---
product_id: 47881344
title: "16491 Concentrate: Ideal for Patios, Paths and Driveways (Kills Algae and Lichens), 2.5 Litres"
brand: "patio magic!"
price: "₨33897"
currency: LKR
in_stock: true
reviews_count: 8
category: "Patio Magic!"
url: https://www.desertcart.lk/products/47881344-16491-concentrate-ideal-for-patios-paths-and-driveways-kills-algae
store_origin: LK
region: Sri Lanka
---

# cleans in 2-4 days biodegradable & eco-conscious 2.5L concentrated power 16491 Concentrate: Ideal for Patios, Paths and Driveways (Kills Algae and Lichens), 2.5 Litres

**Brand:** patio magic!
**Price:** ₨33897
**Availability:** ✅ In Stock

## Summary

> ✨ Transform your outdoor space with zero hassle!

## Quick Answers

- **What is this?** 16491 Concentrate: Ideal for Patios, Paths and Driveways (Kills Algae and Lichens), 2.5 Litres by patio magic!
- **How much does it cost?** ₨33897 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/47881344-16491-concentrate-ideal-for-patios-paths-and-driveways-kills-algae)

## Best For

- patio magic! enthusiasts

## Why This Product

- Trusted patio magic! brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Proven Reliability:** Trusted by 13,000+ users with a 4.2-star rating since 2009
- • **Eco-Friendly Formula:** Biodegradable concentrate that respects your garden’s ecosystem
- • **Effortless Deep Clean:** Kills algae, moss & mould fast without scrubbing
- • **Versatile Surface Care:** Safe for patios, paths, driveways & fencing indoors/outdoors
- • **Long-Lasting Protection:** Keeps patios pristine for months after one application

## Overview

Patio Magic! 16491 is a 2.5-litre biodegradable liquid concentrate designed to eliminate green mould, algae, and moss from hard surfaces within 2-4 days. Easy to apply without scrubbing, it offers long-lasting protection for patios, paths, driveways, and fencing. Trusted by thousands since 2009, it combines powerful cleaning with eco-conscious ingredients for a safer, fresher outdoor environment.

## Description

Biodegradable liquid concentrate effectively removes green mould, algae and moss from hard surfaces in 2-4 days. Easy to apply, long-lasting protection without scrubbing.

Review: Fantastic product - Wish I'd taken before and after pictures! This did a great job. My patio area was really discoloured after the winter period with slippery green areas. Followed the instructions and poured this all over. I didn't use a hard bristle brush to work it in even though it says this is not nessasary. If it doesn't look like it's doing much after a day or so don't worry as it keeps working as the days go on. Our patio came up looking like new!
Review: This does work! - I have a 12 sq metre, Indian Sandstone patio and have used Patio Magic on it about ten times or so over the last 3 years. It has never failed to clear the algae, except once, when it rained unexpectedly a few hours after I had covered the patio. By using the recommended 1-4 concentration ratio, I get three watering cans out of one 2.5 litre container. I use these three watering cans as one application for my 12 sq metre patio, (so one 2.5 litre container does me for ONE generous covering). If it has not rained for two days before and it is not going to rain two days after you put the PM onto the patio, there is not a problem. You simply pour the solution onto the patio and that is it. It does work when wet but I have found that it does seem to work better when it is dry. It also shifts stains left by the removal of patio pots and on my red brickwork which has plants hanging over it. If Patio Magic has not cleared any algae you might have within two days, try again with a stronger concentration. Stained brickwork or moss will take a bit longer. By way of comparison, I have also used Jeyes Fluid which says it cleans patios. You use the same 1-4 concentration as Patio Magic. You have to rinse your patio, apply the solution, take a hard brush and go over it, wait for 10 minutes, then rinse the patio again. I did this 3 times using progressively stronger concentrations and putting more effort in with the hard brush. But it did not shift even the easiest algae stains which Patio Magic generally clears in a day or two. Two quick warnings. I used my watering can to apply PM onto the patio but forgot to wash it out. The next day, I used the same watering can to water the geraniums and I killed them all, so it is worth washing the watering can after each application. When you cover your patio with PM, please think of our gorgeous garden birds who will think the puddles are water. Birds drinking any patio cleaning solution will suffer a painful death, so please could I ask you to be careful on behalf of our bird population which suffers so much anyway. I cover my patio after the birds have gone to bed.

## Features

- Causes serious eye damage.
- Causes skin irritation.
- Toxic to aquatic life with long lasting effects.
- Use biocides safely. Always read the label and product information before use.
- Very toxic to aquatic life.
- Patio Magic! Liquid Concentrate Mould, Algae and Moss Killer can be used on hard surfaces indoor and outdoor, and can be used as a pre-paint fungicidal wash
- Patio Magic kills green mould in 2-4 days, and gently cleans the exposed surfaces in the weeks to come
- This biodegradable cleaner is suitable to treat your patios, fencing, driveways and all round hard surfaces
- Works in a few days, lasts months
- Size: 2.5 liters

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001VEJCLM |
| Capacity | 2.5 litres |
| Customer Reviews | 4.2 4.2 out of 5 stars (13,641) |
| Date First Available | 1 Mar. 2009 |
| Item display height | 20.7 centimetres |
| Item display length | 8.6 centimetres |
| Item display weight | 2.6 Kilograms |
| Item display width | 14 centimetres |
| Item model number | 16491 |
| Manufacturer | Patio-Magic |
| Part number | 16491 |
| Power source type | Air Powered |
| Product Dimensions | 8.6 x 14 x 20.7 cm; 2.6 kg |

## Product Details

- **Active ingredients:** Ferrous Sulphate
- **Brand:** Patio Magic!
- **Item form:** Liquid
- **Item weight:** 2.6 Kilograms
- **Liquid volume:** 2.5 Litres

## Images

![16491 Concentrate: Ideal for Patios, Paths and Driveways (Kills Algae and Lichens), 2.5 Litres - Image 1](https://m.media-amazon.com/images/I/81W+DwqXtHL.jpg)

## Questions & Answers

**Q: Where can I use Patio Magic! hard surface cleaner?**
A: Can be used on a wide range of outdoor surfaces such as patios, tarma/asphalt driveways, painted/glazed pots, garden ornaments, brickwork, masonry, York stone, concrete, greenhouses, conservatories, PVC, caravans and artificial play/sports surfaces.

**Q: Do I need to jet wash the surface before I apply Patio Magic!?**
A: No. Pressure-washing often roughens surfaces, thereby encouraging rapid algal re-growth. Patio Magic! is a dynamic algaecidal detergent which works without the need for manual scrubbing or pressure-washing - and it takes just minutes to apply.

**Q: When will I see results?**
A: The primary function of Patio Magic! products is to kill green mould and algae and lichens you will normally see the results of this within 2-4 days. Some lichens can be very hardy and results may take longer.

**Q: How long will Patio Magic! help prevent re-growth for?**
A: Protection can last for about 6-9 months after the first treatment, subsequent treatments can help extend the length of protection. Areas permanently in the shade, or prone to collecting water will have a reduced period of prevention.

**Q: When can children and pets return to treated areas?**
A: Children and pets can return to the treated areas once they have fully dried.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fantastic product
*by L***E on 24 November 2025*

Wish I'd taken before and after pictures! This did a great job. My patio area was really discoloured after the winter period with slippery green areas. Followed the instructions and poured this all over. I didn't use a hard bristle brush to work it in even though it says this is not nessasary. If it doesn't look like it's doing much after a day or so don't worry as it keeps working as the days go on. Our patio came up looking like new!

### ⭐⭐⭐⭐ This does work!
*by A***H on 21 January 2011*

I have a 12 sq metre, Indian Sandstone patio and have used Patio Magic on it about ten times or so over the last 3 years. It has never failed to clear the algae, except once, when it rained unexpectedly a few hours after I had covered the patio. By using the recommended 1-4 concentration ratio, I get three watering cans out of one 2.5 litre container. I use these three watering cans as one application for my 12 sq metre patio, (so one 2.5 litre container does me for ONE generous covering). If it has not rained for two days before and it is not going to rain two days after you put the PM onto the patio, there is not a problem. You simply pour the solution onto the patio and that is it. It does work when wet but I have found that it does seem to work better when it is dry. It also shifts stains left by the removal of patio pots and on my red brickwork which has plants hanging over it. If Patio Magic has not cleared any algae you might have within two days, try again with a stronger concentration. Stained brickwork or moss will take a bit longer. By way of comparison, I have also used Jeyes Fluid which says it cleans patios. You use the same 1-4 concentration as Patio Magic. You have to rinse your patio, apply the solution, take a hard brush and go over it, wait for 10 minutes, then rinse the patio again. I did this 3 times using progressively stronger concentrations and putting more effort in with the hard brush. But it did not shift even the easiest algae stains which Patio Magic generally clears in a day or two. Two quick warnings. I used my watering can to apply PM onto the patio but forgot to wash it out. The next day, I used the same watering can to water the geraniums and I killed them all, so it is worth washing the watering can after each application. When you cover your patio with PM, please think of our gorgeous garden birds who will think the puddles are water. Birds drinking any patio cleaning solution will suffer a painful death, so please could I ask you to be careful on behalf of our bird population which suffers so much anyway. I cover my patio after the birds have gone to bed.

### ⭐⭐⭐⭐⭐ Works like magic!
*by M***Y on 26 November 2025*

Patio Magic! 16491 Concentrate is fantastic for keeping patios, paths, and driveways clean. Very effective and easy to use, it made a noticeable difference in no time. I’m so happy with the results that I will definitely be buying again and would recommend it to anyone looking for a reliable outdoor cleaner!

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-10*