Peetie Wheatstraw wrote in
:


Seamless alum. gutters were installed maybe 17 years ago on my little
brick bungalow in midwest US.

"Seamless" on the straight lengths. The corner pieces were sealed
with something that looks like caulk inside the gutter.

I noticed one corner leaking the other day. Exactly where it does
the 90 degree turn.

What should I use to re-seal inside the corners? 100% silicone caulk?
Maybe DAP (I won't touch GE)??

Thanks,
Peetie

A small tube of silver gutter goop is what came in a gutter seam package
I recently got. Also picked up a tube of the clear flexible OSI sealant
that was in the link RicodJour provided.

Not sure how the OSI will hold up but I've seen that silver goop around a
long time on some pretty old gutters before they started to leak.