Silicone caulk is a versatile sealant that we can use to plug virtually every gap and seal, like the base of bathroom fixtures, kitchen worktops, and drafty doors and windows. However, if you've ever ...

The casting material is cheap silicone caulking from a hardware store, and color can be added with a small amount of cheap acrylic paint. A few drops of glycerin added to the silicone thins it out ...