303 Mold & Mildew Stain Remover

Pulled the cover off in spring and found mildew on the seat? 303 Mold & Mildew Stain Remover takes those stains off vinyl, plastic, painted surfaces and fabric, and it does it without bleach.

Skipping bleach matters on a motorcycle. Bleach is harsh on seat vinyl and stitching, it can blotch colored fabric, and it leaves a smell. This leaves a fresh scent with no strong odor during or after use.

Which size?

• 16 oz: the seat, plastics and smaller spots. It’s the size in our Winter Storage Kit and Cover Care Kit.
• 32 oz: twice the amount, for big fabric and vinyl jobs: a whole motorcycle cover, the cover on a shelter, a boat cover, an RV awning or a garage full of stored gear.

• Removes mold and mildew stains on contact.
• No bleach.
• Works on all water-safe surfaces: vinyl, plastic, painted surfaces and fabric.
• Made in the USA.

How to use it: spray, let it work, then wipe with a clean microfiber or rinse. On a cover, work in sections. Let everything dry all the way before the bike gets covered again. Test a hidden spot first on anything you’re unsure of.

If the cover no longer sheds water once it’s clean and dry, follow up with 303 Fabric Guard. Mildew comes back where damp air sits, so if you’re cleaning a Speedway Shelter cover, keep the shelter vented on dry days. A No Damp moisture absorber helps too. More in our guide on how to make a motorcycle cover last.

Common Questions

Does 303 Mold & Mildew Stain Remover have bleach?
No. 303 says it contains no bleach and leaves a fresh scent with no strong odors. It works on vinyl, plastic, painted surfaces and fabric.

How do I get mildew off a motorcycle seat?
Spray 303 Mold & Mildew Stain Remover on the stain and wipe it off. 303 says it works on contact on any water-safe surface, including vinyl seats. Let the seat dry before you cover the bike.

Can I use mildew remover on my motorcycle cover?
Yes. 303 says it’s safe on fabric. Test a hidden spot, clean the mildew off, let the cover dry, then treat it with 303 Fabric Guard to bring back water repellency. The 32 oz is the size for a whole cover.

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.