Best Slate Patio Sealers of 2025

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.

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.

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.

Pro-Kleen PatioSeal is an effective patio sealant designed for Indian sandstone, concrete, and brick surfaces. It provides a clear matt finish that enhances your outdoor areas, making them look pristine. This product is especially useful for preventing stains from oil, fat, and grease, keeping your barbecue areas tidy. With a waterproof seal, it protects your flooring from weathering and staining, ensuring long-lasting durability. You can cover up to 50m² with just one 5-litre bottle, making it a cost-effective choice for your hard floors.

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.

The Smartseal Stone Sealer is designed to enhance and protect your natural stone surfaces. Its professional-grade formula provides a colour-enhancing finish, allowing your stone to shine with a richer, deeper look. You will enjoy superior protection against algae, lichen, and stains, thanks to its advanced acrylic coating that forms a durable barrier. With just one coat needed for optimal results, this sealer ensures quick application and long-lasting protection, making your outdoor spaces look pristine with minimal maintenance.

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.

StoneCare4u Slate Sealer is a high-performance product designed primarily for natural sandstone surfaces, but it also works well on various porous materials. Its satin finish enhances the natural colours of your stone, providing an attractive appearance. You can choose to apply additional coats for a glossier look. Furthermore, this sealer protects against stains from green growth, lichen, and oil spills, making it an excellent choice for outdoor surfaces. Enjoy the durable, quick-drying formula that keeps your surfaces looking pristine.

The SmartSeal Stone Sealer offers exceptional invisible protection for your natural stone surfaces. This professional-grade product guards against water damage and stains, preserving the beauty of your stone driveway or patio. Its advanced formulation ensures extended protection against moss, lichen, and algae, keeping your surfaces looking pristine. Additionally, the quick-drying feature allows you to apply the sealer easily with common tools, making your project progress swiftly while providing water-resistant properties within just 30 hours.