And, according to the manufacturer, Ensign-Bickford Aerospace & Defense Company the materials uses are:
Demolition/Breaching – PRIMASHEET® 1000 is an excellent tool for general demolition applications. It can be easily cut to any desired shape and applied with adhesive or incorporated into a charge holder. The flexible sheet can be applied as strips directly on a the target or used to improvise linear shape charges.
Demolition/Breaching—PRIMASHEET® 2000 has a higher density than C-4, is unaffected by charge manipulation, and therefore offers a more consistent performance in all standard applications. It can be easily cut to a desired shape and applied with adhesive or incorporated into a charger holder.