What type of sealant is resistant to chlorine for use in swimming pools?
Try this:
http://www.laticrete.com/Architects/TechnicalDesignManuals/tabid/1655/Default.aspx
It’s a Laticrete manual…
Try the old polysulfides that have fallen out of favor but were the equivalent of silicone sealants before the latter became available.
Polysulfides can be immersed and are used to seal pool copings so I’d think that they’re not affected by chlorine; they’re not at my house anyway.
From a friend who designs pools (think Olympics, not backyard): We specify two part polysulfide, WR Meadows “deck o seal” or similar.