Mould for silicone sleeve

A simple mould to create a silicone sleeve that you can use creatively for any purpose.

It has 4 holes that you can use to inject material into the mould. Use them to inject a mould release, such as a soap/alcohol mixture to ensure the silicone won't stick.

Then inject silicone using a caulk gun or similar through ONE of the holes (don't switch holes because you'll just trap air) until the entire mould is filled with silicone.

Let it dry/cure for about 24-48 hours. Then break the mould apart carefully to get your silicone product out.