How Often Should Sealant Be Replaced? | G1 Sealant Glasgow

Sealant plays a vital role in protecting your bathroom, kitchen and other wet areas from water damage.

Over time, however, even the best silicone will break down. A common question homeowners ask is: how often should sealant be replaced? The short answer is usually every 5 to 10 years, but this can vary depending on conditions, use and installation quality.

In this guide, G1 Sealant explains exactly when sealant should be replaced, the warning signs to look out for, and how to avoid costly water damage.

What Is the Typical Lifespan of Sealant?

Most modern silicone sealants are designed to last between 5 and 10 years. In low-use areas with good ventilation, sealant can last closer to the 10-year mark. In busy bathrooms and showers with frequent moisture exposure, it may need replacing closer to every 5 years.

Factors that affect sealant lifespan include:

The more often an area is used and exposed to water, the faster the sealant will wear and deteriorate.
Trapped moisture from steam and condensation accelerates mould growth and breaks down silicone over time.
Cheaper sealants tend to shrink, crack and discolour much sooner than professional-grade products.
Poor surface preparation or uneven application prevents proper bonding and drastically shortens sealant life.
Strong chemical cleaners can erode the silicone surface, causing it to become brittle and fail early.

Signs Your Sealant Needs Replacing

If you're unsure whether your sealant is failing, look out for these common warning signs:

Persistent black staining usually means the sealant has been compromised and mould has penetrated deep into the silicone.
Even small cracks allow water to seep behind surfaces, leading to hidden moisture damage.
When sealant pulls away from tiles, baths or trays, it can no longer form a watertight barrier.
Once water gets behind surfaces, it can cause damp, rot and costly structural issues.

How Often Should Bathroom & Shower Sealant Be Replaced?

In bathrooms and showers, sealant typically needs replacing every 5 to 7 years due to daily moisture and heat. These areas are the most vulnerable to mould growth and sealant failure.

For kitchens, sink and splashback sealant often lasts slightly longer — usually around 7 to 10 years, depending on water exposure and cleaning habits.

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If your sealant is mouldy, cracked or lifting, don’t wait for water damage to start.
Contact G1 Sealant today for a free, no-obligation quote in Glasgow.

Professional Sealant Replacement in Glasgow

At G1 Sealant, we specialise in domestic and commercial sealant replacement across Glasgow. From shower resealing and bath sealant replacement to full commercial projects, we deliver long-lasting, clean and professional finishes.

If you’re unsure whether your sealant needs replacing, we’re happy to assess the condition and offer honest advice.