How to Correctly Use SWAM Biocide Cleaner

SWAM Biocide Cleaner is a specialised spray-and-leave solution designed to target organic contamination on exterior surfaces.

Unlike traditional detergents or surfactants, SWAM uses a biocidal approach to break down mould, algae, moss and biofilms over time, making it an ideal product for sensitive or difficult-to-reach areas where high-pressure washing is unsuitable or undesirable.

1. What Is SWAM Biocide Cleaner?

SWAM is a spray-and-leave biocide-based cleaner that works over time to kill and break down organic matter. Once applied, it continues to remain active on surfaces and can be reactivated by rain, gradually degrading mould, moss, and algae without needing aggressive rinsing or scrubbing. This passive cleaning mechanism makes SWAM ideal for:

• Roof tiles
  

• Rendered walls
  

• Timber decking
  

• Stonework and pavers
  

• Shade sails and outdoor fabrics
  
  

SWAM is designed to prioritise surface safety, long-term cleanliness and minimal disruption to surrounding landscaping.

2. When to Use SWAM Instead of Detergent-Based Products

Choose SWAM when:

• You need long-term organic control on porous or delicate surfaces
  

• You want to avoid pressure washing or manual agitation
  

• Access is difficult (e.g. multi-storey walls or rooftops)
  

• You are targeting mould, algae, lichen, and moss
  

• The goal is disinfection and biological decay, not just visual cleaning
  

This differs from products like EBC, which act as degreasers and environmental detergents and are best used in conjunction with SH and surfactants in a softwash system.

3. How to Apply SWAM Biocide Cleaner

Preparation:

• Inspect the surface to identify organic contamination and porous areas
  

• Clear off loose debris such as leaves, soil or lichen clumps
  

• Protect delicate plants by pre-wetting or covering with tarpaulin
  

• Check weather forecast – ideally apply on a dry day with 24 hours rain-free window
  

Dilution:

• Follow the manufacturer’s recommendations
  

• For typical maintenance cleaning: dilute 1:5 with water
  

• For heavy infestations: use stronger concentration, 1:3 or even neat on very resistant growth
  

Application Process:

1. Apply using low-pressure spray equipment
   

2. Soak the surface thoroughly and ensure even coverage
   

3. Do not rinse
   

4. Allow to dry and activate over time
   

4. Spray and Leave: Why It Works

Unlike pressure washing, which often removes only surface-level growth, SWAM penetrates and chemically disrupts the biological structure of algae and mould. The product then stays active on the surface for days or weeks, depending on environmental conditions.

When rain falls, it reactivates the biocide to continue the breakdown process. Over time, this approach cleans, disinfects and prevents regrowth, especially in shaded or damp environments.

5. Use Cases and Surface Suitability

SWAM is safe for use on:

• Roofs (tiles, slate, Colorbond, terracotta)
  

• Render (including acrylic or lime-based renders)
  

• Timber cladding, fences, and decks
  

• Stone, brick, and concrete
  

• Awnings, sails, and outdoor umbrellas
  

For sensitive surfaces (such as painted finishes or soft timbers), always perform a spot test.

6. Maintenance Cleaning and Reapplication

• Reapply every 6 to 12 months depending on climate and exposure
  

• Perfect as part of an annual property care plan
  

• Minimal equipment needed – can be applied with a backpack sprayer or softwash pump system

7. Safety and Environmental Notes

• Use appropriate PPE (gloves, eyewear, long sleeves)
  

• Store in a cool place away from children and pets
  

• Avoid runoff into ponds or waterways
  

• Do not apply in strong wind or intense sun
  

SWAM Biocide Cleaner is a professional-grade spray-and-leave solution for long-term management of mould, moss and algae. With its passive cleaning action and ability to reactivate with rain, it offers a smart, low-labour alternative to pressure washing—perfect for sensitive surfaces and hard-to-reach areas.