Understanding the Silestone 25-Year Warranty

By Tudor Granite, Worktop Specialist | Updated: October 2025 | Reading time: 4 minutes

The 25-year warranty is a major selling point for Silestone and a key reason we trust the brand, as mentioned in our main review of Silestone. But what does it mean in practice? This guide breaks down the small print to give you a clear, honest understanding of what is and isn't covered.

What IS Covered by the Silestone Warranty?

The warranty provides coverage against manufacturing defects in the Silestone slab itself. It's a promise from the manufacturer, Cosentino, that the product you receive is free from flaws that occurred during its production.

Examples of a potential manufacturing defect could include:

• A section of the slab having inconsistent colouring that is clearly not part of the intended design.
• Unusual pitting or blemishes that are not a characteristic of that particular quartz style.
• A structural failure of the material under normal household use that cannot be attributed to an external cause.

Essentially, the warranty protects you from the rare event that you receive a faulty product from the factory.

What IS NOT Covered by the Warranty?

This is the most critical part for homeowners to understand. The warranty does not act as an insurance policy against damage that occurs in your home. It does not cover:

• Accidental Damage: This includes chips, scratches, or cracks that result from impacts (e.g., dropping a heavy pan) or improper use. This is considered normal wear and tear.
• Heat Damage: The warranty will not cover damage (discoloration or cracking) caused by placing items of excessive heat directly on the surface. Always use trivets.
• Chemical Damage: Damage from using harsh, unapproved chemicals (like bleach or oven cleaner) is not covered.
• Damage from Improper Installation: If the worktop is not installed correctly by a certified fabricator, any resulting issues will not be covered. This is why using an approved and experienced installer like Tudor Granite is so important, as our workmanship is guaranteed separately.
• Outdoor Use: Standard Silestone is not warrantied for outdoor use, as exposure to UV light can cause fading over time.

How Do You Activate the Warranty?

This is a crucial step. To be valid, you must register your worktop on the Silestone website within 6 months of installation. Your installer will provide you with the necessary batch numbers and details from the slab to complete this simple online form. It's free to do and essential for securing your coverage.

Conclusion: It's a Guarantee of Quality, Not an Insurance Policy

Think of the Silestone warranty as a powerful assurance of the material's quality from the moment it leaves the factory. It gives you confidence that you are investing in a top-tier product that is free from hidden flaws. For protecting your worktop against the accidents of daily life, following the correct care and maintenance advice is your best insurance.