First, if have a yoyojam yoyo that is very responsive and you want it unresponsive, clean and lube the bearing. Use yoyojam thin lube for it to be unresponsive. Thick lube for responsive. How to Clean Your YoYo Bearing - Yo-Yo Mods and Maintenance - YoYoExpert This is a great ball bearing guide.
This guide will work with not just yoyojams, but with any factory. The silicone requires a groove.
I did not make the videos, so I don’t deserve credit for the videos. This is just a guide to help beginners.
You have pressure RTV Gasket down and then scope some out with the tip of a spoon. For Flowable all you have to do is fill the groove and take the access silicone away with the side of a credit card. The silicone fills the air bubbles and falls in.
And actually you don’t want to “concave” with the RTV silicone.
Once you put the RTV in, you want to take a needle or something to get all of the air bubbles out, and then let it cure. Once it’s cured, you can take some of it off with a utility knife or something. It’ll last much much longer if you do it this way.