Good Stuff Sour Shampoo is an acidic car shampoo developed for deeper contact washing when a neutral maintenance shampoo is not enough. With a pH of approximately 3.5 in concentrate, it helps remove mineral buildup, light road film and residues left on the paint.
The formula contains no waxes or polymers, so it cleans without adding another protection layer. Rich foam, good wash lubrication and a cherry fragrance make Sour Shampoo useful for coating maintenance and surface-preparation routines where stronger acidic chemistry is appropriate.
Acidic pH ~3.5Stronger chemical cleaning than a neutral maintenance shampoo
Wax & Polymer FreeCleans without adding gloss enhancers or a new protection layer
Mineral BuildupTargets mineral residue, light road film and leftover contamination
Available sizes
500 ml / 16.9 fl oz1 L / 33.8 fl oz5 L / 1.32 US gal
Acidic chemistry helps target mineral residue that a routine neutral shampoo may leave behind.
02Road Film & Residues
Supports deeper contact washing when light road film or product residue has accumulated.
03No Waxes or Polymers
Cleans the surface without adding a fresh protection or gloss-enhancing layer.
04Cherry Fragrance
A pleasant cherry scent makes the deeper-cleaning wash stage more comfortable.
— when a neutral shampoo is no longer enough
Why Use an Acidic Car Shampoo?
A neutral shampoo is the right choice for routine maintenance. Sour Shampoo is for deeper cleaning sessions where mineral buildup, road residue or accumulated contamination calls for a different chemical approach. Its acidic pH of about 3.5 in concentrate increases cleaning power during the contact-wash stage.
Because the formula is free from waxes and polymers, it is also useful when you want the wash stage to leave the paint chemically cleaner before further decontamination, correction or a new protection step.
Choose Sour ShampooFor deeper acidic contact washing, mineral buildup and surface-preparation routines.
Routine Maintenance?Choose Pure Shampoo when a regular pH-neutral contact wash is all the vehicle needs.
Deeper Contact Wash
Acidic Chemistry During Hand Washing
Sour Shampoo works during the contact stage, after loose contamination has already been removed by rinsing and pre-wash.
Surface Preparation
Clean Without Adding Protection
No waxes or polymers means the shampoo does not intentionally leave another protective layer behind before later preparation steps.
— acidic shampoo is a contact-wash product
WHERE DOES SOUR SHAMPOO FIT IN THE WASH?
01Pre-Wash First
Remove loose contamination with rinsing and, when needed, Sour Foam before contact.
02Prepare the Bucket
Add Sour Shampoo to clean water according to the product-label guidance and create a well-lubricated wash solution.
03Contact Wash
Wash panel by panel with clean microfiber media, working methodically across the vehicle.
04Rinse & Dry
Rinse thoroughly with clean water, then dry with a dedicated microfiber drying towel.
Important: Sour Shampoo is not an acidic pre-wash foam. Use Sour Foam before contact when deeper pre-wash cleaning is needed; use Sour Shampoo in the bucket during the contact-wash stage.
Detailing GuideRoad Salt, Mineral Residue & Coating Maintenance
See how mineral and salt residue can affect protected paint and why an acidic shampoo can be useful in a deeper seasonal wash.
Sour Shampoo can be one cleaning stage in a more complete preparation routine. If the goal is a new coating, continue with the necessary bonded-contamination removal, paint correction and degreasing before applying protection.
An acidic car shampoo uses a low-pH formula for deeper chemical cleaning during contact washing. Sour Shampoo has a pH of approximately 3.5 in concentrate and targets mineral buildup, light road film and residues.
What is the pH of Sour Shampoo?
Sour Shampoo is documented at approximately pH 3.5 in concentrate.
When should I use Sour Shampoo instead of Pure Shampoo?
Use Sour Shampoo when mineral buildup or accumulated residue calls for deeper acidic cleaning. For routine contact washing, choose pH-neutral Pure Shampoo.
Is Sour Shampoo the same as Sour Foam?
No. Sour Foam is an acidic pre-wash used before contact. Sour Shampoo is an acidic shampoo used in the bucket during the contact-wash stage.
Does Sour Shampoo contain waxes or polymers?
No. The product documentation describes Sour Shampoo as free from waxes and polymers, so it cleans without intentionally adding another protection layer.
Can Sour Shampoo help with mineral buildup?
Yes. Mineral buildup is one of the main types of contamination this acidic shampoo is designed to address.
Can Sour Shampoo be used on ceramic-coated cars?
The product documentation describes Sour Shampoo for deeper maintenance of coated vehicles. For a newly applied coating, follow the coating curing and maintenance instructions before using acidic chemistry.
Can Sour Shampoo be used before applying new protection?
Yes, it can be part of a preparation routine because it contains no waxes or polymers. Complete any required decontamination, correction and surface degreasing before applying a coating or sealant.
Does Sour Shampoo have a fragrance?
Yes. Sour Shampoo has a pleasant cherry fragrance.
What sizes are available?
The active range includes 500 ml / 16.9 fl oz, 1 L / 33.8 fl oz and 5 L / 1.32 US gal.
— deeper contact washing without protection additives
Acidic pH. Mineral Cleaning. No Waxes or Polymers.
Choose Good Stuff Sour Shampoo when the vehicle needs deeper contact washing for mineral buildup, road residue or surface-preparation work and a neutral shampoo is no longer enough.
01
Acidic CleaningApproximately pH 3.5 in concentrate for deeper chemical cleaning.
02
Mineral BuildupTargets mineral residue and accumulated contamination during contact washing.
03
Surface PreparationWax- and polymer-free formula fits into preparation before later protection steps.
i
Need a routine shampoo?Choose Pure Shampoo for regular pH-neutral contact washing.
Regular Contact Wash
Regular Contact Wash
Acidic Pre-Wash
Acidic Contact Wash
Acidic Pre-Wash
Acidic Contact Wash
Sour FoamAcidic pre-wash support when mineral buildup and heavier contamination need more cleaning before contact.
TYPHOON Wash PadPremium microfiber wash pad with a large working surface and controlled pressure for the Sour Shampoo contact wash.
TYPHOON Wash PadPremium microfiber wash pad with a large working surface and controlled pressure for the Sour Shampoo contact wash.
