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A car cover is supposed to protect paint, but the wrong cover or bad habits can do the opposite, trapping moisture, grinding in dust or flapping in the wind until the finish dulls. The first decision is simple: where will the car live? Indoor and outdoor covers are designed for completely different jobs.
Quick comparison
| Indoor cover | Outdoor cover | |
|---|---|---|
| Main job | Dust, scratches, dings | Sun, rain, snow, sap, droppings |
| Fabric | Soft, stretchy, light | Multi-layer, weather-resistant |
| Breathability | High | Moderate to high |
| Weight and bulk | Light, packs small | Heavier, bulkier |
| Fit | Snug stretch fit | Custom fit plus straps |
| Cost | $$ | $$ to $$$ |
Indoor covers
Indoor covers protect against dust, garage grime, cat paws, bumps from bikes and tools, and light scratches. They use soft, breathable fabrics, often with a fleece or flannel-like inner surface or a stretchy satin-like material that hugs the car's shape. Because they aren't built for UV or rain, they're thinner, lighter and easier to put on and take off. For a garage-kept classic, an indoor cover is all you need.
Outdoor covers
Outdoor covers take on sun, rain, snow, tree sap, bird droppings and wind. They use multi-layer fabrics that resist water and block UV while still breathing, with a soft inner layer against the paint. They're heavier and bulkier, and they rely on a close fit, elastic hems and underbody straps to stay put. They can be used indoors, but they're more cumbersome than necessary.
Why breathability matters
Moisture is the enemy under any cover. A fully waterproof, non-breathable cover traps condensation and humidity against the paint and metal, which can cause cloudy clearcoat, mildew and rust. Good covers are water-resistant but breathable, letting vapor escape. Never cover a wet car, and let the car cool after driving before covering it in humid conditions.
Protecting paint
- Wash and dry the car before covering; dust under a cover acts like sandpaper.
- Choose a cover with a soft inner layer.
- Put the cover on and take it off by folding and rolling, not dragging it across the paint.
- Keep the cover clean; wash it following the maker's instructions.
- Outdoors, avoid loose covers that flap in the wind and wear the finish.
Fit, security and wind
Custom-fit covers made for your car's shape, with mirror pockets, fit snugly and move less. That matters most outdoors, where wind makes loose covers billow and rub. Underbody straps or a cable and lock keep outdoor covers in place and deter theft. Indoors, a stretch cover's snug fit looks good and stays put with no straps.
Special situations
- Carports: an outdoor or hybrid cover, since carports still expose cars to blowing rain, dust and UV.
- Long-term storage: an indoor cover in a dry garage, plus battery maintenance and other storage steps. See long-term storage.
- Car shows: a light indoor cover packs easily for dust protection between events.
- Humid garages: a breathable indoor cover and a dehumidifier or good ventilation.
Care and maintenance
Keep covers clean following the maker's care instructions. Store covers in their bags when not in use. Check seams and elastic for wear and repair or replace covers when needed. A worn cover can let dirt in and scratch paint.
Budget considerations
Indoor covers are usually less expensive than outdoor covers. Custom-fit outdoor covers cost the most but last longer and protect better. Consider the value of your car and paint when deciding how much to spend.
Choosing a brand
Established brands offer custom-fit covers in many fabrics for both indoor and outdoor use. Compare warranties and fabric specs. See best classic car covers.
Dual-use covers
Some covers are marketed for indoor and light outdoor use. They're a compromise, useful if a car spends most of its time in a garage but occasionally sits outside at events or while traveling.
Covers and alarms
Some covers can trigger motion-sensitive alarms when wind moves them. Adjust sensitivity or use a snug cover.
Cover storage bags
Use the storage bag that comes with your cover to keep it clean between uses. A clean cover protects paint better.
The verdict
If your classic lives in a garage, buy a soft, breathable indoor cover. If it lives outside or under a carport, buy a custom-fit, breathable outdoor cover with straps. Either way, the most important habits are covering only a clean, dry car and handling the cover gently. See best classic car covers.
Covers for each situation
1. Indoor stretch car cover
$$Best for: Garage storage
A soft stretch cover hugs the car's shape and protects paint from dust and light scratches.
What we like
- Very soft
- Snug look
Watch out for
- Indoor use only
2. Outdoor breathable car cover
$$Best for: Outside or carport storage
A multi-layer breathable cover with UV and water resistance and underbody straps for outdoor protection.
What we like
- Weather protection
- Breathable
Watch out for
- Bulkier to store
Frequently asked questions
Can I use an outdoor car cover indoors?
Yes, but it's bulkier and heavier than needed. Indoor covers are softer and easier.
Can I use an indoor car cover outside?
No. Indoor covers aren't built for UV, rain or wind.
Do car covers scratch paint?
Not if the car is clean and the cover has a soft lining. Dirt and flapping cause scratches.
Are waterproof car covers good?
Water-resistant and breathable is better. Fully waterproof covers can trap moisture.
Do I need a custom-fit cover?
It's most important outdoors, where loose covers flap in the wind.