SealteQ Group finds partner in Quadrum Capital


__Stadskanaal/Almelo, 15 February 2024 – SealteQ Group and investment company Quadrum Capital join forces. SealteQ specializes in protecting, strengthening and maintaining concrete and steel structures. The partnership aims to continue SealteQ's strong growth of recent years. __


SealteQ, formerly known as Frans Nooren and currently led by Martin van der Leest and Robert Lunenborg, celebrated its 50th anniversary last year. During this period, the company has grown into a leading player in the field of concrete and steel preservation. With approximately 250 specialists and seven offices, high-quality and innovative solutions are provided for technical maintenance challenges both in the Netherlands and abroad. SealteQ operates in various sectors, including infrastructure, energy, industry, civil engineering and residential and commercial construction.

Following the intended participation, the board of SealteQ will exist of Martin van der Leest, Robert Lunenborg and Peter Westra. Together with Quadrum, they will respond to the current challenges in the field of foundation repair and the backlog in maintenance and life extension of crucial infrastructure. The expansion of its geographic presence and the addition of specialistic expertise will be important strategic pillars.

"Quadrum is the perfect partner for us to realize these growth ambitions. Our independently established platform in the specialized maintenance market can be further expanded through this partnership, both domestically and internationally. This partnership represents a solid step to continue the growth of SealteQ. In the partnership with Quadrum, creative entrepreneurship is endorsed in an identical way. This gives confidence in a market that is constantly challenging us," said Martin van der Leest.

Hedzer Wester, Investment Manager at Quadrum Capital: “The level of craftmanship, innovativeness and entrepreneurship within the company is impressive and have made SealteQ a market leader. We look forward to supporting the company in its growth ambitions and working with Martin, Robert, Peter and the rest of the SealteQ team to take the next steps."

Financial details of the transaction will not be disclosed. The transaction is subject to approval of the Consumer & Market Authority. The investment in SealteQ will take place from Quadrum Investment Fund IV.

About SealteQ SealteQ protects and preserves civil engineering, infrastructure and industrial structures as well as real estate objects in the residential and utility sectors. With a Dutch focus but with a global perspective, SealteQ extends the life of concrete and steel structures. They achieve this by providing innovative customized solutions with the aim of protecting the structures against external influences. In this way, they are preserved for the future. For more information, go to

Back to overview
Quadrum Capital