Buildmat recommends using Shower Plug as a sealer on concrete basins as it is easy to apply and will last. 

Shower Plug is an advanced waterproofing sealant for tiles, grout and all masonry surfaces. It is a clear liquid that is brushed onto tiles and grout and then wiped away, in one simple application.

Shower Plug is used for:

• Fixing and preventing shower leaks without removing the tiles
• Mould prevention
• Preventing efflorescence on tiles and all masonry
• Making tiles and grout easier to clean.

With a simple application method and high-grade formulation, Shower Plug is ideal for DIY and professional users alike. It is relied upon for waterproofing showers, balconies, driveways and building facades, in DIY, commercial and federal applications around the world.

Shower Plug is 100% UV-resistant. It can be used indoors and outdoors. Once application is complete, Shower Plug leaves an invisible finish.