Duct Sealing Compound is a gray, permanently soft, non-toxic compound
which will adhere to most clean dry surfaces. Duct Sealing Compound
will not adversely affect other plastic materials or corrode metals.
It also has no adverse effect to human skin.
There is a Duct Seal specification sheet located on our website under the resources tab that contains all of the products information. It is also listed in our catalog on page 169.