Where can you buy SH for pressure washing? Sodium hypochlorite, commonly shortened to SH, is usually available from local pool-supply stores, professional pressure-washing suppliers, janitorial distributors and chemical companies. Lower-concentration products may also be available from hardware stores and home-improvement retailers.
Before purchasing SH, check the active-ingredient percentage, production or lot information, container condition and Safety Data Sheet. Sodium hypochlorite is a hazardous chemical that can damage surfaces, landscaping and equipment when used incorrectly.
What Is SH in Pressure Washing?
SH stands for sodium hypochlorite, the active ingredient in many liquid bleach and pool-chlorinating products. Exterior-cleaning professionals may use it as part of a controlled cleaning process for treating algae, mildew and other organic growth.
SH is commonly associated with soft washing because the chemical treatment performs much of the cleaning work. This allows professionals to use lower water pressure on siding, shingles and other surfaces that could be damaged by aggressive pressure washing.
SH concentration varies by product. Common examples include:
- Household bleach: Commonly contains approximately 5% to 9% sodium hypochlorite
- Liquid pool chlorine: Often sold at approximately 10% to 12.5%
- Commercial sodium hypochlorite: Frequently supplied at approximately 12.5%, although other concentrations are available
Always read the product label. Do not determine concentration from the container color, product name or chlorine smell.
Where to Buy SH for Pressure Washing
Local pool-supply stores
Pool stores are often the most convenient source for homeowners and small exterior-cleaning businesses. Ask for liquid chlorine or liquid pool shock and confirm that sodium hypochlorite is the active ingredient.
Pool products may be available in one-gallon cases, refillable containers or larger commercial quantities. Inventory can be seasonal, so call before visiting.
Do not confuse liquid sodium hypochlorite with granular pool shock. Granular products commonly contain calcium hypochlorite or another active ingredient and should not be treated as a direct substitute.
Professional pressure-washing suppliers
Exterior-cleaning equipment suppliers may sell commercial-strength SH alongside soft-wash pumps, hoses, tanks, chemical-resistant fittings and application equipment.
These suppliers are useful for professional contractors because their staff may understand chemical-compatible equipment and commercial storage requirements. Some require minimum purchases or provide SH only through local warehouse pickup.
Janitorial and sanitation distributors
Commercial janitorial suppliers sometimes carry sodium hypochlorite in larger containers. Product concentration and approved uses vary, so review the label and SDS before buying.
A product sold for institutional sanitation is not automatically labeled or suitable for every exterior-cleaning application.
Chemical distributors
Chemical suppliers are generally more appropriate for established contractors purchasing drums, tanks or scheduled bulk deliveries. They may require a commercial account, suitable storage, minimum order quantities or documentation showing that the property can safely receive the product.
Bulk purchasing is rarely practical for a homeowner or occasional user because SH loses strength over time and requires careful storage.
Hardware and home-improvement stores
Hardware stores may sell household bleach or seasonal liquid pool chlorine. These products can have lower concentrations than commercial SH, and some laundry products contain fragrances, thickeners or additives that are not appropriate for exterior-cleaning equipment.
Look for plain liquid sodium hypochlorite with a clearly stated active-ingredient percentage. Avoid splashless, scented, gel and color-safe laundry products for pressure-washing applications.
Online retailers
Although some websites list sodium hypochlorite, shipping concentrated liquid can be expensive or restricted. Products listed online may be available only for warehouse pickup.
Because sodium hypochlorite gradually loses strength, a local supplier with regular inventory turnover may provide fresher product than a container that has spent an unknown amount of time in storage and transit.
Where Can You Buy SH in New Jersey?
New Jersey contractors can check pool suppliers, commercial cleaning distributors and pressure-washing equipment warehouses. Examples of suppliers currently advertising sodium hypochlorite include:
- J. Racenstein, which lists 12.5% SH for pickup at its East Rutherford warehouse with a minimum purchase requirement
- Landi Pools & Games in Vineland, which lists 12.5% sodium hypochlorite in several commercial container sizes
- Del Vel Chemical Company in Medford, which lists 12.5% sodium hypochlorite in five-gallon containers
P.M. Whitney Power Washing is not affiliated with these suppliers. Product availability, purchasing requirements and prices can change, so contact the supplier directly before traveling.
What Strength of SH Should You Buy?
The correct product depends on the surface, application equipment, type of growth and manufacturer instructions. A stronger product is not automatically a better choice.
Commercial 12.5% SH is highly concentrated and can cause significant damage when handled or applied incorrectly. Household products are weaker but may contain additives that make them unsuitable for exterior-cleaning systems.
Before buying, confirm:
- The percentage of sodium hypochlorite
- Whether it is a plain liquid or contains additives
- The product’s labeled uses
- Whether an SDS is available
- Whether your equipment is chemically compatible
- Whether the surface manufacturer permits the treatment
Do not copy a chemical ratio from an online video without considering the starting concentration, application equipment and surface being cleaned. Different downstream injectors and soft-wash systems produce different application strengths.
How Can You Tell Whether SH Is Fresh?
Sodium hypochlorite gradually loses strength, particularly when exposed to heat, direct sunlight or extended storage. A container labeled 12.5% may no longer provide its original strength if it has been stored poorly for a long period.
Ask the supplier:
- When the product was manufactured or delivered
- How quickly the inventory turns over
- How the containers are stored
- Whether lot or production information is available
Buy only the amount you can use safely within a reasonable period. Purchasing a large quantity at a lower price may not save money if the product loses strength before it is used.
What Should You Check Before Buying SH?
Read the label
Confirm the active ingredient, concentration, intended uses, warnings, first-aid instructions and storage requirements.
Request the Safety Data Sheet
The SDS explains the product’s hazards, protective-equipment recommendations, incompatible materials, spill response and disposal requirements.
Inspect the container
Do not purchase a leaking, swollen, cracked or poorly labeled container. Confirm that the cap is secure and the packaging is intended for sodium hypochlorite.
Check local purchasing requirements
Commercial suppliers may impose minimum quantities, container deposits or account requirements. Bulk distributors may serve only commercial facilities with approved storage systems.
Can You Use Pool Chlorine for Pressure Washing?
Some liquid pool-chlorinating products contain sodium hypochlorite and may be used by trained exterior-cleaning professionals when the product label, surface and equipment permit it.
However, “pool shock” is a general retail description rather than the name of one chemical. Some pool shock is granular calcium hypochlorite, while other products are liquid sodium hypochlorite.
Never assume two products are interchangeable. Check the active ingredient and physical form before purchasing.
Can You Put SH Directly Through a Pressure-Washer Pump?
Do not run sodium hypochlorite through a pressure-washer pump unless the equipment manufacturer explicitly states that the pump and internal components are compatible.
SH can corrode metals and damage seals, fittings and other unsuitable materials. Professionals commonly use chemical injectors or dedicated soft-wash equipment designed to keep concentrated chemical away from incompatible pump components.
Follow the equipment manufacturer’s instructions rather than improvising a chemical-delivery system.
How Should Sodium Hypochlorite Be Stored?
Store SH according to its label and SDS. General precautions include:
- Keep it in its original, properly labeled container
- Store it upright and secure it against tipping
- Keep it in a cool area away from direct sunlight and excessive heat
- Keep it away from children and pets
- Separate it from acids, ammonia and incompatible chemicals
- Do not transfer it into beverage or food containers
- Use secondary containment when appropriate
- Follow local disposal requirements
Do not store concentrated SH inside a home or in an occupied area. Appropriate storage requirements depend on the concentration, quantity, container and applicable regulations.
Never Mix SH With Acids or Ammonia
Never mix sodium hypochlorite with acids, ammonia or other cleaning products. These combinations can release dangerous chlorine or chloramine gases.
The Centers for Disease Control and Prevention advises never mixing bleach with other cleaners or disinfectants. Read the product label and SDS, use appropriate protective equipment and keep the work area ventilated. Review the CDC’s bleach safety guidance before handling sodium hypochlorite.
If an accidental mixture produces strong fumes, move away from the area immediately and contact emergency services or Poison Control for guidance. Do not remain in the area trying to correct the mixture yourself.
Is Buying SH Worth It for One Cleaning Project?
For a homeowner with one roof or house to clean, buying commercial SH may create more problems than it solves. The project requires chemical-compatible equipment, protective gear, surface knowledge, landscaping protection, runoff control and safe storage or disposal of the remaining product.
There are also fall, overspray and property-damage risks. A professional service already has the equipment and experience to choose the cleaning method for the surface.
Frequently Asked Questions
What does SH stand for in pressure washing?
SH stands for sodium hypochlorite, the active ingredient found in many liquid bleach and pool-chlorinating products.
Is household bleach the same as SH?
Household bleach commonly contains sodium hypochlorite, but it may have a lower concentration or contain fragrances, thickeners and other additives. Always check the label.
Is 12.5% SH stronger than household bleach?
Yes. A 12.5% sodium hypochlorite product is generally more concentrated than standard household bleach and requires careful handling, storage and application.
Can SH damage siding or paint?
Yes. Incorrect concentration, excessive dwell time, uneven application or inadequate rinsing can discolor or damage certain surfaces. Always perform a compatibility check and follow manufacturer instructions.
Can SH damage plants?
Yes. Overspray and runoff can harm landscaping. Professional cleaners use property-protection procedures before, during and after application.
Does SH expire?
Sodium hypochlorite degrades over time rather than remaining at its original strength indefinitely. Heat, sunlight and poor storage can accelerate that process.
Professional Soft Washing in Central New Jersey
SH can be purchased from pool stores, pressure-washing suppliers and commercial chemical distributors, but purchasing the product is only one part of the job. Safe exterior cleaning also requires the correct equipment, surface knowledge and property-protection process.
If your goal is a clean home rather than storing and handling concentrated chemicals, P.M. Whitney Power Washing provides professional house soft washing and soft wash roof cleaning throughout Central New Jersey.
Contact P.M. Whitney Power Washing to request an evaluation, or call 609-897-9494.
