Silicone is significantly more stretchy and holds up better to expansion and contraction. But as many have said it is not paintable most of the time, you can find paintable silicon though.

Oh shit, well that halts my own desire to splurge on an SDS for tapcons then. Guess I’ll have to find another use to justify it hahah

I don’t disagree. What I meant though was an SDS results in a better hole for the tapcon and more successful driving. At least that’s what I have been told. As I said I don’t have an SDS

It might be too late for this, but in my own experience fastening to concrete I definitely prefer wedge anchors to tapcons. If you have a nice SDS I am sure that tapcons are lovely, but for my uses I either strip the hole, snap the tapcon, or it drives perfectly. 1 in 3 worked for me so until I started used wedge anchors.