I have a corrugated steel roof where there are exposed bolt heads holding the roof to steel girders in every based channel of the steel (girders are spaced every 4 feet underneath). The bolts and steel washers are sandwiching rubber washers to the roof to help provide a seal, but some washers have deteriorated. Also, in some areas of the roof, there may be 1/16 to 1/4 inch of roof movement from weight of snow, water, wind, etc. Would the coating perform well with those parameters - exposed bolt heads and up to 1/4 in. roof movement?