10 Best Roof Moss Killer of 2025

Tested and Reviewed: Top 10 Roof Moss Killer deals with expert ratings from 8.1 to a perfect 10

May 2026 Edition

Editor's Choice

9.7

Lilly Miller

Lilly Miller Moss Out for Roofs and Walks Ready to Spray 27oz, Natural Organic

Editor's bottom line:

“This roof moss killer is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Kills moss quickly - see results in hours
Non-staining formula can be used on roofs, walks, decks and patios
Does not stain concrete, pavement, stucco, or wood
Attaches right to your garden hose no mixing

Show Price

Picked by 397 people today

9.5

BioAdvanced

BioAdvanced 2-in-1 Moss and Algae Killer for Lawns, Moss Killer for Roofs, Patios, Decks, and Deck Cleaner, 32 oz

Main Highlights

KILLS MOSS, ALGAE & MORE: 2-in-1 Moss & Algae Killer and Cleaner kills moss, algae, lichen, mold*, and mildew; No-odor formula won't stain surfaces or harm lawns when used as directed (*Not including species considered public health pests)
PROTECTS FOR MONTHS: Algae and moss killer kills within hours and provides protection for months; Protects against Algae, Lichens, Liverworts, Mildew*, Mold*, Moss, and Green Slime
2-IN-1 KILLER & CLEANER: Ideal for use on roofs, patios, decks, lawns, buildings, driveways, concrete walkways, fences, asphalt, and other listed areas
KILLS WITHIN HOURS: Moss will quickly turn yellow and then brown; Must be physically removed after treatment; Convenient and ready-to-use spray; Simply connect to a garden hose for easy application; Apply every two weeks
GET MORE FROM THE BLUE BOTTLE: From simple spot treatments to season-long protection, BioAdvanced's science-based solutions make it simple to control weeds, feed your lawn, and protect against diseases without harming the lawn, when used as directed

Show Price

9.5

Wet & Forget

Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Xtreme Reach Hose End with New & Improved Nozzle, 48 Fluid Ounces

Main Highlights

New & Improved Nozzle! Xtreme Reach Hose End Outdoor Cleaner attaches to garden hose; jet tip sprays up to 30ft to remove green and black stains caused by moss, mold, mildew, and algae on roofs and siding; fan tip provides quick application to driveways and decks; no rinsing
Spray dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours, apply when the temperature is above 55° F
Cleans over time with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
It is bleach free and non-acidic; spray 100 feet away from lakes, ponds, rivers, and streams and flush plants with water before and after application
Each bottle treats up to 2,000 square feet, heavy stained and porous surfaces will absorb more product

Show Price

9.2

Wet & Forget

Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces

Main Highlights

Wet & Forget Concentrate Outdoor Cleaner removes green and black stains caused by moss, mold, mildew, and algae, no scrubbing, no rinsing, no pressure washing, just wet it and forget
Surfaces including driveway, patio, roof, siding, deck, vinyl, wood, concrete, canvas, aluminum, and upholstery
Mix 1 part Wet & Forget with 5 parts water in a garden sprayer, spray dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours
Apply when the temperature is above 32° F; unused product can be stored mixed and ready in sprayer for future applications
Cleans with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer

Show Price

Best Value

9.0

Save 8%

Scotts

Scotts MossEx 3-in-1 Ready Spray - Hose-End Applicator, Kills Moss, Algae and Lichens, Fast Acting Moss Killer for Lawns, Roofs, Patios, 32 fl. oz.

8% Off

Main Highlights

HOW TO USE: Use this patio, lawn and roof moss killer any time during the year by connecting the sprayer to a garden hose and spraying treatment area
NON-STAINING FORMULA: This moss killer for concrete, roofs and patios contains a fast-acting liquid formula that kills within hours and does not stain your concrete or other surfaces
WHERE TO USE: This lawn moss killer can also be used on ornamental gardens, around homes and on roofs, patios, decks, sidewalks, and more (as listed)
FAST-ACTING MOSS CONTROL: Scotts MossEx 3-in-1 Ready-Spray is a fast and effective moss killer that controls moss, algae, lichens, and liverworts, helping you reclaim your green spaces
COVERAGE: One 32 fl. oz. container of Scotts MossEx 3-in-1 Ready Spray treats up to 500 sq. ft.

Show Price

8.8

Generic

6-Pack 36oz(6oz/Bag) Copper sulfate pet Safe Moss Killer for Roofs, Sidewalks etc. Makes 36 gallons. Moss Removal Powder

Main Highlights

moss removal

Show Price

8.6

Lilly Miller

Lilly Miller Moss Out For Lawns Concentrate 1 Gallon- 10009156, Neutral

Main Highlights

Fast-acting
Kills moss and prevents new growth
Does not harm lawn
Contains 35.0-percent ferric sulfate
Covers up to 2000 square feet

Show Price

8.3

Wet & Forget

Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Ready to Use, 64 Ounce

Main Highlights

Wet & Forget Ready To Use Outdoor Cleaner comes with a high-capacity trigger sprayer for quick application to smaller surfaces; removes green and black stains caused by moss, mold, mildew, and algae, no scrubbing, no rinsing, no pressure washing, just wet it and forget it on multiple surfaces including, porch steps, headstones, fountains, planters, concrete, canvas, and upholstery
Use attached sprayer apply generously to dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours, apply when the temperature is above 32° F
Cleans over time with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
It is bleach free and non-acidic; spray 100 feet away from lakes, ponds, rivers, and streams and flush plants with water before and after application
Each bottle treats 60 to 180 square feet; heavy stained and porous surfaces will absorb more product

Show Price

8.1

Lilly Miller

Lilly Miller 100503872 Moss Out Roofs Walks Ready To Spray 27-Oz (Pack of 3)

Main Highlights

Non-staining formula can be used on roofs, cedar shakes and composition singles, cedar siding, stucco, wood decks, fences, walks, bricks, stone, sidewalks, driveways and other structural surfaces
See results in hours
Covers up to 500 sq. ft.
Moss Out Complete Moss Control
27 fl.oz. - pack of 3

Show Price

8.1

Scotts

Scotts MossEx, Moss Killer for Lawns, Easy-to-Use Shaker Jug, Contains Fertilizer to Green Grass, 4.59 lbs.

Main Highlights

Scotts MossEx in an easy-to-use shaker jug kills moss without harming your lawn
These ready-to-use moss killer granules contain nutrients to help develop green grass
Apply this lawn care treatment in the winter or spring when moss is actively growing
Product is best applied when lawn is moist and tall grass has been mowed to expose low growing moss
One 4.59 lb. jug of Scotts MossEx treats 1,250 sq. ft.

Show Price

Our Best Overall Choice

Best Choice

9.7

Lilly Miller

Lilly Miller Moss Out for Roofs and Walks Ready to Spray 27oz, Natural Organic

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Kills moss quickly - see results in hours
Non-staining formula can be used on roofs, walks, decks and patios
Does not stain concrete, pavement, stucco, or wood
Attaches right to your garden hose no mixing

Show Price

Deals are Live

Special Amazon deal ends in: