12.5% Sodium Hypochlorite (SH) Pressure Washing Bleach
12.5% Sodium Hypochlorite (SH) Pressure Washing Bleach
- Order Policies
- Item# 99994
Call 301-519-9274 and we will have your order ready.
Couldn't load pickup availability
LOCAL PICKUP ONLY - WE DO NOT SHIP SODIUM HYPOCHLORITE. This product is sold for in-person pickup at our Gaithersburg, Maryland warehouse only. Stop by 16620 Oakmont Ave, Gaithersburg, MD 20877 or call 301-519-9274 to have your order ready when you arrive.
12.5% Sodium Hypochlorite (SH) for Pressure Washing and Soft Washing
Sodium hypochlorite, known in the trade as SH, is the workhorse chemical of the pressure washing industry. Every house wash, roof wash, and soft wash mix starts with it. If you clean siding, roofs, concrete, fences, or decks in Maryland, this is the chemical you will use more than any other.
Sun Brite Supply keeps SH at a minimum of 12.5% strength in stock at our Gaithersburg warehouse for $4.95 per gallon, local pickup only. Contractors across Montgomery County, Frederick, Rockville, Germantown, Silver Spring, and the DC and Northern Virginia area pick up fresh SH from us every week.
Why Buy SH Locally Instead of Online?
SH loses chlorine strength from the day it is made, and heat speeds that up. Chemical that sits in a warehouse or a delivery truck for weeks arrives weaker than what is printed on the label. Because we turn our SH stock over constantly, what you pick up at our counter is fresh and at full strength. That is why we do not ship it - and why local contractors get better results with our SH than with anything that spent a week in transit.
What SH Is Used For
- House washing: kills and removes algae, mold, and mildew on vinyl, brick, and painted siding
- Roof cleaning: the core of every soft wash roof mix for asphalt shingles and tile
- Concrete and flatwork: knocks out organic staining on driveways, sidewalks, and pool decks
- Fences and decks: brightens gray, weathered wood and removes organic growth
How Contractors Use It
Most contractors run SH through a downstream injector, a 12V soft wash system, or batch mix it with water and a surfactant. Dilution depends on the job: house washes run mild, roof washes run stronger. Add a surfactant so the mix clings to the surface instead of running off. Not sure on ratios? Ask at the counter - we mix these numbers every day.
Handling and Storage
Store SH in a cool, shaded spot in a sealed container and buy only what you will use in 30 to 60 days. Wear gloves and eye protection. Never mix SH with acids or other chemicals - doing so creates toxic gas. Pre-wet landscaping before you spray and rinse it after.
Frequently Asked Questions
Do you ship sodium hypochlorite?
No. We do not ship SH under any circumstances. It is available for local pickup at our Gaithersburg, MD warehouse only. This keeps the product fresh and full strength.
Where can I buy sodium hypochlorite near me in Maryland?
Sun Brite Supply at 16620 Oakmont Ave, Gaithersburg, MD 20877. We serve pressure washing contractors from Montgomery County, Frederick County, Howard County, DC, and Northern Virginia. Call 301-519-9274 and we will have your SH ready for pickup.
What strength is your sodium hypochlorite?
Our SH is a minimum of 12.5% available chlorine, and because our stock turns over constantly, it is fresh - not chlorine that decayed in a warehouse for months. It is $4.95 per gallon at the counter.
What is the difference between SH and store-bought bleach?
Household bleach is sodium hypochlorite at roughly 5-6%. Professional 12.5% SH is more than twice as strong, which means your mix ratios actually work as intended and you carry less liquid to the job.
How much SH do I need for a house wash?
It depends on your equipment and the surface. A downstream injector dilutes SH automatically; batch mixing gives you exact control. Tell us what you are washing and what you run, and we will help you dial in the mix.
Pick Up at Sun Brite Supply in Gaithersburg
We stock over 2,700 pressure washing parts, chemicals, and accessories. Grab your SH, surfactant, hoses, nozzles, and fittings in one stop. Counter help from people with over 50 years of combined pressure washing experience. Call 301-519-9274 before you head over and your order will be waiting.