Primer and sealant for glass and coated metal

A method for joining and sealing a coated metal surface to a glass surface which comprises:

• (a) applying a primer to said metal surface and said glass surface, said primer comprising a dispersion of 10 to 20 parts by weight of a linear polyester resin, 4 to 5 parts by weight of a polyisocyanate cross-linking agent, 3 to 9 parts by weight of carbon black, and 66 to 83 parts by weight of a volatile organic solvent;
• (b) applying a sealant to either said primed glass surface or said primed coated metal surface, said sealant comprising a mixture of:
• (1) a prepolymer comprising a polyethylene oxide polypropylene oxide ether diol and diphenyl methane diisocyanate which has 3 to 15 percent free isocyanate groups;
• and
• (2) a curative comprising 20 to 40 parts by weight polyethylene oxide polypropylene oxide ether diol, 20 to 40 parts by weight polyethylene oxide polypropylene oxide ether triol, 15 to 60 parts by weight filler, 0.5 to 1.5 parts by weight diamine and catalytic amounts of an organotin catalyst, the weight ratio of said prepolymer to said curative ranging from 1:1 to 1:2, and
• (c) joining the metal and glass prepared in steps (a) and (b).