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MSP – (Mold Stain Preventer)

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MSP – (Mold Stain Preventer)

$36.95 $29.95

Rated 5.00 out of 5 based on 2 customer ratings
(2 customer reviews)


MSP’s on sale! Order now!  Here’s your chance to save big! 

Mold, Mildew, & Algae Stains Are History!

Now that you have the house and outdoor furniture sparkling clean, keep it clean with MSP!  MSP is an invisible treatment that works behind the scenes, keeping those nasty mold and mildew stains from reappearing.  MSP forms a covalent bond to the surface to which it’s applied and can lasts for up to 3 years.

MSP is environmentally-safe, and biodegradable.  Safe around people, plants, and pets, too.

Your satisfaction is guaranteed!

Works great on:

  • home siding of any composition (wood, stucco, fiber-cement, vinyl, etc.)
  • roofing of any composition (shingle, tile, shake, metal, etc.)
  • decking of any composition (wood, composite, pvc, etc.)
  • outdoor furniture of any type (wood, metal, vinyl, upholstered, etc.)
  • outdoor spa covers
  • concrete
  • boats – inside & out.
  • RVs – inside & out. (MSP helps control odors, too.)
  • Canvas or fabric awnings.

Available in one gallon container. Comes with free hose sprayer!

Product Description

Unbelievable Protection Against Mold, Mildew, and Algae Stains.


Note: MSP is not a “cleaner”.  MSP’s technology will not remove existing discoloration.  Existing stains, dirt, grime, etc. must be removed prior to applying MSP.  When applied to a clean surface, MSP will keep ugly stains from reappearing.  Works on fabrics, vinyl coverings, and hard surfaces.  Effective up to 3 years.


Using Once & Gone’s Exterior-Surface Cleaner (or alternative cleaner), thoroughly clean the surface and remove existing stains prior to applying MSP.   If you use a bleach-based cleaner (Once & Gone Exterior-Surface Cleaner is bleach-based), you must allow the surface to dry for 48 hours.  Otherwise, the bleach may neutralize the MSP.  Now that the surface is clean, you’re ready to treat it.


Thoroughly shake the container prior to use. Using a hand-pump or hand-held sprayer, mist MSP onto the clean, dry surface.  Emphasis should be made on achieving a uniform wet coat across the surface.  Allow to dry.  MSP will form a film on glass, so avoid overspray on windows.


Nothing’s better than enjoying the outdoors, your clean home, and outdoor living spaces.  You’ll appreciate what MSP does to maintain those structures and spaces, month-after-month, year-after-year.  When you’re ready to reapply, consider if you need to wash any surface dirt from the home before reapplying.

Sold in one gallon containers.  Includes free hose trigger sprayer.

Coverage: 300-700 square foot depending on application.

More Information.

2 reviews for MSP – (Mold Stain Preventer)

  1. Rated 5 out of 5

    I used this product years ago to keep mold from reappearing on a molded basement bathroom wall. The mold, which was coming back within 3 days of being cleaned, stayed away for over three years after applying this product. Have not used it outdoors, but I’m a believer! Nothing works like this product to keep mold and mildew from returning.

  2. Rated 5 out of 5

    This product has done a fantastic job on our wood deck that has had a constant problem with black mold growth. Really keeps it away.

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