Best chain cleaning agent? Tire sealant?

[Beck1976]

Any recommendations for cleaning agent to use, when cleaning chain, sprockets etc?

 

Back home I would usually get busy with an old toothbrush and a liquid based on n-heptan (and then dry it of and apply wd-40 or similar). But I havent been able to find any comparable cleaning agent here, any suggestions?

 

Would basic nailpolish remover/acetone do the same trick?

 

Also, Im looking to buy a can of foam tire sealant. Often ride when its dark, and dont want to big a hassle fixing a flat, if I cant see anything ? Never used sealant foam before though, any recommendations? 
saw this one on Lazada, but whether its better or worse than any other brand, no idea

https://www.lazada.co.th/products/pvent-130-i100208458-s100247730.html?spm=a2o4m.searchlist.list.19.5ee018272POWnW&search=1

[Puwa]

I use kerosene to clean chains. It's cheap, easily available, and leaves a slight protective coating. Remove the chain (with a smartlink or equivalent), tie dental floss to one end, then lower into an old plastic bottle with a few ounces of kerosene. close lid tightly (over the protruding floss), shake for a few seconds, let stand a couple of minutes, remove chain, rinse with water, hang to dry). if you're careful you can use the same few ounces for a few cleanings.

[rebo]

Exactly!
That's how it works.
I don't rinse with water, instead I blow the kerosene and remaining dirt out with compressor.