Natural Stone Cleaner for Driveways, Patios & Paths
High-Performance Cleaner for Natural Stone - For The Quick Removal Of Black Spot, Green Algae And General Surface Staining From All Types Of Natural Stone.
Smartseal Xtreme Natural Stone Cleaner is a professional grade cleaner specially formulated for the quick removal of black spot, mould, mildew, green algae and general surface staining from all types of natural stone.
Suitable for use on:
- Sandstone
- Black Limestone
- Granite
- Slate
- Marble
- Travertine
- Quartz
It is used widely by homeowners as well as professional cleaning companies to clean most types of natural stone without the need for intensive pressure cleaning. It's an easy to apply, fast-acting formulation, that leaves outstanding results and makes natural stone cleaning easier than ever before. Unlike acidic based cleaners, this powerful alkaline cleaner can be used on all types of natural stone without risk of damage to the surface.
In most cases, a dilution ratio of 1:1 is sufficient to get outstanding results but in cases of heavier surface contamination, the product can be applied neat and left for longer to dwell on the surface.
DIRECTIONS FOR USE:
1. To avoid damage to vegetation, saturate surrounding areas with water before and after applying product.
2. For best results DILUTE AT A RATIO OF 1:1 and apply by sprayer or watering can in temperatures above 5°C and to avoid fast evaporation, no higher than 22°C.
3. On heavily soiled areas or areas contaminated with black spot work in with hand brush or broom. Leave on the surface for 1-2 hours.
4. Rinse off with clean water or pressure washer, removing any residue of the cleaning solution.
5. In areas of very heavy soiling apply undiluted and if required re-apply, repeating process above leaving for a longer period (2-3hrs).
COVERAGE:
Up to 160m² per 20L container when diluted 1:1
***Once opened, product potency will start to reduce after 3 months***
IMPORTANT: CONTAINS CHLORINE AS AN ACTIVE INGREDIENT AND WILL STAIN FABRICS AND SENSITIVE MATERIALS. TAKE CARE TO AVOID CONTACT WITH FABRICS DURING APPLICATION. TOXIC TO AQUATIC LIFE. AVOID CONTACT WITH LAWNED AREAS. WEAR PROTECTIVE GLOVES AS WILL CAUSE SKIN BURNS. WEAR PROTECTIVE GOOGLES TO AVOID CONTACT WITH EYES.
See SDS for full health and safety information.
Q: How do I clean the brush I'm using after I have finished?
A: Just rinse the brush thoroughly with water.
Q: I have a slate patio to clean would this be safe to use and how should it be applied for best results
A: The Xtreme Natural Stone Cleaner is usually applied by watering can. Once it is wet and dwelling on the surface, it is best to use a stiff broom or brush to agitate the surface. This should get the best cleaning results.
Q: I want to use this on a natural stone wall however it has porcelain patio tiles next to it will this product damage the porcelain tiles if any oversprays ?
A: The Xtreme Natural Stone Cleaner will not damage the porcelain tiles if it oversprays.
We provide a national delivery service for our block paving sealer, pattern imprinted concrete sealer, roof coatings and tarmac restorer on a standard 2 - 4 working day basis. Dependent on weight, this is normally done by pallet or parcel carrier.
If you need products delivered quicker, for a small additional charge, orders placed before 1.30pm can be delivered within 1 - 2 working days to most parts of the UK, although this is dependent on the courier service in your area and the product/s ordered. If you require this service, please check on area availability by calling 01268 722500.
Our commitment is to supply all orders as placed and we offer a comprehensive guarantee of quality. Providing a reliable delivery service to all our customers is most important to us and this is backed up by the many satisfied customer testimonials we have received over the years.
If you need an order delivered to a different address, left somewhere at your property without a signature or left with a neighbour, just let us know.
We also try to maintain 100% stocking levels of our products at all times, so an immediate despatch is virtually guaranteed.
Our product returns policy can be viewed by visiting our Terms and Conditions section.
*Free delivery on orders over £75 are subject to the delivery address location.



Decent cleaner, good coverage, gets natural stone clean. I used to use a brand called go protect but can't find them anymore, this product seems similar just make sure you don't let dogs on it till you seal it. I will have to re do a few areas as dogs were let onto it before I could get the sealer down.
Ordering directly from SmartSeal was a breeze. The website didnt give me any grief, and they kept me posted with regular updates until the bottle of natural stone cleaner landed on my doorstep just two days later. The instructions were actually written for humans, toosimple to follow and didnt require a PhD in chemistry to understand the safety bits. ?Ive been nursing nine years of grime and algae on my Indian stone flags, and lets just say it wasn't a great look. Ive spent more hours than Id like to admit behind a pressure washer, but it always felt like I was just moving the dirt around rather than actually getting back to the "glory days" of the original stone. It turns out, water and enthusiasm weren't enough to beat a decade of buildup. ?I started with a 1:1 ratio, and within two hours, most of the flags were looking fresh again. For the stubborn lichenthose annoying little spots that usually refuse to budgeI applied the stuff neat, and they vanished in minutes. Its rare to find a product that actually does the heavy lifting for you, but this stuff made short work of the mess. ?The transformation is honestly impressive; all the original colors are back, and the patio finally looks like a feature again rather than a swamp. If youve been wasting your weekends wrestling with a power hose like I was, do yourself a favor and get this instead. Its highly effective and saved me from another summer of vibrating hands and soggy boots.
Ordering was simple, delivery was exceptional as it was delivered within 24 hours. The video demonstration on how to use the natural stone cleaner was very informative and covered all aspects of the process. Application was easy and the product greatly reduced the amount of labour required to clean the stone. This product has transformed our patio areas, we still have black spots but that is due to the length of time since the last clean. We are sure more regular cleaning with this stone cleaner will get our patios back to their original glory.