Trim sealant, What is being used? Options

[Morph914]

I am getting the targa trim pieces ready for reinstall and am wondering what is being used to duplicate this sealant on the backside of a lot of the trim. I was very impressed at how soft and pliable this original sealant was after 48 years or so.

Thanks in advance,
John

[wonkipop]

sikaflex is a butyl based sealant.
been widely used in the building industry for half a century.
stays flexible for a long time as it skins over only on surface exposed to air.
is black.
sticks like (IMG:style_emoticons/default/stromberg.gif) to a blanket.
i'm guessing that is what stuff still on trims might be.

there is also another sealant that was used in the 70s for glazing in buildings.
even today when you pull 70s glazing apart it is still flexible, sticky and liquid almost.
its got a name? and i think it is referred to as mastik these days.
but it did have a different name back then.
it doesn't cure over time and go hard like modern silicone based sealants.
its real messy stuff.

sikaflex can also be pretty messy if you are not careful.
though usually you can use water to wipe it clean.
usually applied using a glove with a bucket of water (with a tiny bit of detergent mixed) beside you to finger work it then sort of wipe it clean.