[85RedCarrera]

The primary issue that I have with some silicone products on aluminum is when it’s time to remove it- so I don’t use some products anywhere I might be going back into anytime in the ‘foreseeable’ future. Most Silicone on steel is no biggie- just get a brass brush and it’ll all come off.

Dirko required Digesil (best product ever for removing all traces of silicone) to Get it completely off the aluminum. Acetone was useless.

On my Ducatis, the Threebond type products are easy to remove- and then Acetone removes every trace of it. Not so with the Dirko- extremely tenacious stuff…. And I expect that that is desirable, as the bead after squeeze out inside the case seems firm and well adhered, so that it won’t sprout legs and walk through the engine.

I must admit though, getting the squeeze out with Dirko exactly where you want it to be, depends on the flange width and the amount applied, and I am used to using the Threebond type products on narrow flanges, and you don’t need much product at all in that scenario.

The first Porsche case I sealed with Dirko could have used a bit more than I applied, as I was just a hair less than the squeeze out that I wanted. It’s cleaned up now and I’ll be sealing it again soon. Next time I use Dirko I expect I’ll get it just right. Using New products sometimes require a practice session..!