Originally Posted by Thomas G.
I'm interested, too. The big box stores used to carry butyl caulk next to the gutter parts, as it was used to glue eves troughs together. The stuff they sell there now is not identified as butyl.
I was told by my local Ace Lumber supply that Butyl caulk can no longer be sold in NY. They recommended Geocel Water Shield
as a replacement. I used it to fill around some new cables for my inverter & while I don't have any long term results, it dried with a smooth skin & is still flexible after 3 months...