What was the main condition for a good adhesion I told you?
CLEAN SURFACE!
If you have fingergrease over the copper, you are bonding to the grease, not the metal!
So please try again, this time sand the copper, clean it with alcohol, and apply the silicone inmediately, without touching the parts.
And how do you think is the contact area of my copper cap? It's also 1 mm thick, that's why I reinforced the edge with a thick cord.
You have two flat areas to the sides that provide enough surpface to hold the block parts together, you only need to seal the narrow sides to avoid leaks, not for support.
|