How to Use BAC 50 Biocide Safely

What Is BAC 50?

BAC 50 stands for Benzalkonium Chloride 50%. It is a highly concentrated, professional-grade chemical liquid designed to kill organic growths, bacteria, algae, and mold. Because it is a 50% active concentrate, it is incredibly strong and long-lasting. To use it safely and effectively without wasting product, it must always be mixed with clean water before application.

 

🌿 How BAC 50 Works

Think of BAC 50 as an invisible shield that destroys organic growth. The moment the mixed liquid touches a surface, it pierces the outer walls of bacteria, green moss, slimy biofilm, and algae. It stops them from growing immediately. Within 24 to 48 hours, the green slime or dirt will die, turn brown, and wash away with the rain, leaving the surface clean and sanitised for months.

 

🏢 Common Applications (Where to Use It)

You can use BAC 50 across many different areas. Here are the most common places it is used:

• Outdoor Patios, Roofs & Driveways: Destroys green moss, slippery algae, black lichens, and liverwort on stone, brick, tarmac, and concrete surfaces.
• Hard Surface Disinfection: Perfect for deep-cleaning floors, walls, and tabletops in commercial kitchens, food processing factories, and animal housing.
• Water System Care: Cleans out green slime and bio-sludge inside commercial cooling towers, green house irrigation pipes, and ornamental ponds.
• Agriculture & Farming: Sanitises transport vehicles, tractor wheels, animal crates, and feeding equipment to keep livestock safe from diseases.

 

🧪 Dilution Ratios & Mixing Matrix

Because BAC 50 is a raw, high-strength concentrate, you must never pour it directly onto a surface without mixing it with water first. Using it raw will waste your product and could mark your surfaces.

Here are the exact recipes for all 9 essential applications, showing exactly how many parts water to use, along with the precise number of presses needed if you use our Precision 30ml Dosing Pump:

Cleaning Application	Dilution Ratio	Pumps Needed per 1L Water	Pumps Needed per 5L Water
1. Heavy Outdoor Moss & Patio Cleaning	1:20	1.6 Pumps (50ml)	8.3 Pumps (250ml)
2. Medium Algae & Lichen Maintenance	1:40	0.8 Pumps (25ml)	4.2 Pumps (125ml)
3. Light Preventative Surface Wash	1:100	0.3 Pumps (10ml)	1.7 Pumps (50ml)
4. General Commercial Surface Disinfection	1:200	0.1 Pumps (5ml)	0.8 Pumps (25ml)
5. High-Traffic Touchpoint Sanitising	1:300	0.1 Pumps (3.3ml)	0.6 Pumps (16.6ml)
6. Agricultural Equipment Wash down	1:400	A few drops (2.5ml)	0.4 Pumps (12.5ml)
7. Food-Safe Countertop Cleaning	1:500	A few drops (2ml)	0.3 Pumps (10ml)
8. Deep Food-Plant Sanitisation (Rinse Required)	1:1000	A few drops (1ml)	0.2 Pumps (5ml)
9. Water System & Biofilm Control	1:2000	A few drops (0.5ml)	0.1 Pumps (2.5ml)

Practical tip: For ratios tighter than 1:200, a single pump will overshoot — use the pump to get close, then top up precisely with a small measuring syringe. For outdoor moss treatment at 1:20 to 1:40, the pump makes filling a garden sprayer tank quick and mess-free.

💡 Tip for accurate mixing: Use a 30ml dosing pump on your 5L container to ensure exact chemical control without spills or waste — ideal when working with precise ratios like 1:200 or 1:500.

⚠️ The Golden Mixing Rule

When preparing your mixture, always fill your bucket or sprayer with water first, then add the BAC 50 concentrate into the water. Never pour water directly into a bucket of raw concentrate. Doing this prevents the chemical from foaming up uncontrollably and stops raw chemical liquid from splashing.

🛠️ Best Application Practices for Better Results

Follow these steps to ensure the job gets done right the first time:

• Check the Weather: If you are spraying outdoor patios or roofs, pick a dry, clear day. Do not spray if rain is coming within 6 hours. If it rains too soon, the water will simply wash the chemical away before it has a chance to kill the moss.
• Apply Uniformly: Use a standard garden pump sprayer or a backpack sprayer. Spray the liquid evenly until the leaves or stones look fully wet. If you miss a spot, the moss in that corner won't die!
• Use the Right Accessory: Tipping a heavy 5L or 25L bottle to measure out tiny milliliters can cause messy spills. Screw a dedicated 30ml Dosing Pump directly onto the bottle to pump out exactly what you need with zero mess.

 

📋 Safety Rules & Required PPE (Staying Safe)

Raw BAC 50 is classified as a Corrosive liquid. It is completely safe once mixed into water, but while it is still in the bottle as a raw concentrate, you must protect yourself:

• Protect Your Eyes: Always wear safety goggles or a clear plastic face shield. If raw concentrate splashes into your eyes, it can cause severe, permanent damage.
• Protect Your Skin: Always wear thick Nitrile or Neoprene gloves and long-sleeved clothes. If you get it on your skin, wash it off with soap and water immediately.
• Do Not Breathe It In: Mix your chemical outside or in a room with wide-open windows so you don't breathe in the strong fumes.
• First Aid: If the concentrate gets into your eyes, keep them open and rinse them continuously with running tap water for 15 minutes, then call a doctor immediately.

 

🚑 First Aid Measures

• Skin Contact: Immediately take off any contaminated clothing. Rinse the skin thoroughly with plenty of clean running water for at least 15 minutes. Seek medical advice if irritation continues.
• Eye Contact: Immediately flush the open eye with clean running water for at least 15 minutes. Remove contact lenses if present. Seek immediate medical attention.
• Ingestion: Do not induce vomiting. Rinse the mouth out thoroughly with water and drink plenty of water or milk. Seek immediate medical attention.
• Inhalation: Move the person into fresh air immediately. If breathing becomes difficult, seek medical advice right away.

📦 Storage & Disposal

• Storage Environment: Store only in the original, tightly sealed plastic container. Keep it in a cool, dry, locked location out of direct sunlight and completely out of reach of children and animals.
• Chemical Compatibility: Do not mix BAC 50 with standard household soaps or anionic detergents. Mixing them together completely neutralises the active biocide ingredients, making the product useless.
• Safe Disposal: Small amounts of diluted, used product can be washed away normally. Do not pour large amounts of raw chemical concentrate down domestic drains or into natural waterways. Dispose of surplus containers in accordance with local environmental regulations.

🛒 Order Your Professional Supplies Directly

We stock industrial-strength biocide products in large trade volumes for businesses, farms, and domestic home use.

👉 View and Order BAC 50 – Benzalkonium Chloride 50% Professional Biocide

👉 Grab Your Acid-Resistant Sprayers & Professional Dosing Pumps Here

Disclaimer: This guide is for informational purposes only. Always read the safety label on the back of the bottle and comply with standard UK COSHH regulations before starting.