Silicate Cement, Base Silicate Cement, Size 10.1 oz., Container Type Tube, Color Black, Specific Gravity 1.8, Performance Temp. Range 0 Degrees to 2000 Degrees F, Flash Point Greater Than 200 Degrees F, Application Time 1 hr., Application Temp. Range 40 Degrees to 100 Degrees F, For Use With Standard Caulk Gun, Meets ASTM E136 From the Manufacturer
https://www.amazon.com/18854-Mortar-Building-Material-Black/dp/B0006MXS4C