4028 Fan Gasket

This mold will allow you to create a gasket for the 4028 fan. 

Use M3x10mm bolts/nuts to secure the 2 parts together.

By doing so 2 holes will remain. on 1 end insert a syringe, I used a 20ml syringe for this.
simply mix up your silicon, suck it into the syringe. Insert the syringe in one of the holes and simply push until the silicon starts coming out on the other hole