InstaCrete Epoxy Putty Stick is Putty Stick is a fast-setting polymer compound that enables permanent repairs to concrete and masonry. It also bonds to metals, wood, glass and many plastics. Each handy stick contains pre-measured portions of activator and base throughout no measuring or mixing tools are necessary. As the epoxy is mixed, the two contrasting colors blend into one color to indicate complete mixing. The consistency (like modeling clay) eliminates drips and runs, facilitates adhesion to the substrate, and allows the material to be shaped and formed as needed before curing begins. Once cured, it can be tapped, drilled, screwed, sawed, filed, or painted, and will have an appearance and texture similar to concrete. Suitable for interior or exterior use, it is resistant to water, chemicals, and temperature extremes. InstaCrete.epoxy contains no solvents or VOC's. It's non-flammable and releases no noxious fumes. It won't shrink or pull away. The unused portion stays fresh for future use when saved in its original package.