[jgb7038]

I use alot of the 3m 08310 and 08308. Both are 2 part sealers. The 08310 is a direct to metal product but works well over primers and sealer. It is a very light cream color,its almost see through. The 08308 is made to go over sealers,and primers but not direct to metal. It is black.

I use both at work, and on my personal projects. I think the work time is some where in the 15 minute range,but would have to check the data sheets. You can use 3m general purpose adhesive remover on you finger to smooth the 08308 out as your working it if you are doing larger areas,I know this works,it also lets you work it a little longer as well.You just have to use small amounts of the remover,basically getting the tip of your finger wet is all it takes to smooth it out if you need to.

They both work very well on vertical and over head joints. They also will not shrink. I had some of the one part 3m sealer shrink and crack on my drip rail of my panel truck.

I do know that the cost is a little more for the product,but it is well worth it. You do have to use a special gun for them,but they have gotten way down on price in recent years, I have run across deals on some of the sites where you can get a gun and a tube of product for about $50. There is a whole line of other products that the gun can be used for also.

I dont know if that's the kind of answer your looking for,but maybe it will help.