An interesting article on SWG pools and deck sealers. Silane & siloxane based sealers seem to prevail.
https://www.concretedecor.net/decorativeconcretearticles/vol-14-no-2-feb-mar-2014/the-pool-water-problem-are-there-compatibility-issues-between-decorative-concrete-and-salt-chlorinated-swimming-pools/
https://www.concretedecor.net/decorativeconcretearticles/vol-14-no-2-feb-mar-2014/the-pool-water-problem-are-there-compatibility-issues-between-decorative-concrete-and-salt-chlorinated-swimming-pools/