A gallon of F9 Efflorescence and calcium remover, but known as F9 EFLLO, in a white background.
A gallon of F9 Efflorescence and calcium remover with the old label.
Four gallons of F9 EFFLO with a white background.

F9 EFFLO - Calcium & Efflorescence Remover

Regular price$54.02
Shipping calculated at checkout.

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"F9 Calcium & Efflorescence Remover: Low-Fume, High-Efficiency Cleaner for Pros"

Looking for a muriatic acid alternative that doesn't compromise on power? Meet F9 Calcium & Efflorescence Remover! This innovative product offers the same full-strength performance as traditional acids but with significantly fewer fumes and corrosive elements. Ideal for professional use with pressure washers, this formula targets stubborn stains with precision.

Key Features:

  • Versatile Stain Removal: Highly effective on calcium carbonate, mineral stains, copper stains, and mud or red clay stains.
  • Skin-Friendly: Specifically designed to not harm intact skin.
  • Low-Fume Technology: Reduces fumes by up to 95% compared to traditional muriatic acid.
  • Highly Efficient Cleaning: Enhanced soaping action works effectively at lower concentrations.

Usage Guidelines:

  • Multi-Surface Compatibility: Excellent for tackling efflorescence, calcium, and a range of mineral-based stains on various surfaces.

Application Instructions:

  1. Pre-Cleaning: Use a commercial-grade pressure washer to prepare the surface.
  2. Dilution: Customize cleaning strength with various water-to-product ratios, ranging from 1:1 for tough stains to 12:1 for general cleaning.
  3. Application: Dampen the surface, apply the product using a sprayer, allow it to dwell while avoiding drying, and scrub if necessary.
  4. Rinse & Reapply: Assess results and reapply if needed.


  • Coverage: One gallon covers 200-400 sq. ft. on porous surfaces and up to 1,200 sq. ft. on sealed or non-porous surfaces.
  • Surface Compatibility: Suitable for concrete, brick, pavers, limestone, and more.

Safety Note: Always add acid to water for safe mixing and handling.


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