Injection molding is simply forcing a melted thermoplastic into a mold of some sort, letting it cool, and then prying the mold apart to get to the finished piece. Hot glue guns are basically handheld ...

Note: For less flexible baseboard, the best solution is to simply fill any gaps with caulk. Select a premium acrylic latex caulk ($3-plus per tube) that says “paintable” on the label. Force the caulk ...