Harvard Chemical 3504 Flush Out Urine Salt Pretreatment – 1 Gallon
Professional mildly acidic urine decontamination pretreatment for carpet, rugs and other water-safe textile surfaces.
Important: Flush Out is a urine salt pretreatment. It is designed to be used before an enzyme or bacterial urine treatment. It is not intended to replace the follow-up digestion, extraction and odor-removal process.
Dissolves Urine Salts Before Enzyme Treatment 
Harvard Chemical Flush Out is a professional urine decontamination pretreatment formulated to help dissolve and liquefy dried urine salts and heavy urine deposits. Breaking down these mineral deposits makes the contaminated area easier to rinse, extract and treat with an enzyme-based or bacterial pet stain product.
Dried urine contamination can leave behind concentrated salts below the visible carpet surface. These deposits may remain in the carpet backing, padding, upholstery or other absorbent materials even after ordinary surface cleaning. Flush Out helps prepare the contaminated area for the next step in a complete urine stain and odor treatment procedure.
Product Benefits
- Mildly acidic urine decontamination pretreatment
- Helps dissolve and liquefy urine salts
- Loosens heavy and aged urine deposits
- Improves access for enzyme and bacterial digestants
- Low-odor formulation
- Designed for professional carpet and upholstery cleaning procedures
- Useful for pet urine, human urine and incontinence contamination
Why a Urine Salt Pretreatment Is Important
Urine contains both organic contamination and dissolved mineral salts. As the liquid dries, the salts can crystallize and become concentrated in the carpet fibers, backing, cushion and subfloor. An enzyme or bacterial odor treatment works primarily on digestible organic contamination, but hardened salt deposits can interfere with complete penetration and removal.
Flush Out is applied first to help dissolve those deposits. The area can then be rinsed or extracted and treated with the appropriate enzyme or bacterial urine digestant.
Suggested Professional Treatment Sequence
- Locate the full extent of the urine contamination.
- Test the carpet, rug or upholstery for colorfastness in an inconspicuous area.
- Apply Flush Out according to the directions printed on the product label.
- Allow sufficient contact time to soften and dissolve urine salt deposits.
- Rinse or extract the contaminated area as appropriate for the material being cleaned.
- Apply a compatible enzyme or bacterial urine stain and odor treatment.
- Allow the follow-up treatment to remain active for the time specified by its manufacturer.
Professional Cleaning Note: Severe contamination may extend through the carpet and into the cushion, tack strip, subfloor, wall base or upholstery padding. Surface spraying alone may not reach all affected materials. Complete odor correction may require subsurface treatment, cushion replacement, subfloor sealing or replacement of permanently damaged materials.
Recommended Applications
- Residential and commercial carpet
- Area rugs, when compatible with the fiber and dye system
- Water-safe upholstery and fabric
- Pet urine contamination
- Human urine and incontinence treatment
- Veterinary offices, kennels and animal-care facilities
- Hotels, nursing facilities and property restoration work
Product Specifications
| Manufacturer |
Harvard Chemical Research |
| Product Name |
Flush Out |
| Manufacturer Item Number |
3504 |
| Product Type |
Urine decontamination pretreatment |
| Container Size |
1 US gallon |
| Appearance |
Straw-colored liquid |
| Odor |
Low odor |
| pH |
Approximately 2–3 |
| Specific Gravity |
Approximately 1.06 |
| GTIN |
7119878404775 |
What You Receive
One 1-gallon container of Harvard Chemical 3504 Flush Out urine decontamination pretreatment.
Trigger sprayer, measuring cup, injection sprayer, enzyme treatment, extraction equipment and other accessories are not included unless specifically stated in the shopping-cart description.
Frequently Asked Questions
Is Flush Out an enzyme?
No. Flush Out is an acidic urine salt pretreatment. It is normally used before a compatible enzyme or bacterial digestant.
Does it remove urine odor by itself?
Its primary job is to dissolve and loosen urine salts. Complete odor correction normally requires rinsing or extraction followed by an enzyme, bacterial digestant or other professional odor-control procedure.
Can it be used on old urine contamination?
Yes. It is especially useful where urine has dried and left heavy salt deposits. Multiple treatment steps may be necessary when contamination has reached the carpet cushion or subfloor.
Can I use it on wool rugs or upholstery?
Material compatibility varies. Always inspect the cleaning label and test for colorfastness, texture change and dye stability before treating the entire area. Delicate rugs should be evaluated by a trained rug-cleaning professional.
Is the product ready to use?
Follow the dilution, application and dwell-time instructions printed on the current container label. Product formulations and manufacturer directions can change.
Safety and Use Information
- For professional cleaning use.
- Read the product label and Safety Data Sheet before use.
- Wear appropriate personal protective equipment.
- Avoid contact with eyes and skin.
- Do not mix with bleach, alkaline cleaners or other chemicals.
- Keep out of reach of children and pets.
- Test surfaces for compatibility before full application.
Factory Packaging Notice: Product labels, bottle style, cap color, liquid shade and packaging graphics can change without notice. The manufacturer may ship the current production version even when it differs cosmetically from the photograph shown.
Harvard Chemical Flush Out is a professional urine salt pretreatment used before enzyme or bacterial odor treatments. Customers researching this product frequently compare it with:
These products all serve a similar purpose: dissolving urine salt deposits and preparing contaminated carpet, upholstery, rugs, and other water-safe textiles for extraction and follow-up odor treatment. Product formulations, pH, fragrance, surfactants, and performance characteristics vary by manufacturer, so always follow the directions supplied with the specific product you purchase.
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