RMR-86 Pro Mold & Mildew Stain Remover 1 Gallon - Pro Strength

In this review the RMR-86 Pro stands out as a product aimed at professionals and serious DIYers who need fast, dependable stain removal after floods, long-term dampness, or heavy mold growth. The bottom line: it removes stubborn mold and mildew discoloration in seconds without scrubbing, making it a practical choice for contractors or homeowners tackling large, stained surfaces. Its ready-to-use, extra-strength formula delivers clear results quickly, though the strong bleach scent and professional strength mean basic precautions are necessary during use.

Key Features

• Instant stain removal: The formula uses deep-penetrating surfactants and a hybrid of sodium hypochlorite to dissolve mold and mildew stains in seconds on contact.
• Contractor grade strength: Designed for professional applications, the solution is described as significantly stronger than typical consumer products for stubborn, long-set stains.
• Ready to use: No mixing or dilution is required so users can apply it immediately with a sprayer to save time on large jobs.
• Broad surface compatibility: It is suitable for wood, concrete, brick, drywall, plywood and decks, allowing the same product to be used across multiple work areas.
• Damage mitigation: The high-strength formula is intended to remove stains left by floods and disasters, helping restore materials without aggressive sanding or replacement.
• Time and cost saver: By eliminating the need for extensive scrubbing or replacement in many cases, it can reduce labor and material costs on remediation jobs.

Who It's For

The RMR-86 Pro is best for contractors, remediation professionals, and experienced homeowners who need a no-fuss, powerful stain remover for large or severe mold and mildew discoloration. It works well where fast turnaround and visible restoration are required, such as crawlspaces, attics, floors and exterior brick.

It is less suitable for casual household spot cleaning where a milder product or fragrance-free option is preferred, or for users who cannot wear basic protective gear because the scent and active chlorine require ventilation and care.

Pros & Cons

Pros

• Highly effective at removing stubborn mold and mildew stains with little to no scrubbing.
• Ready-to-use contractor formula saves time on prep and application for large jobs.
• Works on a wide range of materials including wood, concrete, brick and drywall.
• Designed to mitigate damage after floods or heavy contamination, reducing need for replacements.

Cons

• Strong bleach-like smell that many users find unpleasant and requires good ventilation.
• Professional-strength formula calls for caution; not ideal for users seeking a mild household cleaner.

Specifications

Product	RMR-86 Pro Mold & Mildew Stain Remover
Volume	1 gallon
Formula	Ready to use, sodium hypochlorite hybrid with deep penetrating surfactants
Strength	Contractor grade, extra strength (marketed as 5x stronger)
Surfaces	Wood, concrete, brick, plywood, drywall, decks, attics, crawlspaces
Primary use	Mold and mildew stain removal after floods or heavy growth

Our Verdict

The RMR-86 Pro is a practical, value-minded choice for professionals and experienced DIY users who need fast, reliable removal of tough mold and mildew stains over large areas. Its ready-to-use, contractor-strength formula delivers visible restoration without scrubbing, making it worth the tradeoff for those who can tolerate the strong bleach scent and follow basic safety precautions.

Frequently Asked Questions

Do you need to dilute this product?
Answer. No, the RMR-86 Pro is a ready-to-use formula and does not require dilution before application.

What surfaces can it be used on?
Answer. It is safe for use on a wide range of hard and semi-porous surfaces including wood, concrete, brick, drywall, plywood and decks when used as directed.

Is ventilation necessary?
Answer. Yes, the product has a strong bleach-like odor and proper ventilation and protective equipment are recommended during use.