2 methyl phenyl guanidine 2 mercaptobenzothiazole mbt 2 mercaptobenzothiazyl disulfide mbts 2 morpholinodithio benzothiazole disulfide zinc 2 mercaptobenzothiazole and the like dithiocarbamates such as tellirium diethyldithiocarbamate copper dimethyldiothiocarbarnate bismuth dimethyldithiocarbamate cadmium diethyldithiocarbamate lead dimethyldithiocarbamate zinc dibutyldithiocarbamate butyl zimate zinc diethyldithiocarbamate and zinc dimethyldithiocarbamate typically the composition includes from about 0 5 to about 2 0 by weight of accelerator the cure package may also include a small amount of stearic acid about 1 to 2 phr to initiate the vulcanization process the cure package may further include a surface treated activator bik ot available from uniroyal chemical and a substituted diphenylamine antioxidant naugard 445 available from uniroyal chemical the composition may further include conventional fillers such as carbon black ground coal and aluminum silicate other suitable fillers include treated fillers such as calcium stearate treated calcium carbonate which is available from george marble company of tate ga under the designation cs 11 oleic acid may also be included as a wetting agent for the fillers desiccants such as calcium oxide lime may also be included in the composition the composition may also include a rheology modifier such as an organoclay and a wax such as a polyethylene wax the lap edge sealant composition also preferably includes an antioxidant to stabilize the thermoplastic rubber and the copolymer while there are many suitable antioxidants it is preferable to use a phenolic material which is commercially available from the goodyear tire amp rubber company under the product name wingstay l the composition is preferably made by mixing all.