Which Sikaflex

[GreasyJoe]

Am replacing the outer rear light panel covers which sit over the light clusters.
Before I start I need to buy some sealant. To keep it simple product wise, I’m going to go with Sikaflex. Trouble is there’s so many variations that could do the same thing. 221 seems to be all over eBay but there’s other versions they do as well like 522, 512…. I’m assuming I’d be looking at one the cures rather than is permanently tacky, though allow me to separate them if I need to at a future time.
Any recommendations as to which type.

[Graaf]

If it’s the clear cover does that not just clip on?

[GreasyJoe]

If it’s the clear cover does that not just clip on?

Ah yes noticed some clips. Maybe one missing. Previous owner may have sealed it due crack or missing clip. I’ll check out the other side and see if that was sealed too.

Be handy to know which type Sikaflex people use in general as likely be some other jobs