Sealed decks and wet feet
The question I get on every deck job: will it be slippery? The honest answer is that a thick glossy film can be, which is why my usual pool deck recommendation is Trident Cyclone, the natural-look matte. It protects the surface and keeps grip when wet. Where a homeowner wants color enhancement on a deck, we talk through where the water actually goes and choose accordingly, deck by deck, not from a one-size drum.
Deck joints matter doubly because pool decks get hosed, splashed, and rained on constantly. The wash stage takes out the moldy joint sand, SEK ASTM-C144 sand goes back in, and the seal locks it, the same rock solid joint stabilization as everywhere else, doing extra duty around water. Coping and hot tub silicone lines get handled correctly: old failing silicone comes off before sealing rather than being sealed over.

Straight answers
The questions I actually get, answered the way I answer them on the phone.
Will my sealed pool deck be slippery?
Not if the finish is chosen for the job. Matte, natural-look products like Trident Cyclone keep grip when wet, which is why they are my default deck recommendation. This is a conversation before the job, never a surprise after it.
Is my deck travertine or pavers, and does it matter?
It matters a lot. Travertine is porous natural stone and needs a penetrating sealer, never a heavy film. If you are not sure what you have, text me a photo and I will tell you, and the travertine page explains the difference.
Do you handle the deck cleaning too?
Yes, cleaning is stage one of every sealing job, and I keep your pool clean while I do it. See pool deck cleaning.