🌍1. Reshape the clay can depend on the size of the hole/gap.
🌍2.Can be perfectly blended with the surface.
🌍3.Air-dry in only about 3-5 days.With a flame retardant, Waterproof.
🌍Environmental protection materials, care for your health🌍
Q:Can this be used to seal around a heating pipe, or can you recommend something else?
A:This is what the description for it says, "It expands to fill holes, cracks, gaps and voids around windows, doors, pipes, outlets, vents...", so I should think it would be fine although I'm not positive.