Flamecheck is a fire retardent spray intended for theatrical use but also can be used in many other industries. It will work on any porous service and will remain there until washed off.
The coverage will depend upon the material to be treated but as a guide 1lt will cover approx 100sq ft.
We have a sales demo where we try and set fire to a treated paper tissue, with a blow torch. There is no trickery it chars but wont light
