Two weeks ago I took a 5mm soda-lime glass piece and spread some aquarium 100% silicone sealant on it.
2 pieces – 5mm 150mmx150mm ordinary glass
2 pieces – 10mm 110mmx70mm ordinary glass
1 tube of 100% Aquarium silicone.
1 piece of heat shrink wrap large enough to cover 150mmx150mm and have a margin of about 3cm on all sides.
Spread silicone and cover with shrink wrap place the other 150mmx150mm glass on top and use the 10mm to spread the load and clamp.
If you get bubbles peel and start again. Detailed instructions available at the ChemShapes site HERE
Leave untouched for 2 weeks.
Today – Carefully removed the 10mm glass and clamps. Clamped on one of the 10mm pieces for a few hours to make sure silicone has cured – only to check.
Guess not. But a few hours later I managed to peel off the shrink wrap from the silicone and left it to set.
Some things take time, so prepare and experiment early on to be able to have something useful at the right time.
I have spread some silicone on a glass piece and placed 4 different foils on it. I placed another thick glass on top and clamped down. Left it for 2 days.
From Left to Right below:
Window PVC Foil, Backing foil from PVC Foil, Flower cellophane foil and A3 blueprints protector sheets.
The A3 blueprints protector is quite thick. It cured on the sides but in the center it stayed a little wet after 2 days:
The Flower Cellophane foil was next and the silicone DID NOT dry at all. It stayed wet and sticky:
The PVC Foil Backing was next. I could not get it peeled off.The silicone was solidly stuck to the foil and glass:
Next was the PVC backing itself. It is textured on one side and absolutely smooth on the other:
IT WAS PERFECT! The silicone has dried underneath and was easy to peel off. The surface was smooth and as you will see perfectly transparent:
The PVC Foil looks like this:
It is used as a security foil or when you need to texture the glass on your windows. I have bought it from Mr Bricolage, but it is available in Praktiker or other stores. In the US you should be able to find something similar in Lowe’s, Home Depot or Ace Hardware .
I will be coating the regular sized 150mm X 150mm glass with silicone next.