Green Goo

A Litt • 13 January 2020

Green Goo: What is it and what to do with it?

Black electrical plug inserted into outlet, next to a double light switch, on a beige wall.
Have you ever seen a gooey, oozing green-colour substance in switch or socket-outlet boxes? 
If so, you no need to panic. This blog may provide a useful insight.

Many homeowners who have experienced the same and wonder what to do?
Well, in this blog, we explain what this gooey substance and what can you do about it. 

What is Green Goo? 
In simplest terms, green goo is the output of a chemical reaction that takes place specially on the PVC cables that are pretty old (manufactured during 1965-1971). Copper conductors and plasticizer of those cables react over the time to produce this gooey, sticky, oily and unsightly substance. 

Electricians call this green goo as ‘cable greening’ as well. With that said, if your house is wired using those cables manufactured during 1965-1971, you have a greater chance of finding loathed green goo.

1.Cable greening doesn’t take place overnight. The condition tends to grow gradually under normal conditions.

2.However, under high temperatures such as an overloaded circuit, the production of green goo can increase significantly. 

3.If wiring has loose connections or high resistances are present, green goo production can become rapid.  

4.The biggest concern is the potential for electrical fires caused by the breakdown of insulation especially on older electrical installations that have not been updated.

How to overcome green cable goo? 
Has green goo invaded the wiring installation of your property pretty seriously? Well, in that case, there is no other long term solution other than rewiring the entire premises (definitely with the assistance of a professional, well-experienced electrician). You may need to replace the electrical accessories which are normally included in the rewire. 

When it comes to retaining and working with contaminated wiring and fittings, you must be careful because it can cause some health and safety issues. The substances must be kept away from children and pets. Also, prevent exposing the substances and waste for casual contact. 

In most of the cases, houses that are affected by green goo are normally rewired. 

When handling the materials that are covered in goo, it is essential to wear appropriate protective gear. Also, the hygiene of the workers must be a top-priority when they handle installations that are heavily contaminated. 

An Electrical Installation Condition Report should be conducted to allow for an informed decision to be made on the electrical installation this may also highlight areas of further investigation needed. If the severity of the green goo is within an acceptable limit, we recommend frequent electrical inspections to make note to the increase in the green goo. The frequency of the inspections will be based on the findings of the Electrical Installation Condition Report.

We recommend that the homeowners make frequent visual inspection of:
Plugs
Sockets
Light bulbs when replacing 

If ever in doubt please contact a competent registered electrician without delay. 

If you have anymore questions please do not hesitate to either email or call us. We are here to help.


NAPIT Electrician
by A Litt 23 October 2025
786 Electricals, a Leicester electrician, reveals the real difference between NAPIT and NICEIC. Learn why we switched and what it really means for you.
consumer unit upgrade
by A Litt 22 October 2025
Upgrade your old fuseboard with 786 Electricals Ltd from just £650. Trusted electricians in Leicester & Leicestershire for safe, certified consumer unit replacements.
Consumer Unit Replacement Cost UK
by A Litt 22 October 2025
Experiencing fuse box trips? Learn about consumer unit replacement costs in the UK, including RCBOs, SPD, and metal units. 786 Electricals provides safe, certified upgrades starting from £650.
NAPIT-registered Leicester electrician installing a residential fuse box safely and professionally
by A Litt 19 October 2025
Looking for a reliable, NAPIT-registered electrician in Leicester? 786 Electricals offers expert service at £75/hr (8am–4pm) and £100/hr outside hours. Fully insured. Fast response.
Emergency Electrician
by A Litt 19 October 2025
Need a reliable electrician in Leicester for small jobs? 786 Electricals has served Leicestershire since 2010, offering fast, trusted, and affordable electrical services for homes and business
A reliable electrician from 786 Electricals provides careful and precise electrical testing for a cu
by A Litt 15 October 2025
Had an electrical emergency? Read a 5-star review and discover why 786 Electricals is the trusted, caring choice for all your electrical work, from fault-finding to new installations.
Electrician Prices
by A Litt 5 October 2025
Built on gratitude and trust since 2010, 786 Electricals Ltd (NAPIT Certified) offers full price transparency, no call-out fees, and genuine phone support to help you fix your fault quickly.
Emergency Electrician 786 Electricals Ltd
by A Litt 5 October 2025
Stay safe during an electrical emergency in Leicester. Follow our expert guide, citing Electrical Safety First protocols. Call 786 Electricals 24/7.
Emergency Electrician LEICESTER and Leicestershire
by A Litt 5 October 2025
Find clear pricing for emergency electricians in Leicester. See 786 Electricals' transparent £100/hr rates with NO call-out charge. NAPIT certified
EICR Leicester
by A Litt 3 October 2025
Buying a home in Leicestershire? Discover why an Electrical Installation Condition Report (EICR) is crucial for safety, negotiation, and peace of mind during your UK property purchase. Contact 786 Electricals Limited today.
Show More