Travertine sealing on the Northern Beaches
Unsealed travertine beside a salt pool or above the surf absorbs salty water, and the salt that stays behind slowly breaks up the surface. A breathable penetrating sealer is the most effective defence.
Salt attack on travertine starts quietly. Pool water or sea spray soaks into the stone, the water evaporates on a warm afternoon, and salt crystals grow inside the pores. Repeat that through a few summers and the waterline edge of the coping begins to pit, flake or turn sugary. On the Northern Beaches, terraces that face the ocean see the same process without any pool at all, because onshore winds carry spray a long way up the slope. Sealing does not make travertine immune, but it slows the uptake of salty water enough to change how the stone ages.
Our sealers for travertine are impregnators formulated for limestone and for salty conditions. They sit inside the stone rather than on top, so the surface keeps its natural texture and grip, which matters on pool decks and wet steps. Glossy topical coatings are not used outdoors, because they trap moisture, cloud over and turn slippery. If you prefer a deeper tone, an enhancing impregnator can draw out the walnut and silver in many travertines. Our technicians put down a test patch first, since enhancement is a lasting change to the look until it wears.
Preparation is most of the job. The stone gets an acid-free clean to remove scale, grime and growth, any open holes are filled flush in a matching shade, and the deck is given proper time to dry. Coping beside a full pool holds water, and coastal mornings can be damp, so we check moisture rather than seal to a timetable. Thin coats of sealer go on, and whatever the stone does not absorb is wiped away. We record the product and date, tell you when swimming and furniture can return, and recommend a quick water-drop test on the coping once a year.
See the full method on our travertine sealing page.
Travertine cleaning & sealing by suburb
Frequently asked questions
Straight answers from our stone-care technicians.
How often should travertine near the ocean be re-sealed?
Sooner than paving in a sheltered spot. Check pool coping and ocean-facing terraces every year. When water drops soak in rather than bead, protection has dropped off and it is time to re-seal that area.
Will sealing make our pool surround slippery?
Not with the sealers we use. Penetrating impregnators sit inside the pores instead of on top, so the surface feels the same underfoot. Slippery surfaces usually come from glossy topical coatings, which we do not use outdoors.
Our coping is already flaking. Is it too late to seal?
Sealing will slow further damage but cannot rebuild lost surface. Lightly affected coping can be honed and sealed. Badly spalled pieces may need replacing by a tiler or pool builder first, and we will tell you which pieces those are.
Can you seal travertine without draining the pool?
Yes. We work from the deck side and protect the water. A drained pool does make it easier to reach the inside face and nose of the coping, which makes a pool renovation a sensible moment to book sealing.