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It’s one of the most common questions we get before a job: will the epoxy change what my shower looks like? The short answer is no. Here’s the longer version — including exactly what happens on the day and what to expect when the job is complete.

What Epoxy Sealing Actually Does

Epoxy shower sealing is not a surface coating. It doesn’t get painted or sprayed over your tiles. It’s applied specifically to the grout lines and silicone joints — the areas where water penetrates.

A two-part commercial-grade epoxy compound is flooded into the grout lines, where it soaks into the substrate and cures to form a watertight, chemically bonded seal. The tile faces are cleaned throughout the process, not coated.

What the Process Looks Like on the Day

  1. Preparation — The shower is thoroughly cleaned, existing silicone is removed, and grout lines are cleaned back to a sound substrate.
  2. Application — The two-part epoxy is mixed and carefully applied to all grout lines and joints in the wet area using precision tools to avoid contact with the tile face.
  3. Clean-up — Any epoxy that reaches the tile surface is removed before curing. Tiles are left clean.
  4. Curing — The epoxy cures over 24–48 hours. The shower must remain dry and unused during this time.
  5. Completion — Once cured, the shower is sealed, watertight, and ready for use. Your written warranty certificate is issued at this point.

What Stays Exactly the Same

What Might Actually Look Better

Many customers comment that the shower looks noticeably cleaner after the job — not different, just clean. This is a byproduct of the preparation process. Old black or discoloured grout is cleaned back, deteriorated silicone is replaced with fresh silicone, and the grout lines end up clean and uniform in colour.

If your grout has discoloured over the years, the result is often a shower that looks almost new — without a single tile being touched.

Is It Right for My Shower?

Epoxy sealing works on most standard tile-and-grout showers. The main requirement is that tiles are structurally sound — properly adhered to the wall and not hollow or crumbling. If you’re unsure whether your shower is suitable, book a free assessment. We’ll inspect the shower and give you an honest answer, with no obligation.

If you’ve had your shower re-grouted and it started leaking again within a year, you’re not alone — and it’s not a coincidence. Re-grouting is one of the most commonly sold shower repair solutions in Perth. It’s also one of the most commonly repeated ones. Here’s why.

The Problem With Re-Grouting

When a shower leaks, most tradies go straight for the grout. They scrape out the old, cracked lines, apply fresh grout, and call it done. It looks good for a few months. Then the leaking starts again.

The reason? Water doesn’t care about surface-level fixes.

Once water has been getting behind your tiles, it’s already in the substrate — the concrete base and the adhesive bed beneath the tiles. New grout on top of a wet substrate is doomed from the start. Within months, the movement of hot water, steam, and thermal expansion causes that fresh grout to crack right open. You’re back to square one. Except now you’ve paid for a repair that didn’t work.

Why the Cycle Keeps Repeating

The root cause of most shower leaks isn’t cracked grout — it’s the silicone joints at the corners and the grout lines in the wet zone that have deteriorated over time.

Standard grout is a porous, rigid material. It’s fine for filling gaps between tiles on a dry surface. In a shower — with daily temperature changes, chemical cleaners, and constant moisture — it’s under enormous stress. No grout job lasts forever in a wet area.

More critically, re-grouting only works on the surface. It can’t seal what’s already penetrated behind the tiles. And if water has already infiltrated the substrate, the problem won’t stop until the substrate itself is sealed.

What Actually Works

Professional-grade epoxy shower sealing addresses the problem at the source.

Rather than replacing surface grout, the epoxy system is flooded into the grout lines and silicone joints, penetrating and bonding within the substrate itself. It cures to form a watertight, chemically bonded seal from the inside out — not a surface coating that can peel or crack.

Epoxy is also non-porous and flexible, which means it handles the thermal movement of hot showers without cracking. Where grout eventually fails under the stress of daily use, epoxy holds.

Not All Epoxy Products Are Equal

Consumer-grade epoxy coatings — the kind available at hardware stores — are surface applications that sit on top of the tile face. They peel off within a year or two.

Professional-grade shower sealing uses a commercial-specification two-part epoxy system, applied by a trained technician. This is what we use at Surface Seal Australia — the same product used in commercial and hospitality applications where showers get heavy daily use and need to last a decade.

The Bottom Line

If you’ve had your shower re-grouted more than once and it’s still leaking, the problem isn’t the tradesperson — it’s the method. Re-grouting is the wrong tool for a substrate leak.

Epoxy sealing costs a fraction of a full retile, is completed in a single visit, and comes with a 10-year written warranty. If you’re tired of fixing the same problem over and over, book a free assessment and we’ll tell you honestly whether epoxy is the right fix for your shower.