Puncture-sealing tire

A tire sealant composition comprising:

• (1) at least one vinylidene-terminated polymer having the formula ##STR24## wherein Z is selected from the group consisting of ##STR25## A is a bivalent radical containing 1 to 10 atoms wherein at least one of said atom is selected from the group consisting of C, O, S and N, R and R.sup.1 are hydrogen or alkyl radicals containing 1 to 4 carbon atoms, and G is a polymeric backbone comprising carbon-carbon linkages, said vinylidene-terminated polymer containing an average of from about 1.5 to about 4 ##STR26## groups per molecule, wherein said backbone comprising carbon-carbon linkages contains polymerized units of at least one vinylidene monomer having at least one terminal CH.sub.2 .dbd.C<
• group said monomer being selected from the group consisting of (a) monoolefins containing 2 to 14 carbon atoms, (b) dienes containing 4 to 10 carbon atoms, (c) vinyl and allyl esters of carboxylic acids containing 2 to 8 carbon atoms, (d) vinyl and allyl ethers of alkyl radicals containing 1 to 8 carbon atoms, (e) acrylic acids and acrylates having the formula ##STR27## said R.sup.2 being hydrogen or an alkyl radical containing 1 to 3 carbon atoms and said R.sup.3 being hydrogen, an alkyl or hydroxy alkyl radical containing 1 to 18 carbon atoms, or an alkoxyalkyl, alkylthioalkyl or cyanoalkyl radical containing 2 to 12 carbon atoms;
• and
• (2) at least one amine selected from the group consisting of N-(2-aminoethyl) piperazine and 1,3-di-4-piperidylpropane.