Good ways to seal the Backlight from LOCA glue?

Hey everyone!

I've been giving glass-only repairs a try recently, and the only issue I came in contact with was where LOCA glue would enter the backlight of the LCD. I've seen many videos and guides already, and some suggest just using a mold, others say blue tac works well, but there doesn't seem to be a good solution to this yet.

Therefore I wanted to ask if anyone has more experience in this and if anyone has any suggestions.

Yes, I know that OCA exists, but I want to keep the repairs affordable. I have seen an item on eBay which is a LCD backlight sealant (some sort of glue which is put onto the sides of the LCD (http://www.ebay.de/itm/371221025033)) but I have not seen any reviews about it yet. I also tried using electircal tape, but liquids get underneath anyway. Maybe thin double sided sticky tape works? I have also heard people removing the backlight first, but how do you reattach it?

Also little sidenote: Does a LOCA glass replacement work on iPhone 6s too? It should, but since the 6s has 3D touch, this may be a problem.

I would be happy to hear from you guys!