Pool mottling the variations in the color of cement or pool plaster is a common concern among pool owners and pool remodelers alike.
What is mottling of pool plaster.
The only thing.
One common cause of plaster deterioration is improper pool water chemistry.
The concrete cement industry has determined that late hard troweling can cause cement concrete white or gray surfaces to darken mottle and become spotted.
Or use a pool plaster repair kit like our ez patch pool plaster with bonding additive.
Again this slight difference still has to do with the fact that plaster is made of a mixture of water cement and aggregate and is a hand crafted product.
First of all you are talking about two absolutely totally 100 different things.
Mottling is an inherint characteristic of any colored or even white plaster.
There is also normal mottling of plaster where the white plaster surface has very slight shade differences from one white area to another.
One of several factors may be the culprit.
So what causes plaster damage like stains streaks erosion etching pitting mottling discoloration and hairline cracks.
There is nothing wrong with your plaster.
Even the cal poly npirc test pool studies on color pigments provided confirming results.
Follow the magic marcite pool water chemistry letter without fail for the first 12 months of your pool finish life.
It is normal and unavoidable.
But adding calcium chloride cc to a color pigmented plaster can also lead to blotchiness and mottling which pigment manufacturers and the portland cement association pca warn about.
This should be under warranty and no charge to home owner.
For your pool plaster supplies pour in premixed white portland cement and marble dust.
While pool mottling may sound.
The pool may need to be left empty a day or 2 to air dry.
Etching is deterioration of plaster due to water chemistry.
Gray or grey mottled discoloration also known as water entrapment or hydration is difficult to remove may be remedied by.
Use the bonding additive to mix the plaster with and wet the area to be patched.
What causes that to happen.
Discolorations new pool plaster can discolor darken or turn gray from adding excessive calcium chloride set accelerator from late hard troweling from thin and thick areas due to an uneven shell etc.
White pool plaster sometimes becomes a mottled gray or grey color either immediately or a few months after the new plaster pool is filled with water.
Ranging from unnoticeable to severe the mottling of pool finishes like quartz and plaster as well as cement decks is unpredictable and can happen to any pool.
Out of balance pool water chemistry.
In some cases chemical balances may be off when a new pool is.
It is not caused by improper water chemistry.
