Firestopping has been the sole focus at Nelson for nearly four decades.

Since 1963, Nelson Firestop Products have been used to offer protection against fire, smoke, water and explosions in military and commercial marine vessels, oil rigs, production platforms, and more recently, in commercial and industrial buildings. All the while, Nelson has invested heavily in research, development and testing. In fact, Nelson generated the first test to be recognized by an independent laboratory for through-penetration firestop systems-back in 1966, for Nelson's MCT (Multi-Cable Transit) System.