In 1957, Kemper System developed the first cold liquid-applied, fully reinforced waterproofing membrane. Since then, Kemper products have proven to perform at optimum performance on billions of square meters.

In 1982 Kevin Edge, Director of Sentinel Waterproofing started is trade as a qualified waterproofing technician using these products.

In 2002 Sentinel Waterproofing was born, and for the last 13 years have used Kemper systems  and other waterproofing systems based on  monolithic, seamless waterproofing membranes for long-term protection of structures and buildings, other roofing systems such as premium liquid-applied technology offered with a single-source warranty for various full roof assemblies, including green and eco-roofs and thermal insulation built-up bitumen membranes and other surfacing systems such as  liquid-applied resin systems for surfaces with heavy or light vehicular traffic, pedestrian traffic or indoor applications such as mechanical rooms)