Also available in a spray bomb. The stuff was created by Rolls Royce for turbine engines, but being a very good product it got popular everywhere quickly.I highly recommend Hylomar Blue gasket sealant on both sides of any gasket. It seals like an RTV but never hardens and gaskets can be removed without being scraped off in chunks. I frequently reuse gaskets installed using Hylomar Blue. It is sensor safe and can be used around fuel-say carb gaskets.
It’s great for holding gaskets in place while installing parts and won’t create issues if you make a mess, just wipes off with a rag.
Works great with o ring style gaskets, holds them in the grooves while you install your parts, no worries about the gasket not being seated.
It was developed for the aircraft engine industry. I’ve seen it supplied with new gaskets in my Evinrude, mercury, and Yamaha outboards (with their own brand on the package) and Chrysler have it with a part number as well.
Its consistency is like tooth paste out of the tube, it stiffens up a bit after application but never hardens. Available on eBay, Amazon, Grainger, and numerous other places if you search online.
Would work well on the rough surface of the Chinese part after a bit of smoothing with sandpaper.