303 Mold & Mildew Stain Remover – 32oz

A mildewed cover is a lot more square feet than a seat. The 32 oz 303 Mold & Mildew Stain Remover is the size for big fabric and vinyl jobs: a motorcycle cover, the cover on a shelter, a boat cover, an RV awning or a garage full of stored gear.

It takes mold and mildew stains off any water-safe surface, including vinyl, plastic, painted surfaces and fabric. There’s no bleach in it, so it won’t blotch colored fabric the way bleach can, and it leaves a fresh scent instead of a chemical smell.

• Removes mold and mildew stains on contact.
• No bleach.
• Safe on all water-safe surfaces.
• Made in the USA.

For a cover: work in sections, wipe or rinse, then let it dry all the way. If the cover no longer sheds water, follow up with 303 Fabric Guard once it’s clean and dry. Test a hidden spot first.

Cleaning a Speedway Shelter cover? Mildew comes back where damp air sits, so keep the shelter vented on dry days. Our guide on how to make a motorcycle cover last has more.

Common Questions

Is the 32 oz mildew remover a better buy than the 16 oz?
If you’re cleaning a whole cover, a boat or an RV, yes. Same 303 formula, twice the amount: no bleach, safe on vinyl, plastic, paint and fabric.

Will 303 mildew remover damage fabric?
303 says it’s safe enough for fabric and works on all water-safe surfaces. Test a small hidden spot first. It has no bleach and leaves a fresh scent.

Does 303 Mold & Mildew Remover smell like bleach?
No. There’s no bleach in it, and 303 says it leaves a fresh scent with no strong odors during or after use.

WARNING: This product can expose you to chemicals including Diethanolamine,Ethylbenzene which are known to the State of California to cause cancer, and Sulfur Dioxide which is known to the State of California to cause reproductive harm. For more information go to P65Warnings.ca.gov.