Triallylcyanurate or triallylisocyanurate based adhesive sealant systems

A liquid adhesive and sealant composition having extended shelf life when exposed to oxygen but capable of rapidly setting at room temperature upon exclusion from contact with oxygen comprising a mixture of a basic monomer selected from the group consisting of triallylcyanurate, triallylisocyanurate and mixtures thereof, a relatively low molecular weight prepolymer which is soluble in the basic monomer to give a liquid composition at storage and use temperatures and is copolymerizable with the basic monomer, said prepolymer comprising from about 15% to about 50% of the adhesive composition by weight, an ethylenically unsaturated diluent monomer which is soluble in the basic monomer and acts as a solvent for said prepolymer and is copolymerizable with both said basic monomer and said prepolymer, at least one polymerization inhibitor, at least one polymerization promotor and a peroxidetype polymerization initiator.