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Your chimney may have a crown that has cracks in it, yet still has a good bond to the brick it was poured upon.

Cracked chimney crown that is still bonded well to the brick.



A great way to remedy this problem, preserve the crown and protect it from future wear is to waterproof it with Tamoseal. Tamoseal is mixed with a mechanical mixer and is brushed on in two applications. The photo below is a of a crown that has been treated with Tamoseal:

Tamoseal brushed onto the crown-2 coats.


TAMOSEAL is a cement-based, polymer-modified material designed to waterproof and decorate concrete and masonry.


  • Waterproofs and decorates
  • Tenacious bond
  • Becomes an integral part of the substrate
  • Durable
  • Breathable
  • Slightly flexible to seal static cracks


  • Concrete and block wall foundations
  • Manholes
  • Water tanks
  • Reservoirs
  • Balconies
  • Interior/exterior

If you want to get technical about it, here is a link to the manufacturer’s data:

Tamoseal technical data

We have used this product for over twenty years, and it works great!