Grout and silicone
What lasts longest, when to use each, and how to avoid discolouration.
At a glance
Quick Checklist
Key points at a glance
- 1Never use grout in corners - always silicone
- 2Epoxy grout lasts longest but costs more
- 3Match silicone colour to grout
- 4Anti-mould silicone for wet areas
- 5Allow proper curing time
Questions to ask your installer
Take these to your next conversation with your fitter
- 1What type of grout will you use in the wet areas?
- 2Will you use silicone in all corners and perimeters?
- 3What brand of silicone and is it anti-mould rated?
- 4How long before the shower can be used?
- 5Will you seal the grout once it's cured?
- 6What's the best way to maintain the grout long-term?
💡 Tip: A good installer will welcome these questions. If they dismiss them, that's a red flag.
💡Myth vs Reality
Common Myth
"White grout looks cleanest"
The Reality
It shows every mark and stain. Light grey or grout matching the tile is more practical.
Common Myth
"All silicone is the same"
The Reality
Cheap silicone goes mouldy in months. Quality sanitary silicone stays clean for years.
What to look for
- •Grout type: cement (standard), polymer (better), epoxy (best) for wet areas
- •Silicone: sanitary grade with anti-fungal properties
- •Colour matching between grout and silicone
- •UV resistance for areas with natural light
Common mistakes
- •Using grout in movement joints where silicone is needed
- •Choosing white grout on floors (shows dirt quickly)
- •Not sealing cement-based grout
- •Using cheap silicone that goes mouldy within months
Quality considerations
- •Epoxy grout is virtually stain-proof and doesn't need sealing
- •Quality sanitary silicone has 10+ year mould resistance
- •Colour consistency between batches is better with premium brands
- •Some grouts have built-in antimicrobial protection
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This guide is written to help you make informed decisions, not to sell you anything. Always discuss your specific situation with a qualified installer.