Looking for a sealant for weather stripping

[RCN]

Hi all. Someone on a forum I was looking at back in December was talking about this sealant used to stop water from getting between their side window and the weather stripping. For the life of me I can’t find it and only remember the product name was a Dr. Someone. It’s very thin and liquid that allowed it to creep into the smallest gaps.
Anyone know what I’m talking about and any opinions on this stuff.
Cheers
 

[R0B]

Creeping crack cure.
https://www.ebay.co.uk/sch/i.html?_from ... &_osacat=0

[RCN]

Yep! That’s the stuff I was looking at. Nice one, thank you 

[Oldiebut goodie]

Captain Tolley's.
No good for any gap that you can see, it is intended to creep into cracks by capillary action - for this it is good, have used it for years.