M-1 Product Image
M-1 Product Image
Full Screen

M-1 Advanced Mildew Treatment

(1 customer review)


M-1 Advanced Mildew Treatment is a fungicide that prevents the growth of mildew, mold and algae on treated surfaces. One 6.89 fl. oz. bottle will treat a 5-gallon bucket of WOODguard or Armstrong-Clark deck stain (as well as other water and oil-based interior and exterior stains, paints and adhesives.) While the WOODguard Exterior formula already contains a fungicide, treating it with M-1 will increase its mildew resistance. We especially recommend that you treat your stain with M-1 if your home is located in shady or humid environments.

Discount: $21.99 w/ purchase of WOODguard or Armstrong-Clark (discount automatically applied in cart)


SKU: 053811000172 Category:
  • Description

    Product Description

    M-1 Advanced Mildew Treatment is proven by contractors to be the world’s finest!

    M-1 Advanced Mildew Treatment has broken the mold with cutting edge technology when battling mold, mildew, and algae. This fungicide takes up where other additives leave off without harming the environment. Plus, M-1 is compatible with virtually every available aqueous and non-aqueous paint formula tested.


    • Low odor/low VOC
    • Very high flash point (over 428°F)
    • Excellent freeze/thaw stability
    • Protects against microbial defacement
    • Minimizes discoloration
    • Clear product with no separation
    • Extremely thin viscosity


    Mix one 6.89 oz bottle into a 5 gallon bucket of WOODguard Exterior Stain or Armstrong-Clark Deck Stain before applying the stains to your home. This product can also be mixed into 5 gallon containers of other interior and exterior water-based and oil-based paints, stains, coatings, and adhesives.

    Our new alternative to MX-3

    The manufacturer of our former comparable product, MX-3 Complete Mildewcide, has gone out of business. However, we’re happy to introduce M-1 Advanced Mildew Treatment instead. It has exactly the same active ingredient in the same proportions as MX-3 and we’ve found it to be equally effective.


  • Technical Information

    Technical Information

    Do you need more information about M-1? Consult these pdf’s for detailed product and safety information from the manufacturer.

  • Reviews (1)

    1 review for M-1 Advanced Mildew Treatment

    1. Diane (verified owner)

      Our carpenter says this is the best mildewcide he has ever used on a house.

      *Note: this review was originally published on our old MX-3 product listing (MX-3 had a different manufacturer but used the exact same active ingredient as M-1.)

    Add a review

    Your email address will not be published. Required fields are marked *

  • Q&A (0)

    Be the first to ask a question about M-1 Advanced Mildew Treatment