Who We Are

Kem-Tuff®, a product of GDS Manufacturing, specializes in stainless steel ductwork systems enhanced with industry-leading corrosive-resistant coatings. Built for environments where exposure to chemicals, moisture, and extreme temperatures is constant.

Kem-Tuff® products have been leading the industry in precision, durability, and compliance for 35 years. Kem-Tuff was designed to meet the increasing demands on industrial process exhaust systems. With a focus on these demands, our engineers have designed a system that will provide users with a high level of system integrity over a long life, resulting in low cost of ownership to the user.
Protecting what matters most, Kem-Tuff systems safeguard people, processes and the environment – reducing risk, ensuring compliance, and supporting sustainability.

Our Mission

To engineer and deliver high-quality coated and non-coated stainless steel ductwork that advances industrial safety and sustainability through precision, innovation, and reliability.

Our Values

Service

Safety

Craftsmanship

Integrity

Our Team of Industry Experts

At Kem-Tuff, our team is the foundation of everything we do. With over 100 years of combined experience across semiconductors, engineering, and critical infrastructure, we bring unmatched expertise and deep industry knowledge to every project. These roots run deep—shaping our ability to solve complex challenges, deliver proven solutions, and build lasting partnerships.

John Waddell

President

John Waddell brings over 25 years of experience in the semiconductor industry to his role as President of GDS Manufacturing. Throughout his career he has led global teams, directed large scale projects, and managed both contractors and internal operations with a focus on efficiency and innovation. His background spans from general contracting to advanced manufacturing, giving him a unique perspective on building resilient infrastructure and delivering high performance solutions. Under his leadership, GDS is recognized as a trusted partner known for its commitment to quality, forward thinking strategy, and strong collaboration across the supply chain.