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Our expertise, technology and support make Ultraseal the ultimate solution to your porosity sealing challenges

With an unrivalled understanding of process and technology, Ultraseal is the global leader in sealing porosity and leak paths in die-cast, sintered and electrical components.


From the development and manufacture of best-in-class sealants and impregnation systems through to a global network of service centres and the provision of fully managed on-site facilities, our offer is totally focused on meeting our customers’ porosity sealing challenges.

Customers choose Ultraseal because our superior quality, technology and performance provides the most consistent, reliable sealing results, and because we are committed to meeting their process needs completely, delivering better productivity, lower total cost of ownership and exceptional environmental performance.

Truly global presence and unrivalled service quality

With global manufacturing operations and a strategic network of service and support centres, we have a truly international footprint, ensuring a complete and high quality service to meet your requirements. Wherever you’re based, you’ll have fast and reliable access to our expertise and knowledge of the impregnation process – as well as to our sealant technology and equipment.

Ultraseal industry and sector expertise

Offering sealant, technology, managed service and service centres, we shape our products and services to deliver the ultimate solution to sealing porosity.

Approved by manufacturers worldwide

Ultraseal International impregnation sealants and equipment meet numerous industrial, military and automotive OEM and Tier suppliers' global specifications.

See our approved specifications

Innovation and Sustainability

Our history is rooted in developing, manufacturing and supplying innovative solutions to porosity.
Since pioneering the first methacrylate non-recycling sealant in 1976, we have continued to research, develop and launch innovative sealants, vacuum impregnation technology and grow our global offering to support customers in new territories.

Pioneered dry vacuum impregnation

We were the first to introduce dry vacuum impregnation technology

First front load technology

Developed the world’s first front load vacuum impregnation technology to improve speed and efficiency

Ultimate recycling technology

Launched the ultimate recycling-sealant, Rexeal 100, offering unrivalled temperature resistance, stability and performance

Inhibitor innovation

Developed the DB range of detergents and inhibitors for improved performance to meet the demands of modern complex bi-metal components

Sustainable technology

World’s first closed-loop vacuum impregnation system introduced for ultimate process sustainability


Our success is built by our people and so we are always on the lookout for exceptional talent to help us continue providing the ultimate solution to porosity for our customers around the world. Explore our career opportunities and help us deliver the ultimate solution to porosity.

Norman Hay plc

Ultraseal International is a company of Norman Hay plc, a global specialist chemicals, sealants, surface coatings and engineering group with more than 70 years trading history.

Headquartered in the UK, Norman Hay operates in three main business areas: Surface Coatings, Impregnation Sealants and Process Plant.

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