The term 'make leakproof' can be accomplished by two different methods. The first is to SEAL the area, which involves using a material such as rubber or plastic to cover the area and prevent any liquids from entering. The second is to CAULK the area, which involves using a material such as silicone or latex to fill in any gaps or cracks that may be present. Both of these methods are used to ensure that no liquids can enter the area and cause damage.