Patio Cleaning & Sealing Products for Long-Lasting Protection

Browse premium patio cleaners and sealants to remove dirt, black spots and algae, then protect your patio with long-lasting weatherproof sealers.

Patio Sealants & Cleaners – Long-Lasting Protection for Outdoor Surfaces

At Pro Sealants, we offer a comprehensive range of patio sealants and cleaners to protect and enhance your outdoor spaces. Our products are formulated to shield patios from the UK's variable weather, preventing damage from moisture, UV rays, and everyday wear. Whether you're dealing with natural stone, concrete, or porcelain, our solutions help maintain the beauty and integrity of your patio surfaces.

Restore Patios with Powerful, Safe Cleaning Products

Cleaning your patio properly is the first step to making it look like new. Our specialist cleaners are designed to tackle:

  • Black spot and lichen removal
  • Algae, moss, and green growth
  • Stubborn dirt and weather staining
  • Rust and efflorescence on paving

We stock leading cleaning products that are tough on grime but safe for stone and paving. Whether you’ve got a discoloured Indian sandstone patio or a slippery block-paved path, we have a cleaner that works.


Patio Cleaning FAQs

Do I Need to Clean Before Sealing?

Yes — cleaning is a critical step before applying a patio sealant. If you seal over dirt or moss, it can:

  • Trap moisture and cause discolouration
  • Prevent proper bonding of the sealant
  • Leave visible stains or patches under the surface

A properly cleaned patio ensures the sealant works effectively and looks professional.

What’s the best way to clean a patio before sealing?

For best results, use a quality patio cleaner followed by a pressure washer to lift dirt, algae, and black spot effectively. Brands like Azpects recommend pressure washing over scrubbing with a stiff brush, as it delivers a deeper, more thorough clean — essential for proper sealant adhesion. Be sure to let the patio dry fully before applying any sealant.

Can I use bleach to clean my patio?

Many professional patio cleaners, including ProClean, are made with a specially formulated sodium hypochlorite solution — commonly known as ‘hypo’ or outdoor-grade bleach. It’s far stronger than household bleach and highly effective for removing algae, black spot and stubborn organic growth from most patio surfaces. That said, hypo isn’t always necessary — if there’s no heavy algae or black spot present, a gentler clean using our Snow Foam Pre-Wash or Deep Clean from Azpects may be more suitable. Always carry out a small test patch first to ensure compatibility with your surface.

How long after cleaning can I apply a patio sealant?

Wait until the patio is completely dry, which usually means at least 24–72 hours depending on weather. Damp patios can cause sealants to go cloudy or peel.

What causes black spots on patios?

Black spots are typically caused by lichen — a tough, embedded growth that forms on porous paving. The most effective treatments are a dedicated black spot remover or a sodium hypochlorite-based cleaner (like ProClean). Always test the product on an inconspicuous area first to ensure it's safe for your surface type.

How often should I clean my patio?

Once or twice a year is usually enough. Spring is a great time to clean and seal ready for summer use.