BAC 50 – Benzalkonium Chloride 50% Professional Biocide
BAC 50 – Benzalkonium Chloride 50% Professional Biocide
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Control biological growth and sanitize outdoor surfaces with BAC 50 (Benzalkonium Chloride 50%), supplied in concentrated 5L containers, multi-packs, and bulk 25L trade drums. Formulated as an industrial-grade, 50% active cationic quaternary ammonium biocide, this chemical concentrate eliminates green mould, algae, moss, lichen, and fungal spores from exterior hard surfaces while leaving an invisible residual barrier that deters regrowth.
Engineered specifically for exterior cleaning contractors, grounds maintenance teams, roof restoration specialists, and industrial facilities, this professional-strength biocide cleans without abrasive pressure washing or harsh sodium hypochlorite fumes. Available across multiple volume variants, it delivers long-lasting protection across block paving, tarmac, render, timber decking, concrete, masonry, and roof tiles.
Key Features:
· 🛡️ 50% High-Concentration Active Formula – Delivers high coverage when diluted up to 1:20 or 1:40 for professional exterior surface washing.
· 🌿 Residual Growth Prevention – Penetrates porous surfaces to destroy root spores and prevent mould, lichen, and algae regrowth for months.
· 🏡 Multi-Surface Exterior Versatility – Safe for block paving, natural stone, render (K-Rend), roof tiles, tarmac, artificial grass, and timber decking.
· 📦 High-Economy Trade Sizing – Supplied in heavy-duty 5L containers and 25L bulk drums with tiered trade quantity savings.
· 🚰 Controlled Dosing Option – A 30ml precision dosing pump can be purchased and used with all 5L and 25L containers for clean, controlled, mess-free measuring.
Trade & Facility Applications:
· Exterior Cleaning Contractors: Professional softwashing of K-Rend wall render, cladding, and architectural facades.
· Roof Cleaning & Restoration: Deep biocide treatments to eradicate moss, liverworts, and lichen without damaging delicate roof tiles.
· Grounds & Facilities Maintenance: Clears slippery green algae and bio-film from walkways, car parks, block paving, and sports courts.
· Timber & Decking Care: Deep cleans outdoor wooden structures, composite fencing, and timber boardwalks without bleaching fibers.
Product features
Product features
- 🧪 50% Active Cationic Biocide – Industrial-grade Benzalkonium Chloride formulated for high-dilution outdoor chemical applications.
- 🚫 Prevents Biological Regrowth – Leaves a protective residual barrier in porous substrates that keeps surfaces clean for up to 12 months.
- 🧱 Non-Corrosive to Stone & Render – Bleach-free formula will not degrade modern through-colored renders (K-Rend) or etch natural stone.
- 💧 Economical Softwash Concentrate – Dilutes up to 1:40 with water, providing high square-metre coverage per 5L container.
- 📦 Bulk Trade Sizing – Available in single 5L containers, value multi-packs, and 25L drums tailored for exterior softwash specialists.
Direction to use
Direction to use
📋 Commercial Application & Dilution Guide:
Dilution Ratios:
- Severe Infestation / Lichen & Thick Moss: Dilute 1 part BAC 50 with 9 to 19 parts clean water (1:10 to 1:20).
- Standard Algae, Bio-Film & Routine Maintenance: Dilute 1 part BAC 50 with 29 to 39 parts clean water (1:30 to 1:40).
Application Technique:
- Ensure surface is completely dry before application.
- Apply evenly using a chemical-resistant low-pressure garden/backpack sprayer or watering can fitted with a fine rose.
- Thoroughly wet the target area; do not rinse off immediately.
- Allow natural weathering (rain and wind) to wash away dead bio-growth over the following 3–7 days.
Weather Conditions:
Apply during dry weather when no rain is forecast for at least 8 to 12 hours.
💧 Precision Dosing Pump Guide (5L & 25L Drums):
For exact measuring: Depress your matching 30ml precision dosing pump directly into your backpack sprayer or mixing bucket. Using a pump prevents splashing, stops chemical waste, and keeps your chemical storage area clean.
Sizing and Availability
Sizing and Availability
Standard Packaging: Supplied in heavy-duty 5L containers for standard commercial use.
Precision Dosing Pump: We highly recommend selecting our matching 30ml precision dosing pump variant at checkout. This ensures perfect dilution accuracy, completely eliminates hazardous splashing, and maximizes your product's lifespan by preventing chemical waste.
Bulk Trade Capacity: This product is fully stocked in 25L trade containers (available with or without an integrated heavy-duty dosing pump) engineered for large-scale contract cleaning.
Custom Variants: In line with our standard inventory, this product is available in up to 10 tailored configurations to perfectly match your exact commercial or residential application requirements.
Safety Information
Safety Information
🚨 Professional Industrial Biocide – Read full safety directions and Safety Data Sheet (SDS) before trade application. Contains concentrated Quaternary Ammonium Compounds (Benzalkonium Chloride 50%).
- Hazard Classification: DANGER! Class 8 Corrosive & Class 9 Aquatic Hazard.H314: Causes severe skin burns and eye damage.H302: Harmful if swallowed.H410: Very toxic to aquatic life with long-lasting effects.
- ⚠️ Chemical Caution: KEEP PETS AND ANIMALS OFF TREATED AREAS UNTIL COMPLETELY DRY. Toxic to cats, dogs, and aquatic life in wet concentration. Do not allow run-off to enter fish ponds or natural waterways.
- Mandatory PPE Required: Always wear chemical-resistant gloves (PVC/nitrile long-cuff), safety splash goggles or full face shield, protective boots, and a waterproof suit/apron. Ensure adequate ventilation during application.
- First Aid Response:IF IN EYES: Rinse cautiously with fresh cold water for at least 15 minutes, holding eyelids open. Remove contact lenses if present and easy to do—continue rinsing. Seek urgent immediate emergency medical attention.IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin thoroughly with running water for at least 15 minutes. Seek immediate medical attention.IF INHALED: Move person to fresh air and keep comfortable for breathing. Seek medical advice.IF SWALLOWED: Rinse mouth thoroughly. DO NOT induce vomiting. Seek urgent immediate emergency medical attention.
- 📦 STORAGE INSTRUCTIONS: Store upright in original UN-approved sealed containers inside a secure, well-ventilated chemical store away from direct sunlight, food, and frost. Keep out of reach of children.
Shipping & Returns Compliance
Shipping & Returns Compliance
📦 Trade Shipping & Safety Notice: Due to strict UK transport regulations, chemical safety handling protocols, and COSHH compliance, this product is classified as a hazardous/restricted liquid. Once delivered, this item is non-returnable if the factory safety seal, cap, or foil barrier has been broken or unsealed.
If your order arrives damaged, leaking, or compromised, please capture photographic proof immediately and contact our trade support desk within 48 hours. For our full structural breakdown, view our official Returns & Refunds Policy.
Technical Specifications & EN Standards
Technical Specifications & EN Standards
Active Substance: Benzalkonium Chloride (Alkyldimethylbenzylammonium chloride) 50% w/w (500g/L)
Form / Appearance: Clear Pale Liquid
Scent: Mild Characteristic Odour
pH Level: 6.5 – 8.0 (Neutral)
Specific Gravity: ~0.98 – 1.00 g/cm³ at 20°C
Biocidal Regulation: GB BPR Compliant Active Substance
Shelf Life: 24 Months (When stored in unopened original container in cool, frost-free conditions)
COSHH Documentation: Direct SDS PDF download link provided.
📖 Official Dilution Ratios & Safety Application Guide →
Read our official Product Usage, Dilution & Safety Guide →
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