Iosso Mold & Mildew Stain Remover

Stain remover eliminates mold, mildew

By Craig Grosby

With so many mold and mildew stain removers on the market, you might wonder which one will do the best job with the least amount of effort.

I tested the Iosso Mold & Mildew Stain Remover on my boat, and I can tell you it works wonders. I had some old mildew stains on my captain’s chair that I tried to remove with a multitude of products, but I was afraid to use a bleach or chlorine-based product. Darned if this mold and mildew stain remover didn’t get it looking brand new again without the need for bleach.

Iosso Mold & Mildew Stain Remover
$15.25 for 12 ounces

Pros

    • Environment-friendly
    • Works on many fabrics and surfaces
    • Gentle on skin

Cons

    • None

As the label states, this stain remover works on mold, mildew, algae and leaf stains, bird droppings, food and drink stains, grease and oil, and more. The product is color-safe and may be used on fabric, vinyl, plastic, fiberglass, wood and other surfaces. It doesn’t contain bleach or chlorine and is biodegradable while being gentle on the skin.

The product comes packaged as a concentrated powder in four sizes: ½ ounce, 4 ounces, 12 ounces and 16 ounces. The 12-ounce container, which I tested, makes up to three gallons; one gallon covers 150 square feet. A small scoop is included for accurate measuring. One scoop makes one quart of solution. The directions are specific and should be followed carefully for best results. The white powder turns blueish when added to the recommended amount of warm water. You mix the solution until the blueish tint is gone. Only mix enough solution that you will use at one time. The tricky part is keeping the solution wet for the suggested 15 minutes for best results.

Although the product is gentle on skin, you should avoid contact with eyes and prolonged contact with skin, as indicated on the label. To be safe, I always use rubber gloves and eye protection when working with any chemicals. I recommend working in small areas at a time.

In my test trials, I used the product on vinyl, canvas, fiberglass and some pleather that was inside the cabin. In all cases the product completely removed the stains, mold, mildew and bird droppings. I also used it around my house as well, and it works better than any product I’ve used before.

Truthfully, I’m glad there’s one more mold and mildew stain remover on the market. I plan on keeping this one in my arsenal of cleaning products.


Craig Grosby recently moved from Fort Lauderdale to Pompano Beach and is enjoying the change of venue along with the challenge of navigating a new set of bridges to reach Hillsboro Inlet. The weather is great there this time of year.

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