Although many who read this especially those that install salt water pools will strongly disagree with this blog. I have been writing these types of informative articles for years now with my attempt to save both consumers and installers allot of unnecessary problems due to lack of proper installation practices or misinformation.
It seems that the water from salt water pools compromises the sealer used or if sealer is stripped and resealed the salt that has gotten into the unprotected stamped concrete once sealed over is sealed in and as water from below pushes the salt up under the sealer and you get a blushing condition similar to that of water being trapped as described in earlier posts.
- See letter below from EZChem
In regards to EZChem’s Perma-Pro Klear Koat VOC sealers and cure n seals, we have been manufacturing these great coatings for years with no problems. We sell a tremendous amount of these products both under our brand Perma-Pro and under private label in your area. After talking with you about your problem and you brought up salt water pools, I knew you had fallen victim to a problem contractors and home owners all over the country are having with salt water pools.
Since salt water pools produce chlorine, chloride damage accelerates the destruction of stone and cement. This also includes sealers placed over the stone or cement. Caustic Soda or Sodium Hydroxide is the other byproduct of this chemical manufacturing process. This caustic chemical is the main ingredient in Drano or Liquid Plumber. So, you can see the problems such as discoloration, whiting (blushing), scaling and de-bonding concrete products and sealers that surround the deck of the pool.
Unfortunately, there is a lot of misinformation in the marketing of salt water pools. People have no idea how corrosive and how many problems they cause. The bottom line is the sealer or your application of the sealer is not the problem. Using our sealers or any other sealer on new construction prior to the pool being filled and the chemical process being started will work in most cases, but the real problems occur when re-applying sealers or making repairs to the pool deck because of contamination of the chemicals outlined above.
Robert Levetan, PhD.
Lab director / Ezchem, Inc.