Joyzan Professional Waterproof Paste, Watch Repair Grease Silicone Sealant Box Watch Repairing Paste for Watch Repairing Workers for Watchmakers Watch Gasket Watch Repairing Maintenance

So far, this has worked extremely well in my applications. Simple design is as easy to use as to just drop the watch seal into it and then close it up - set it aside as you finish your work. It's silicone lubricant is like a thick oil, light grease. It gets those seals all wet, sticky and well covered before you send the watch into the press to seal your pop-lids. It's slippery, sticky stuff - it stays put even when you re-seal a screw back case watch. It simplifies closing up watches due to the lubrication it provides, no pinched seal - even if old and a little dry. New seals just slip together in case backs without a second thought. I couldn't ask for more. It's of a generous size and quantity of lubricant that you can see "pooling" in the bottom half. It's size is such that even the most monstrous wristwatch seal can be treated before installation. The goopiness of the silicon oil also helps preserve water resist watches' integrity if exposed to water. By insuring the seals are conditioned and, the extra layer of silicon helps ensure the seal goes in straight and true.

Received product as described.

Exactly what I was looking for to grease the gasket on my G-Shock watches

Using the watch gasket past applied a light coat of paste when you follow the how to use the paste video. The new gasket with paste applied gave an old 11 year old electric Seiko new water resistance and working again with a new battery.

Product seems ok and as described and expected but, since I've not used it yet, I can't say much else. It was as described and arrived on time.