RW Seals is a specialist leak sealing company focused on metal seals for industrial leak repair. Building on our founders decades of experience in the field, RW Seals has brought M3 to the market, initially for targeted purposes such as SF6 leak sealing but we are pushing the boundary of applicability every day through our dedicated team of engineers.
Our Purpose
Our role is simple. Help operators keep critical infrastructure safe, available and lower impact. We do this by creating reversible, metal based sealing systems that recover leaks quickly, reduce greenhouse gas emissions and support long term decommissioning plans.
What We Do
We develop and apply low temperature molten metal leak seal that can be reheated and removed. You recover performance now and keep options open for later.
Our work focuses on places where leaks are hardest to tackle, either through access or inability to shut down the process, for example SF6 insulated switchgear.
Projects move from desktop assessment and design through testing and on site work, with the same team involved at every stage.
We back every claim with data, test evidence and clear assumptions.
Years Experience
Developing metal alloy sealing technologies for extreme environments.
Seals Placed
On electricity substations across the UK.
Emissions Saved
Sealed while the leak was flowing.
Tolerance
Re-pressurisation tolerance demonstrated for M3 seals.
Dan Norcross
Head of Engineering Operations
Aisling Walsh
Engineering Project Manager
Tommy Smith
Engineering Project Manager
Mags McCreedy
PMO
Our Solutions
Molten alloy spray, applied directly against a flowing leak or defect with minimal surface preparation. Ideal for rapid response, complex assemblies and combined with robotics, applied in restricted access areas.
Read more about M3SprayAlloy casting around pipes, joints and flanges. Custom moulds are placed around the repair site and filled with low melting point alloy for rapid, reversible leak recovery. Moulds are removed and reused.
Read more about M3CastA proven process that uses M3 technology to cut SF6 emissions from high voltage equipment while assets stay in service. Developed for small bore pipework and connections to date.
Read more about SF6 Leak Sealing
Straight answers to common questions about M3, SF6 sealing and how we work with your team.
RW Seals is located in a technology centre in Warrington, Cheshire, UK. While this is our base, we work with customers across the entire UK on industrial sealing and leak recovery.
RW Seals is a small, specialist business with 20 skilled professionals and growing. Our cross-disciplinary team works together to deliver advanced solutions for industrial leak sealing.
We’re supported by a strong leadership and technical team with deep experience across industry and engineering:
Kat Lennox, Managing Director: Kat leads the RW Seals team, business development, and day-to-day operations. She joined RW Seals in 2020 from the UK National Nuclear Laboratory, bringing extensive industry experience and networks.
Mags McCreedy, Senior Project Manager: Mags has 25+ years of project management experience across utilities, pharmaceuticals, banking, and regulated industries. She oversees project delivery, H&S co-ordination, and M3 deployments.
Tommy and Aisling, Engineering Project Managers: Both bring strong engineering expertise, delivering technical solutions and managing customer projects on site.
Dan Norcross, Head of Engineering Operations: Dan is our Head of Engineering Operations to further strengthen our engineering leadership and foster a high-performance engineering culture.
RW Seals was established in 2020, and we have been providing industrial leak repair solutions ever since.
RW Seals operates with robust standards for quality, health & safety, environmental management and information security. Our certifications include:
These demonstrate our commitment to delivering compliant and dependable services across sectors.
Yes, our corporate policies are available on request. Get in touch with our team via phone at +44 (0) 1925 768910 or email at info@rwseals.com to request copies of relevant documents.
Case studies
M3 technologies have been trialled and deployed with leading utilities, moving from innovation projects into live operations.
Case studies from National Grid, and industrial clients show how M3 reduces leaks, avoids outages and supports net zero goals.
High hazard industries require a considered approach, underpinned by data.
National Grid Electricity Transmission (NGET) asked RW to investigate engineered solutions for sealing transformer oil leaks—an issue faced globally across transmission and distribution networks.
A case study of project work with National Grid Electricity Transmission.
Understanding the equipment, the environment, and the impact of your own intervention can only be done on site.
Get in touch to speak to one of our team about your needs and recommended M3 products.