Pressure washing is an effective way to clean surfaces like driveways, sidewalks, and siding. One of the most powerful cleaning agents used in pressure washing is sodium hypochlorite (SH), commonly known as bleach. If you’re wondering where to buy SH for pressure washing, this guide will help you find the right product while providing essential safety and usage tips.
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What Is SH (Sodium Hypochlorite) for Pressure Washing?
Sodium hypochlorite (SH) is a chemical compound widely used as a disinfectant and cleaning agent. In pressure washing, it helps remove mold, mildew, algae, and stains from various surfaces. It is often diluted with water to create an effective cleaning solution.
Common Uses of SH in Pressure Washing
- House Washing – Removes mold, mildew, and dirt from siding.
- Roof Cleaning – Helps eliminate black streaks caused by algae.
- Concrete Cleaning – Brightens driveways, sidewalks, and patios.
- Deck & Fence Restoration – Cleans and disinfects wooden surfaces.
Where to Buy SH for Pressure Washing
Finding the right SH solution for pressure washing depends on your needs and location. Below are the most common places to purchase it.
1. Local Hardware Stores
Many hardware stores carry sodium hypochlorite in different concentrations. Look for:
- Home Depot
- Lowe’s
- Ace Hardware
- Local pressure washing supply stores
2. Pool Supply Stores
Since SH is also used as pool chlorine, pool supply stores often sell it in liquid or granular form.
3. Online Retailers
If local options are limited, you can buy SH online from:
- Amazon
- Walmart
- Pressure washing specialty websites
4. Chemical Supply Companies
For bulk purchases, industrial chemical suppliers offer high-concentration SH (usually 10-12.5%).
5. Agricultural or Farm Supply Stores
Some farm supply stores carry SH for cleaning equipment and barns.
What to Look for When Buying SH for Pressure Washing
Not all SH products are the same. Here’s what to consider before purchasing:
1. Concentration Level
- Household bleach: 3-6% SH
- Industrial-grade SH: 10-12.5% (most common for pressure washing)
- Higher concentrations require proper dilution.
2. Freshness
SH degrades over time, so check the manufacturing date. Fresher solutions are more effective.
3. Safety Certifications
Ensure the product meets safety standards and is suitable for pressure washing applications.
4. Packaging
SH should be stored in UV-resistant containers to prevent degradation.
How to Use SH for Pressure Washing
Using SH safely and effectively requires proper handling and dilution.
1. Dilution Ratios
- House Washing: 1-2% SH (1 part SH to 4-5 parts water)
- Concrete Cleaning: 3-4% SH (stronger mix for tough stains)
- Roof Cleaning: 1.5-3% SH (varies based on algae severity)
2. Safety Precautions
- Wear gloves, goggles, and protective clothing.
- Work in a well-ventilated area to avoid inhaling fumes.
- Avoid mixing SH with ammonia or acids (produces toxic gases).
- Rinse surfaces thoroughly after cleaning.
3. Application Methods
- Downstream Injection: Uses a pressure washer’s soap nozzle to apply SH.
- Sprayer Application: A pump sprayer applies SH before pressure washing.
- Soft Washing: Low-pressure cleaning with SH for delicate surfaces.
Alternatives to SH for Pressure Washing
If SH is not available or suitable, consider these alternatives:
- Oxygenated bleach (sodium percarbonate) – Less harsh, eco-friendly.
- Vinegar solution – Mild acid for light cleaning.
- Commercial pressure washing detergents – Pre-mixed formulas.
FAQs About Buying and Using SH for Pressure Washing
1. Is SH the same as household bleach?
Yes, but household bleach is weaker (3-6% SH) compared to industrial-grade (10-12.5%).
2. Can I use pool chlorine for pressure washing?
Yes, if it’s liquid sodium hypochlorite. Avoid tablets or stabilized chlorine.
3. How long does SH last in storage?
SH loses strength over time. Store in a cool, dark place and use within 3-6 months.
4. Will SH damage plants or grass?
Yes, SH can harm vegetation. Rinse plants with water before and after application.
5. What’s the best way to apply SH for roof cleaning?
Use a soft wash system or pump sprayer to avoid damaging shingles.
6. Can I mix SH with soap for pressure washing?
Yes, but use a surfactant designed for SH to improve cling and cleaning power.
7. Is SH safe for all surfaces?
No, avoid using SH on unsealed wood, aluminum, or certain stones as it can cause damage.
Conclusion
Knowing where to buy SH for pressure washing ensures you get the right product for effective cleaning. Whether you purchase it locally or online, always prioritize safety, proper dilution, and surface compatibility. By following these guidelines, you can achieve professional-level results while protecting your property and health.
For best results, test SH on a small area before full application and follow manufacturer recommendations. Happy cleaning!
