Insul Stick Castable Refractory Dry-Mix.
Made by the company that manufacturers Heat Stop, Insul Stick is a medium-weight castable refractory mix designed for use in a wide variety of interior and exterior masonry applications. Insul Stick's popularity in the masonry business is due mostly to its versatility - once mixed with clean water, it can be troweled, cast into special shapes or sprayed, and it's also ideal for smooth parging over firebrick in fireplace smoke chambers. It provides superior insulating value and strength. True to its name, this mix will stick to just about any non-slippery surface and resists temperatures of up to 2,200 degrees Fahrenheit. You will need approximately 2.5 lbs. of product per square foot when applied 1/2" thick. Available in 5- and 20-lb. pails. And remember, shipping is FREE for all orders (contiguous US only).