Costar 2k is a two-component waterproofing membrane with tough-elastic properties suitable for both positive and negative side waterproofing of interior and exterior concrete and masonry surfaces.

Application Areas

  • Indoor and Outdoor
  • Horizontal and vertical application
  • All wet areas such as bathrooms, swimming pools, terraces, kitchen, water tanks, balcony, etc


  • Allows the concrete to breathe
  • Can be easily applied on horizontal and vertical surfaces with a brush, roller, trowel or a spraying machine
  • Waterproofs and flexible.
  • It’s elastic and does not shrink or crack
  • Non-poisonous, perfect for water tanks