Resistance to chlorinated water, other pool chemicals, other abuse :
The goal is to protect the paving. If the sealer was to be effected, it can be replaced relatively easily. If this is a concern, the sealers most resistant to all pool chemicals are the sealers in the "penetrating, solvent base
" catagory. See 
Extreme hard water deposits on the waterline tile:
Some areas of the country have such hard water that these deposits have to be machine ground off every year. Some suggestions are:
Try 
Grout Restoration first.
If you need something even stronger
,
Grout Residue
Remover is as strong as you can and should use in this environment.
If that is still not sufficient and grinding is needed, consider applying
S-B-S Sealer
to the tile after it is clean. This will provide a good looking coating on the glazed tile that can be stripped with
lacquer thinner when the water deposit buildup must be removed. Providing the lacquer thinner and residue is kept out of the water, this should be much easier and cost effective, with no potential damage to the tile face from grinders.
Sealing materials in an environment of chlorine and muriatic acid spillage.
Use the appropriate solvent base penetrating sealer. The other types of sealers have more risk of reaction around these harsh chemicals. Stay with a no gloss type application to achieve the maximum slip resistance.
Efflorescence (white powdery stains) on brick coping and paving.
This is caused by the water soaking into the brick and paving, followed by evaporation bringing salts to the surface. See the 
section on Efflorescence.
Salt water pool issues:
Salt water crystal can build up below the surface of soft/absorbent surfaces and create pressure that can make the surface flake and powder. Test one or both of these sealers to overcome this situation
with deep penetration to keep salt and water out of the soft surfacing.
Slippery when wet:
First of all, any paving should be of a type that has enough texture to provide traction.
When sealing this paving, test a sealer and application technique that will not build enough gloss to reduce that texture to a level that makes it dangerous. See 
and for sealers to test.
Chemical products getting in the water?: (Refers to any kind of water)
Don't allow it to happen. Depending on what chemical products are being used, they could hurt pumps or cause other problems or reactions. We do not know of any techniques for preventing this beyond common sense and caution.
