Sylglas sylwt506 waterproof tape is purposely designed as a permanent leak sealant for piping and tanks and can be used on most materials the wt506 is translucent and offers a multitude of uses around the home and garden with an effective adhesive for most metals wood ceramics fibreglass some hard plastics plaster masonry and concrete this waterproof tape will form a strong waterproof self adhesive seal other tapes will yellow and go brittle in sunlight not this one as it is uv stable and flex