303 Fabric Guard

When rain stops beading on your motorcycle cover and starts soaking in, the fabric has lost its water repellency. That is the moment to re-treat it, and the fix is simple: clean it, dry it, spray it. 303 says Fabric Guard restores water and stain repellency on clean, dry fabric to straight-from-the-factory levels.

It works on a slip-on bike cover and on your Speedway Shelter cover.

Which size?

• 16 oz: one motorcycle cover. The bottle to keep on the garage shelf.
• 32 oz: a full shelter cover, a couple of bike covers, or a second coat later.
• 1 gallon: fill a pump sprayer and do the bike covers and the shelter cover in one go. Riding clubs and shops buy this size.

• Protects against water-based and oil-based stains.
• Safe for synthetic and natural fibers, and on outdoor leather seats.
• Doesn’t change the fabric’s color, feel, flammability or breathability. Breathing matters on a cover, because moisture trapped underneath grows mildew.

How to get it right: clean the cover first and let it dry all the way. Fabric Guard won’t bond to dirt. 303 Multi-Surface Cleaner handles that step on a bike cover. Test a hidden spot, then work in even, overlapping passes.

303 doesn’t give a coverage figure, so pick the size by how much fabric you’re treating. Fabric Guard is also in our Cover Care Kit and Shelter Owner Kit.

More ways to stretch a cover’s life (UV, airing it out, patching rips early) are in our guide on how to make a motorcycle cover last.

Common Questions

How do I waterproof a motorcycle cover again?
Clean the cover, let it dry all the way, then spray 303 Fabric Guard in even passes. 303 says it restores water and stain repellency on clean, dry fabric to factory levels. Test a hidden spot first.

Will Fabric Guard change how my cover looks or breathes?
No. 303 says it doesn’t change a fabric’s color, feel, flammability or breathability. Breathing matters on a motorcycle cover for outdoor storage, since moisture trapped underneath is what grows mildew.

How much Fabric Guard do I need?
303 doesn’t give a coverage figure. The 16 oz handles one bike cover, the 32 oz suits a shelter cover or a second coat, and the gallon refills a pump sprayer for several covers. Same formula in every size.

WARNING: This product can expose you to chemicals including Ethylbenzene which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.