Smart ways to use suction cups around your RV

I’ve been hesitant to use (and recommend) RV products that rely on suction cups. That’s mostly because I remember (and cringe at) past failures.

But today’s suction cups are so much better than those from the past! Of course, it’s still wise to consider product reviews, follow installation directions carefully, and check the item periodically to ensure the suction cup stays put.

How it works

Suction cups are simple physics. A flexible cup pressed against a surface expels most of the air between cup and surface, creating a partial vacuum. Atmospheric pressure then pushes the cup tight against the surface, and the cup’s flexible rim forms a seal that resists sliding and releasing. Modern designs add textured rubber, levers, or screw-tight “power lock” mechanisms to increase holding force and longevity.

Why use suction cups for RVing?

Suction cups are an RVer’s friend. They’re repositionable and typically leave no marks when removed. You can forget about a hammer, nails, a screwdriver, and screws. Oh, and no more patching holes!

Suction cups also work well on the smooth plastics, laminates, glass, and tiles you find inside and outside your RV. I like to use suction cup products when we’re in a campground for an extended period of time.

How to apply

If you carefully follow the manufacturer’s directions, your suction cup item will adhere as long as you need it to. Here are some general directions to ensure your suction cup item stays put.

• Clean both surfaces thoroughly. Oil, soap film, and dust wreck the suction seal. Use isopropyl alcohol or a non-waxy cleaner, then dry with a lint-free towel.
• Warm the suction cup slightly in your hands or with a hairdryer (low heat) to make it more pliable.
• Press from the center outward to expel air, then engage any lever or twist-lock on the cup.
• If the cup uses a rubbery face, a tiny smear of petroleum jelly on the rim (not the whole face) can help form a better seal in cold conditions. However, use it sparingly so it doesn’t attract dirt.
• For showers and long-term installations, periodic checks and a re-seat after a week are good habits.

Note that many of today’s suction cup products use a lever or pump to increase suction. Follow the cleaning procedure as usual and then consult the manufacturer’s directions for application.

Outdoor considerations

Sun, salt spray, and wide temperature swings can shorten suction life. Marine-grade mounts and heavy-duty cups are built to resist UV and salt corrosion. However, even those applications need clean surfaces and regular checks.

If you plan to use suction mounts outside your RV, look for products rated for outdoor or marine use. Then test them at a low height before trusting valuables to them.

Measuring and planning

Measure the space you want to use, including lip, trim, and any curve in the wall. For shelves and caddies, measure both the available width and the vertical clearance (top-to-bottom) so bottles and items won’t hit the ceiling or door. When in doubt, tape a cardboard template to test spacing before you buy.

If you’re fitting onto a curved surface (some RV interior walls are slightly bowed), check the curvature. A small straight-edge (or the flat base of a level) will show gaps. Suction cups need flat, non-porous surfaces, so either pick a flatter spot or use smaller individual cups instead of long bars.

For paper towels and mugs, measure roll diameter and handle clearance. For tools, measure lengths and handle widths so nothing overhangs or interferes with daily use.

For heavier items, measure the diameter of the suction pad recommended by the manufacturer, and remember that larger pads distribute pull better. Test by pressing the suction cup for one minute and add a known weight (like a full half-gallon jug).

Suction-cup products for RV kitchens

Many RV countertops are suitable for suction cup products. Smooth-surfaced backsplashes also work well, as do cabinet doors and backsplashes. Here are some of my favorite suction cup products that work well in the kitchen. (I’m certain you will think of additional places in your RV to use them, as well.)

Sink caddy

These handy products hold and help to dry your kitchen sponge or dishcloth. Many styles will also accommodate detergent bottles or bottle scrubbers. Check out this page for products that will best fit your RV kitchen sink.

Utensil keeper

I love having my cooking/baking utensils close at hand, rather than in a drawer. This utensil keeper frees up counter space as well as holds spatulas and more, right where you’ll use them most.

Paper towel and spice holder

The dual design of this suction cup paper towel and spice holder frees up counter prep space while holding frequently used spices along with a roll of paper towels.

Countertop shelf

Although it’s designed to sit at the kitchen sink, this shelf also works very well on a counter. I can see placing it near the stovetop where it can keep cooking sprays from toppling over and corral additional utensils.

Living room applications

General-purpose suction cups can be used to hang your hat, dog’s leash, keys, and more in your RV’s living space.

Treat mat and pet dish

Make your furry friend happy with these treat mats. Your doggie will have no problem licking up her treats because the suction cups hold the mat securely to the floor or even the fridge.

If your dog requires a slow feeding, this dish will help. And your pup won’t push it all over the RV floor because the suction cups hold it in place.

Blackout curtains

There are many blackout curtains that fasten to your RV windows with suction cups. This allows you to easily install/remove them without permanently mounting anything to your windows or walls.

Bathroom products

Suction cups have been used in the bathroom for a long time. I remember having a suction cup holder for Dad’s bar soap. It held his Lava bar securely in place!

Here are even more suction cup applications for your RV bathroom.

Mirror

This anti-fog mirror is perfect for guys who like to shave in the shower. If your shower surround isn’t smooth, try fastening it to the glass door. You can easily remove it if necessary.

TP holder

Check out these toilet paper roll holders. If wall space is limited in your RV, consider a cupboard door nearby.

Shower mat

I like that this shower mat can be trimmed to accommodate different shower configurations. The suction cups make the mat non-slip, too. A definite plus!

Caddy

This shower caddy will contain shampoo bottles, conditioner tubes, a razor, and more. This particular choice comes as a set. I’d put one in our shower and the other on the bathroom wall for makeup and hygiene necessities.

Funny toothbrush holder

Yes, you’ll laugh every time you brush your teeth with this suction-cup toe toothbrush holder. It comes in hands-form, too.

Robe or towel hook

Many RV bathrooms lack a robe or towel hook. Ones positioned by suction cups require no drilling. They easily adhere to the wall or the glass shower door. Look here to find a hook that will match your RV’s interior decor.

Toilet brush

This is a great suction cup solution: a toilet bowl brush with a suction cup wall mount. It makes cleaning a breeze and no more accidentally tipped containers! Yay!

Bedroom applications

Many of the products I’ve mentioned can be used in an RV bedroom. Hooks can hold jackets. Shelving can be attached to a bedroom mirror and contain jewelry, spare change, and more. Blackout curtains mounted with suction cups can block unwanted light.

Laundry bag

This foldable laundry bag is held to the wall or bedroom mirror with suction cups. I like the fold-away design, and with the basket lifted off the floor, it’s easier to clean the floor.

Exterior uses for suction cup products

Several of the aforementioned suction cup products can be used outside your RV. Beach towels and swimsuits will dry when hung on hooks or suction cup towel bars.

Flag mount

This flag holder is easily affixed to the side of your RV. It will also work on the glass windshield of a motorhome. The adjustable design and aluminum alloy material make it a perfect choice.

Security mount

Use this security camera mount on the exterior of your RV while parked at your site. (Check to see that it’s compatible with your camera.)

Choose the right style

For small hanging loads, pick a simple suction cup with a hook and a good-size pad (1–2 in. diameter).

For bathroom caddies, prioritize larger cups or multiple cups per shelf and look for products with a locking lever or screw-tight mechanism.

For outdoor use, choose products explicitly rated for marine/outdoor exposure. If your RV wall has a textured finish, suction cups won’t work. Look for alternative mounting places, like cabinet backs, mirrors, glazed tile, or windows.

Pro tips

Buy spares. A cheap pack of clear suction cups in your pantry or utility drawer can bail you out if one slips.

Label the strongest cups for heavier use. Test before you trust valuables to a suction cup mount and enjoy the no-drill freedom.

Your turn

Suction cups let you try ideas, tweak placement, and remove everything without a trace when it’s time to move on. I’ve barely scratched the surface of suction cup-based products. Can you suggest additions to the list? Use the comments.

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