Best Slate Patio Sealers of 2026

The Stonecare4u Slate Sealer is a top-quality product designed for external and natural limestone surfaces. It enhances the colours of your stone, giving it a vibrant and lively appearance while providing excellent water repellence. After application, it helps prevent unsightly growth such as algae and moss, keeping your surfaces looking clean and fresh. Additionally, it is eco-friendly, making it safe for both pets and children once dry, giving you peace of mind while using it around your home.

SmartSeal Wet Look Sealer is the perfect choice for protecting and enhancing your outdoor stone surfaces, including limestone, sandstone, and granite. Its premium formula provides a stunning silk/satin or ‘wet-look’ finish, making your stone radiate with beauty. This sealer is versatile for both interior and exterior use, covering up to 15m² per litre depending on porosity. Additionally, it enhances the natural colours of your stone, bringing vibrancy and elegance to your surroundings.

The Smartseal Limestone Sealer provides long-lasting protection for your black limestone and slate surfaces. It creates a robust barrier against stains, moisture, and damage, ensuring your outdoor areas remain pristine. Additionally, it revives faded patios, restoring their original jet black appearance and revitalising your stone surfaces. The application process is straightforward, requiring just a clean and dry surface before applying two coats with a roller, making it easy for you to maintain a beautiful look with minimal effort.

The GLEAN Slate Sealer is a premium water-based impregnating sealer suitable for both interior and exterior use. Its low odour makes it convenient for indoor applications, while its versatility allows for use on various hard, porous surfaces like sandstone and limestone. With a natural finish, this product creates an invisible barrier that effectively protects your slate surfaces from water, oil, dirt, limescale, and grease. Additionally, its breathable protection prevents moisture buildup, ensuring your surfaces remain in good condition.

EASYSeal Sandstone Sealer is a water-based, professional-grade sealer designed specifically for sandstone and other natural stones. It enhances the natural colour of your paving without adding a shiny finish, making your outdoor spaces look vibrant. The sealer effectively resists algae and fungal growth, ensuring your surfaces remain clean and safe. With easy application and a generous coverage of up to 25m2, it simplifies the sealing process so you can enjoy your patio without hassle.

Lithofin MN Slate Seal is a ready-to-use product designed specifically for indoor applications. This means you can easily protect your slate surfaces without any complicated preparations. However, it is important to note that it is not suitable for worktops or bathrooms/wetrooms, ensuring the best performance in appropriate settings. The product contains solvents, which help in effectively sealing the slate, enhancing its durability. Additionally, you can apply it in several coats for added protection and a more polished finish.

EASYSeal Slate Sealer is an advanced, water-based product designed to protect and enhance your slate and limestone surfaces. With good coverage of up to 25m², it effectively repels dirt and stains while preventing the growth of moss and algae. Its easy application process allows you to quickly seal your surfaces, ensuring they remain looking great. Additionally, it forms a long-lasting barrier against oil, stains, and rain, making it an ideal choice for maintaining your patio and garden.

The FILA STONEPLUS Sealer is a high-quality colour enhancer that penetrates natural stone surfaces, providing effective protection against water and stains. This means you can enjoy your outdoor spaces without worrying about oil stains or moisture damage. It is suitable for various natural stones, including granite and slate, making it a versatile choice for your home. With a matte finish, it enhances the natural beauty of your surfaces while also being easy to apply, requiring only a shake before use and allowing for foot traffic after just eight hours.