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Limpiador y bloqueador de moho y hongos 303® – 16 onzas líquidas – pieza n.° 30573

Limpiador y bloqueador de moho y hongos 303® – 16 onzas líquidas – pieza n.° 30573

Precio habitual $12.79
Precio rebajado Precio habitual

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Key Features & Benefits

Dual-Action Mold & Mildew Protection

Cleans existing mold and mildew stains while forming a protective barrier that helps block future growth. This two-in-one formula restores surfaces and helps maintain a cleaner spa environment longer.

Safe for All Hot Tub Surfaces

Engineered for seamless compatibility with original mounting points for secure placement.Designed for use on vinyl covers, wood cabinets, fiberglass shells, plastic components, and more. The material-safe formula delivers effective cleaning without damaging sensitive spa finishes.

Bleach-Free, Non-Damaging Formula

Powerful cleaning performance without harsh bleach or corrosive chemicals. Won’t discolor, dry out, or prematurely age spa covers and exterior surfaces.

Long-Lasting Protective Barrier

Leaves behind a protective coating that helps prevent mold and mildew regrowth for 4–6 weeks under normal conditions, reducing maintenance frequency.

Ready-to-Use Spray Application

Convenient trigger spray requires no mixing or complicated preparation. Simply spray, wipe, and allow to dry for fast, hassle-free results.

Professional-Grade & Environmentally Conscious

Trusted by marine and RV professionals for over 40 years, this biodegradable formula delivers reliable performance while remaining safer for users and the environment.

Product Overview

  • Limpiador potente diseñado para eliminar moho, hongos, algas y manchas difíciles de superficies de vinilo, plástico y spa.

  • Deja una barrera protectora que ayuda a prevenir el crecimiento futuro de moho y hongos durante semanas después de la aplicación.

  • Seguro para usar en la mayoría de las cubiertas de spa, superficies de jacuzzis, asientos de botes, muebles de patio y telas para exteriores.

  • La fórmula sin blanqueador ni ácido garantiza una limpieza eficaz sin productos químicos agresivos ni daños a los materiales.

  • La botella rociadora fácil de usar permite una aplicación rápida en áreas problemáticas para obtener resultados rápidos.

  • Ideal para propietarios de spas y piscinas que buscan mantener un ambiente limpio, higiénico y con olor fresco.

  • Funciona tanto en superficies interiores como exteriores expuestas a alta humedad.

  • Product Type: Multi-surface cleaner

    Brand: 303® Products

    Part Number: 30570CSR

    Form: Ready-to-use liquid cleaner (16 fl oz trigger spray)

    Chemical Classification: Water-based, biodegradable surfactant cleaning solution

    Active Components: Non-ionic and anionic surfactant blend with soil-lifting agents

    pH Profile: Mild alkaline formulation (non-caustic)

    Residue Profile: Leaves no oily film or gloss-enhancing residue

    Surface Compatibility: Vinyl, rubber, plastics, fiberglass, gel coat, stainless steel, aluminum, painted surfaces, and finished leather

    Material Safety: Non-abrasive; safe for repeated use on coated and sealed surfaces

    UV Interaction: Contains no UV inhibitors (cleaning-only formulation)

    Petroleum Content: Does not contain petroleum distillates

    Silicone Content: Silicone-free formulation

    Foaming Profile: Low-to-moderate foam for controlled surface cleaning

    Dilution Capability: Can be diluted with water for light-duty cleaning applications

    Operating Environment: Marine, automotive, spa, patio, and household surface cleaning

    Chemical Resistance Post-Application: Does not alter or degrade protectant coatings when used as directed

  • For optimal results, combine 303® Mold & Mildew Cleaner + Blocker with 303® Aerospace Protectant. Here's the professional maintenance schedule:

    Monthly: Clean with 303® Mold & Mildew Cleaner + Blocker to remove any developing growth and refresh the protective barrier.

    After Cleaning: Apply 303® Aerospace Protectant to add UV protection, restore color, and create a water-repellent surface.

    As Needed: Spot-treat any areas showing early signs of mold or mildew before they spread.

    This two-step process keeps your hot tub cover looking showroom-new for years, preventing the cracking, fading, and deterioration that typically require expensive replacements.


  • The science behind 303® is simple yet effective. The formula contains powerful cleaning agents that break down mold and mildew at the molecular level, lifting stains and eliminating odors. Once the surface is clean, the blocking technology creates an invisible protective shield that prevents spores from taking hold and growing.

  • Hot Tub Covers: The #1 area where mold and mildew appear. Vinyl and fabric covers are especially vulnerable to moisture damage. Regular treatment with 303® keeps covers looking new, prevents deterioration, and extends their lifespan by years.

    Spa Cabinets: Wood and composite cabinets absorb moisture and develop mold in seams and corners. 303® penetrates deep to eliminate growth and protect against future problems.

    Steps and Handrails: High-traffic areas that accumulate moisture and body oils. The protective barrier keeps these surfaces safe and slip-resistant.

Frequently Asked Questions

  • Clean your hot tub cover every 4-6 weeks during regular use. In humid climates or shaded areas, treat covers every 3-4 weeks. The protective barrier lasts 4-6 weeks under normal conditions.
  • Yes! 303® is safe for vinyl, marine-grade fabric, Sunbrella®, and all common cover materials. Unlike bleach-based cleaners, it won't cause discoloration or premature aging.
  • No, 303® is for external surfaces only. For interior cleaning and water treatment, explore our Hot Tub Chemicals and Spa Shell Cleaners collections.
  • Yes, 303® effectively removes most mold and mildew stains, including black mold. Heavily stained covers may require 2-3 applications with gentle scrubbing.
  • 303® is specifically engineered for outdoor equipment, is bleach-free, provides long-lasting protection, won't cause UV damage, and is safe for specialized hot tub materials.
  • A 16 oz bottle provides 8-12 applications for an average hot tub cover (7' x 7'), while a 32 oz bottle covers 16-24 applications.
  • Absolutely! 303® works excellently on wood, composite materials, and synthetic cabinet panels, penetrating to eliminate mold at the root level.
  • Yes, 303® is biodegradable and environmentally responsible. Normal runoff won't harm landscaping, and it contains no harsh acids, bleach, or toxic chemicals.

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