I have wanted silicone liners for my wooden moulds for a very long time as I am so sick of lining them with paper or plastic. No mater how easy it is to line them it still takes time! The only problem is you have to make a box that just fits into your mould leaving a 0.5-0.8cm space around the box so you can pour the silicone in. See this link from Amanda Griffen on how to make a mould. It is an eBook but looks really good. This is a real problem for me as I have quite a few different mould sizes and really did not want to make loads of boxes to fit. Too much work and then wasted wood when I was finished. I had to come up with a clever plan. And I think I did. I hope it helps all you you out there. It takes a little longer to do than the box in a box method. We will make the sides first then make the base afterwards.
You will need
Some Silicone to mix up. I used Mould Max 30 from AMT Composites.
A stick to stir it
A small stick like a skewer to fill in the sides
Metal clips/ grips
Make sure you have made the box/ sides that you will pour the silicone into. I used a huge tile and wood clamped together. Measure your moulds to make sure that you make the box the correct size. i.e. if your mould length is 60x10x10 high and you only make the box 50cm it will not be long enough for the longest side.
If the corners are not adequately stuck then the next time you mix silicone just reapply to the corners.
This is not as neat and perfect as the box method but I prefer it (because I came up with the idea ha ha) because it saves me having to make the boxes to fit inside the moulds which would take time and money.
That is it - easy peesy. I have now done all my moulds and I will never have to line them again - YAY! I hope this makes sense and helps you all out there.