Roth, any Home Depot , or good Hardware store has it, Name brands Rutland, Red Devil, Dap, some are black, I got the tan so I could see the repair, cures with heat, can be worked with your 3 way tool useing the spoon, dip it in water first, smooth it out with finger dipped in water, let skin and smoke the shit out of your pipe, builds btms up beautifully, had a Pepino freehand that had a 1/4 inch indentions in btm from someone digging Dottie out, cleaned it out with everclear, flamed the alcohol out, filled the hole ,wet finger and smoothed it out, had a fluffy cleaner in draw hole bent up at a 45 to keep from plugging it up, let skin over, load it up smoke it up, leave ash in at btm, load it up again and smoke her down, your pipe will be fixed, stands 2000degs. The old cajun