How to Choose the Best Concrete Cleaner for Your Outdoor Surfaces

The Secret to Algae-Free, Beautiful Outdoor Spaces

Concrete surfaces, whether patios, driveways, or paths, are susceptible to wear and tear, stains and algae growth. Traditional cleaning methods like power washing and scrubbing can cause damage and are often unnecessary when using the right products. This guide will help you understand the best approaches to cleaning and protecting your concrete surfaces using two of our standout products: MAK Algae Remover and Chlor-Kleen Extra.

Understanding the Cleaning Needs of Your Outdoor Surfaces

Outdoor surfaces like concrete, tarmac, decking, and roof tiles endure constant exposure to changing weather, moisture, and heavy use. While these materials are designed to be durable, they are also porous and can accumulate mould, algae, and stubborn stains over time. Tarmac can become slick and discoloured with algae buildup, decking can develop algae and mould that makes it slippery, and roof tiles can harbour algae that damage their integrity.

Each type of surface has unique cleaning needs. Concrete requires a cleaner that penetrates deeply to remove embedded stains, tarmac benefits from solutions that target algae and lichens without eroding the surface and decking needs a gentle but effective cleaner that won’t damage wood fibres.

Remember that moss and algae absorb moisture like sponges. If your roof is covered, this means it is constantly damp. If this moisture seeps beneath the tiles, it can cause the wood underneath to rot, compromising the roof’s structure and potentially leading to costly repairs. By choosing the right products tailored to treat each surface safely, you’ll not only achieve a thorough clean but also extend the lifespan of each surface.

With the proper solution, you can avoid high-pressure washing or abrasive scrubbing, which may cause erosion, cracking, or surface degradation. A targeted cleaner will work deep within the material to remove contaminants while protecting its natural finish, helping to keep outdoor areas looking fresh and safe for years to come

The Problem with Power Washing and Scrubbing

While power washing and heavy scrubbing can be effective at removing heavy surface dirt, they do pose risks:

• Erosion and Surface Damage: Power washing at high pressure can erode the top layer of concrete, leading to a rough and uneven texture.
• Time-Consuming and Labor-Intensive: Scrubbing is labour-intensive and may still fail to reach deeply embedded stains or moss.
• Environmental Impact: Excess water and energy are often used with these methods, which can be unsustainable in the long run.

Fortunately, products like MAK and Chlor-Kleen Extra offer solutions that are easier to apply, highly effective, and safe for outdoor surfaces without requiring scrubbing or high-pressure washing.

Green Algae Remover & Concrete Cleaning Products Overview

MAK (Green Algae Remover)

When to Use MAK (Green Algae Remover)

1. For Surfaces with Heavy Algae Growth

MAK is ideal if your outdoor surfaces are prone to frequent green and red algae growth, such as shaded patios, driveways under trees, or damp paths. Its targeted formula removes algae at the roots and prevents regrowth, which is essential for longer-lasting results.

Shaded Patios: Patios in shady areas often develop slippery algae, especially after rain. MAK effectively eliminates these hazards, making the patio safer and more visually appealing.

Driveways Under Trees: Overhanging branches create damp, algae-prone conditions. Using MAK prevents moss and algae buildup, ensuring a clean and slip-resistant driveway.

Garden Paths: Paths that receive little sunlight can become treacherous due to algae growth. MAK tackles these problem areas, keeping them clear and safe for regular use.

Wooden Decking: With Ireland’s frequent rain and damp climate, wooden decking is especially prone to algae buildup, making it slippery and unsafe. MAK is the ideal solution for tackling these conditions, effectively cleaning and protecting the decking. Its targeted formula removes algae without damaging the wood, ensuring your deck stays safe, attractive, and ready to enjoy year-round, even in Ireland’s wettest seasons.

Roof Tiles: Algae and lichens on roofs not only look unsightly but can also damage tiles over time. MAK’s formula eliminates algae at the roots, preventing regrowth and protecting the roof’s structural integrity.

Tennis Courts or Sports Areas: Outdoor courts exposed to our damp weather benefit from MAK’s premium properties, maintaining a safe and playable surface.

Outdoor Steps: Steps can become hazardous when algae and lichens accumulate. Regular use of MAK ensures they remain clean and secure.

2. For Areas You Want to Protect Without Frequent Cleaning

Since MAK works well on tarmac, decking, and roofs, it’s an excellent choice for surfaces where you want to avoid frequent cleaning cycles. It’s designed to maintain cleanliness over time, reducing the need for repeated applications.

Chlor-Kleen Extra

When to Use Chlor-Kleen Extra (Concrete Cleaner)

1. For Concrete Surfaces with Stubborn Stains and Grime

Chlor-Kleen Extra is formulated to tackle tough stains and accumulated grime on concrete and stone. Its chlorine-based solution penetrates the concrete surface, effectively dissolving dirt and restoring the surface to a like-new appearance.

Concrete Driveways and Paths: Restores heavily soiled areas by removing embedded dirt and organic growth.

Patios and Paving Stones: Cleans thoroughly without the need for heavy scrubbing or pressure washing, preserving the integrity of the surface.

Brickwork and Walls: Targets organic stains that cling to rough textures, ensuring an even, clean finish.

Outdoor Stone Features: Maintains the natural appearance of decorative stonework by removing discolouration and organic buildup.

2. For a Quick Surface Renewal

If you need a fast-acting cleaner, Chlor-Kleen Extra can deliver dramatic results. It’s particularly useful for surfaces that have become heavily soiled over time. Ideal for seasonal deep cleaning or preparing surfaces for sealants or coatings, it’s a versatile choice for maintaining your outdoor spaces.

MAK vs. Chlor-Kleen Extra: Key Differences

To help you make an informed choice, here’s a comparison of the two products based on their specific applications, best usage scenarios, and protective qualities.

Feature	MAK	Chlor-Kleen Extra
Primary Function	Targets organic growth, lichens, mould and algae specifically	Cleans and restores concrete and stone surfaces
Suitable Surfaces	Tarmac, decking, patios, driveways, roofs	Concrete, paths, patios, driveways, stone. (recommended for short-term contact only on tarmac surfaces)
Application Method	Spray on, no need for scrubbing or power washing.	Spray or brush on, no need for scrubbing or power washing
Effectiveness	Restores heavily soiled surfaces to a like-new state. Fast-acting & effective at half the dilution rate of standard Sodium Hypochlorite	Restores heavily soiled surfaces to a like-new state. Fast acting & effective at half the dilution rate of standard Sodium Hypochlorite
Environmental Impact	Chlorine-free, targeted lichen/algae/mould treatment	Chlorine-based solution, delivering powerful results with reduced product usage compared to competitors

Quick Application Guide: How to Achieve the Best Results for Your Outdoor Spaces

Both MAK and Chlor-Kleen Extra offer unique benefits, depending on the specific needs of your outdoor surfaces. If green algae and mould are recurring issues, MAK will prevent growth and keep surfaces cleaner for longer. However, for heavily soiled concrete or stone needing deep restoration, Chlor-Kleen Extra is a powerful choice that restores surfaces quickly.

*Due to the broad variation of patio slabs and other paving materials, a small area should be tested first for suitability as colour variations may result.

Application Step	Instructions
Step 1: Choose the Right Day	Apply either product on a dry, overcast day to prevent rapid evaporation and allow the formula to penetrate the surface.
Step 2: Clean Up Loose Debris	Remove leaves, dirt, and any loose debris from the surface before applying the product for optimal effectiveness.
Step 3: Spray Evenly Across the Surface	For MAK: Dilute MAK with clean, good-quality water using the required usage rate. Spray an even coat over the algae or mould-prone areas and allow it to dry completely. For Chlor-Kleen Extra: Apply a 20/1 dilution rate, let sit for 15 to 30 minutes, and rinse.
Step 4: Rinse (for Chlor-Kleen Extra Only)	Chlor-Kleen Extra needs a thorough rinse with water after setting to remove any residue including loosened grime, leaving a clean surface.
Step 5: Maintenance and Repeat Applications	MAK: Reapply every few months to prevent mould and algae regrowth, especially in shady areas. Chlor-Kleen Extra: Use seasonally for deep cleaning.

Maintenance Tips to Prolong your Clean outdoor Surfaces

1. Reapply as Needed: Follow up with a reapplication of MAK every few months to maintain algae-free surfaces in shaded or damp areas.
2. Regular Inspections: Check concrete and stone areas periodically for early signs of moss or staining. Addressing these sooner can reduce the need for intense cleaning.
3. Avoid Harsh Treatments: Biocel’s key products make scrubbing and power washing unnecessary, preserving the integrity of your surfaces.

Use Biocides Safely. Always read the label & production information before use.
Contact Biocel for a safety DataSheet

By understanding your outdoor surfaces and choosing the right product, you’ll enjoy clean, well-maintained paths, patios, and driveways without the need for labour-intensive methods.