You will create a nasty mess if you aren’t careful. The silicone sticks very aggressively to metal. If you don’t fully cover everything with grease, you will lose an evening scraping and cleaning silicone off. It’s not hard, you just need to be thorough and don’t rush. Each bearing takes a day to cure. Just follow these instructions for the other side once the first is finished. I usually do one after my daily ride, then do the other one after my ride the following day so it doesn’t have to disrupt your routine.
How it works:
You coat everything with grease and then pour in some flowable silicone. The silicone seals in and protects the grease. The grease prevents the silicone from permanently sticking to anything, so you can easily remove it if needed. Your bearings will be kept clean and lubricated from both sides, ensuring the longest life possible for the seals.
Put your board on a secure surface put the included bubble level as shown. Wedge folded paper etc. until it is level. A magazine under each end can act as a good adjustable surface, or a piece of wood.
Use some paper towels to clean the axles and the entire area around the bearings.
The video shows a trick for quickly cleaning out the outer edge of the bearing. Also be sure to clean all the other surfaces that will have grease on them.
Apply grease liberally to the axle, bearing, and the hub as shown.
Bearing should look like this. The axle should be coated about 1/2 inch up. The goal here is to prevent the silicone from sticking permanently to anything.
Don’t move the wheel! 12 hours is usually enough, but if the silicone isn’t fully cured, it will tear apart and you’ll have to start over.
Go slow and be careful. If everything was properly greased, the silicone should release from the axle and turn with the wheel.