CONBOLA Heavy Duty Suction Cups 2 Pieces with Hooks Upgraded Car Camping Tie Down Suction Cup Camping Tarp Accessory with Viscous Silicone Strong Power for Car Awning Boat Camping Trap.(2 pcs)

Got a pair and one does not stick at all! Will return immediately

Fantastic! Stayed stuck for 2 weeks and still going strong! The suction is VERY strong, it takes Hercules to pry them off, and that's a good thing. These are NOT wimpy things that will come loose and fall of in a few minutes like all the others I've tried. I stuck them on the inside of my SUV's windows in the cargo area and attached bungee hooks and cargo netting pulling on them with a LOT of weight, 150 pounds of stuff pulling against them. It was asking a lot of them to hold that much weight & pressure with the straps pulling tightly on a long 2000+ mile week-long road trip. But they held perfectly! What a nice surprise they never came off even once, not loose at all, those babies were stuck and not going anywhere. I have not tried them on other surfaces but for clean glass in your car even with temp changes it holds incredibly strong! UPDATE: They are STILL stuck tight after ONE MONTH! I finally took them off and it was hard to pry them off, as in very hard, but that makes them good. One thing you will want to do is make sure you keep the plastic caps they come with covering the suction cups, as you will need to put them back on over the cups when you take them off whatever they were stuck to. This is because the inside of the cups are sticky with an adhesive type surface and without the covers they would get covered with stuff immediately and that would surely hurt their sticking next time you use them. So keep those caps, they are attached but if you cut them off like I did, make sure you keep them!

I've been camping, road-tripping, and setting up temporary rigs for over a decade, from weekend state park trips to month-long overlanding runs, and I've tried just about every "heavy-duty" suction hook on the market. Most of them either fail in heat, lose grip overnight, or can't handle real tension. These CONBOLA Suction Cups Hooks (Heavy Duty Camper Accessories / Car Camping Essentials) genuinely surprised me. First thing I noticed: the seal. A lot of suction cups claim to be heavy-duty, but they rely on a flimsy lip that curls after a few uses. These actually create a tight vacuum when you press and lock them in. I mounted two on the sides of my SUV to secure a tarp for shade during a hot Texas afternoon, and they held up to 90+ degree heat and steady wind. No slipping. No slow sagging. No midnight collapse. Pro tip from experience: clean the surface first. I wiped the paint down with alcohol before mounting. That extra 30 seconds makes the difference between "works okay" and "rock solid."

These things are super strong, got them to use for mounting a tarp on the van while traveling, they work very very well, tricky to take off but well worth it

Great suction, light weight. We used four of them to attach a temporary awning/tarp to our small RV. Even with some strong winds the suction cups did their job. Can be used for multiple applications. HIghly recommend.