSHA).
Mining Cable Joints – MHSA Approved
T&D stock both the 3M 82-F range of Scotchcast Inline and Tape cable joints utilising Scotch Electrical tapes for the jointing, repair and re-jacketing of damaged mining cables, including flexible and trailing cables.
3M 82-F Scotchcast cable joints accommodate outside cable diameters up to 30mm. For jointing or repairing flexible and trailing above 30mm diameter, T&D stock and recommend the 3M Resin Flexible Cable Repair & Jointing Kits which suit up to 152mm outside diameter cables.
3M Flexible Cable Jointing & Repair System
Flexible mining trailing cables are for use with shuttle cars, coal cutters and similar face equipment.
Type 11 Trailing Cable (Mining) – 3M Scotchcast 3M 82-F2 Cable Joints
3M Scotchcast resin cable joints are available to suit :
3M Scotchcast resins are highly modified to resist degradation and contamination by acidic and alkaline dusts experienced in the global mining and quarrying industrial sectors such as coal, clay, china clay, chalk, gypsum and limestone.
Mining & Quarrying Conveyors
Electrical plant, equipment and machinery in the mining industry is designed and manufactured to withstand harsh environmental conditions. Naturally, cables and cable accessories such as cable joints should be carefully specified to avoid downtime caused by installation of underspecified equipment.
3M Scotchcast Cable Joints – Mining Quarrying
Global economic growth and infrastructure development depends heavily on mined and quarried natural resources such as minerals, metal ores and coal. Open-cut and underground mining operations require powerful electric machines and cabling to enable extraction. Electrical equipment and cable systems are routinely exposed to heavy dust pollution, high machinery vibration and G-forces. Large scale digging and excavation equipment for open-cut mines, such as electric power shovels and large scale conveyors, require trailing, level-wind cable reels. Drill and blast equipment used for hard rock and underground mining require rugged, compact cable management systems. Mobile power is also needed for shotcrete machines, blast-hole drills, ceiling bolters, and other underground equipment.
Open Cut Mining At Glencore Bulga Coal
Underground Shuttle Car Loading Coal
Hydraulic Face Shovel Loading Coal In Dump Truck
Complete range of LV HV Cable Accessories to support the installation of mining cables.
Cable Glands | Cable Cleats | Cable Joints LV | Cable Joints MV HV | Cutting Tools | Crimping Tools | Cable Labels
➡ Contact T&D for 3M, CATU, Cembre, CMP, Ellis Patents, Emtelle, Euromold, Filoform, Furse, Nexans, Pfisterer, Prysmian and Roxtec.
uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager
A common question posed by LV cable jointers concerns the conductor jointing of dissimilar metals or core construction in underground cable joints.
Thorne & Derrick can make recommendations to overcome the potential problems encountered when cable jointing aluminium to copper cables and provide guidance on best practice to avoid potential corrosion problems within resin cable joints up to 3.3kV.
Typical applications could involve the transition cable jointing of BS5467 XLPE SWA copper conductor to existing imperial PILC SWA aluminium conductor cables in an underground application (or direct burial) in a cable trench.
3.3kV cable joints utilising heat shrink technology and mechanical shearbolt connectors are available for the jointing of power cables up to 3.3kV in accordance with IEC 60228 and IEC 60502 – this includes the cable jointing of circular to sectoral conductors.
Similarly mechanical style conductor connectors are commonly used to joint conductors with divergent cross section areas – often called “reducer connectors” the shearbolt type connectors permits the “step-down” jointing of cables within the range accommodation of the connector.
Where crimp connectors from manufacturers such as Cembre are “dead-sized” and specified to connect “like-for-like” sized metric conductors the mechanical connector allows improved cable application ranges.
Mechanical shearbolt connections, such as Pfisterer, provide quick to install options for jointing dissimilar conductor types and constructions, whether circular, sectoral, stranded or solid – suitable for power systems at 3.3kV, 11kV, 33kV and up to 66kV.
Pfisterer Sicon connectors are used by Jointers to provide immediate and reliable connection of all types of cable conductors.
➡ Video. Pfisterer Sicon Connectors – Safe & Reliable Cable Conductor Jointing.
The range-taking nature of mechanical connectors allow the jointing of different cross section area conductors together without resort to crimp tooling.
➡ Read Blog: Overcoming Cable Corrosion On Steel Wire Armoured & Braided Cables
1. Atmospheric action
2. Galvanic action
For atmospheric action to result in cable corrosion both moisture and oxygen must be present within the cable joint.
Galvanic action results in corrosion when 2 dissimilar metals in an electrolytic series, such as copper and aluminium, are in physical contact.
This contact could be caused by the compression or crimping of aluminium and copper conductors together causing any moisture present to act as an electrolyte. In this situation, the copper becomes a cathode and receives the positive charge and the aluminium becomes the anode receiving a negative charge.
The resultant current flow attacks the aluminium leaving the copper unharmed.
Cable joints utilising Scotchcast Resins are trusted to provide uninterrupted power supply to electrical infrastructure in industrial and hazardous area locations – specialist application and chemical formula resins are available including hydrocarbon resistant, flame retardant, submersible and zero halogen types.
To avoid bi-metallic corrosion caused by the connecting of the copper to aluminium conductors, 3M Scotchcast LVI resin cable joints can be used – 3M cable joints are fully encapsulated with either 3M Scotchcast 470W Resin for industrial cable installations or 3M Scotchast 1402FR Resin for cables being jointed in hazardous areas.
The pouring of the cable jointing resin into the shell eliminates air voids driving out moisture eliminating the basic requirements for galvanic reaction and cable corrosion to occur.
3M Scotchcast Resin LVI-1 Type Cable Joints For Low Voltage Power Cables
Thorne & Derrick stock and distribute LV Joints in Cold Shrink, Heat Shrink or Resin Cast technologies – multicore and multi-pair cable joints are available for immediate backfill and energisation of Low Voltage power, control and instrumentation cables 600V/1000V 3.3kV.
Complete range of LV Cable Accessories ➡
Cable Breakouts | Cable Caps | Cable Lugs | Cable Cleats | Cable Trough | Cable Duct | Feeder Pillars | for 11kV/33kV/66kV networks see MV HV Joints & Terminations
Pfisterer | Nexans Euromold | Prysmian | Cable Joints & Terminations MV HV
Cold Shrink by 3M | Joints | Abandonment | Terminations | Low Voltage LV Cables
Published 25 Mar 2026
klauke ekm60unv – universal cutting, crimping & punching tool The Klauke EKM 60 UNV is a versatile battery powered hydraulic universal tool engineered that can be used as a battery powered cable crimping tool and battery operated cable cutting tools that comes...
Published 18 Mar 2026
INDUSTRIAL LABEL PRINTING SOLUTIONS When clear, durable and professional identification is required across control panels, cable systems, production facilities and industrial installations, print quality, reliability and ease of use are critical. Cembre industrial label printers are designed to support...
