The main differences between water-based and solvent-based sealers for interlock pavers lie in their composition, appearance, and application characteristics:

• Water-Based Sealers: These sealers are typically less harsh and have a lower VOC (volatile organic compound) content, making them more environmentally friendly and safer to use. They often have a milder odour compared to solvent-based sealers. Water-based sealers provide a more natural finish, which can range from matte to a slight sheen. They are generally easier to clean up with water, making them convenient for DIY applications. However, water-based sealers may require more frequent reapplication and may be more expensive compared to solvent-based options.
• Solvent-Based Sealers: These sealers tend to penetrate deeper into the paver surface, providing a more durable and longer-lasting protective layer. They often enhance the colour of the pavers more vividly, giving a richer, “wet-look” finish. Solvent-based sealers are generally more resistant to wear and tear, making them suitable for high-traffic areas. However, they have a stronger odour, require proper ventilation during application, and have a higher VOC content. Cleanup typically requires solvents like mineral spirits.
  
  

The choice between water-based and solvent-based sealers depends on your specific needs, such as desired appearance, environmental considerations, and the level of protection required for your pavers. It’s always a good idea to consult with a professional to choose the best sealer for your project.