FAQ – Concrobium Mold Stain Remover

What surface coverage should I expect from the Concrobium Mold Stain Remover 2-bottle system?
The regular sized Mold Stain Remover system will make approx 1.5 gallons of cleaning solution. Expect approximately 300-400 sq. ft. of coverage from this 2-bottle system. The small size Mold Stain Remover will cover approximately 100 sq. ft.
Concrobium Mold Stain Remover comes in 2 bottles – do I need both?
Yes, both bottles are required. They contain different ingredients, and both bottles must be mixed with water for the solution to work.
How do I apply the solution once mixed?
The solution is to be sprayed onto the mold-stained surface utilizing a pump sprayer or airless sprayer.
What are the ideal conditions for applying Concrobium Mold Stain Remover?
The best results are seen when the solution is applied where surface temperatures are above 50F or 10C.  Avoid direct sunlight and ensure that the product is mixed with warm to hot water (80-100F or 27-38C). Prior to using Concrobium Mold Stain Remover ensure that the surface has been cleaned of dirt and debris and maximize the surface dwell time to increase product efficacy.
How does the Concrobium mold stain remover help to physically remove mold contamination?
Concrobium Mold Stain Remover is scientifically proven to detach mold growth from surfaces allowing efficient removal by HEPA vacuuming. Please refer to our 2013 white paper, “The Liquid Tri-Phasic Mold Stain Remediation“.
Does the degree/extent of mold contamination determine the amount of Concrobium Mold Stain Remover to apply?
Yes, the greater the extent of the mold growth, the more important surface saturation is and the longer the dwell time required on the surface.
What types of surfaces can the solution be used on?
Concrobium Mold Stain Remover is safe for use on most hard, non-porous or semi-porous surfaces such as wood and composite wood, concrete, masonry, drywall, grout, fibreglass, tile, plastic, laminate, aluminum, and metal.
Why do I need to wait 30 minutes after mixing, before applying the product?
The 30 minute wait period allows the formula to reach its peak effectiveness.  Continually stirring throughout this period allows the crystals to dissolve quickly and increases the efficacy of the solution.
Will the solution damage or discolor the surface once applied?
No, when the solution is mixed it generates a peracetic acid at a low percentage of 2% so the solution is not corrosive and only targets mold and mildew stains.  We do, however, recommend testing on an inconspicuous section if there is a concern.
Once applied, will the solution leave a harmful residue on the surface?
No, once mixed the solution breaks down into water and oxygen.
What if I have hard water; will that impact the effectiveness of mixing Concrobium Mold Stain Remover?
No, mineral content that makes water ‘hard’ will not impact the product’s effectiveness.