Articles and methods for reactive compositions

An article useful for containing plural components of a mixture in distinct compartments and their subsequent mixing within said article, comprising:

• a first layer of material;
• a second layer of material sealingly attached to said first layer along a first seal;
• and
• a frangible seal along which said first layer of material is sealingly attached to said second layer of material,
• said frangible seal being configured and located sufficiently to define a first pouch having a first interior volume and at least a second pouch having a second interior volume in said article, said first pouch containing a first substance and said second pouch containing a second substance that is chemically reactive towards said first substance, said substances yielding upon their admixture a mixed composition from which a cured polymeric material selected from the group consisting of:
• polyurethane polymers, polyurea polymers, epoxy polymers, acrylic polymers, and polyaspartic polymers may be provided, wherein the strength of said frangible seal is less than that of said first seal by an amount sufficient to enable a person to apply pressure to one of said pouches causing rupture of said frangible seal and admixture of said first and said substances, without causing said first seal to rupture, and wherein said first seal has a strength sufficient to not be ruptured until a pressure differential of at least 7.5 psi is caused to exist between a volume within said article and ambient pressure.