Best Waterproof Hard Tonneau?

[bamorris2]

I have the Lomax Tri-fold on a '19 GMC and I love it. It looks good and keeps the bed drier than any other tonneau I've had.  I have no concerns keeping my clothing duffles back there when driving in the rain. I originally had some minimal drippage on the cab side corners, but a little heat gun to reshape the rubber than was smushed in shipping fixed it up. Don't expect it to be perfectly dry like a cap, but it's close. It's well made.  As for support I had a fingernail-sized paint flake come off after a few months and the sent me a whole new cover (plus shipping both ways) under warranty. The main tailgate opens and closes smoothly with the cover down, and the only negative is the mini-tailgate on the GMC will open, but not close without lifting the rear third flap. If you need the whole bed, it comes off with no tools. I can get it off by myself but its heavy so a second set of hands makes it easier to get off.
 
 

I also have the LoMax and completely agree with you on all accounts. It’s my favorite folding tonneau cover out there. And that’s coming from someone who places high priority on keeping out rain/water.

[ShamrockShooter]

I also have the LoMax and completely agree with you on all accounts. It’s my favorite folding tonneau cover out there. And that’s coming from someone who places high priority on keeping out rain/water.

Isnt the Lomax the one that is the flimsy sheet of aluminum?

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[Kachup]

2 hours ago, ShamrockShooter said:

Isnt the Lomax the one that is the flimsy sheet of aluminum?

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No it's not flimsy at all. It's around 1/8 inch, it won't flex.

[bamorris2]

No it's not flimsy at all. It's around 1/8 inch, it won't flex.

Yeah, not sure where the idea came from that it’s flimsy, but it’s not. 1/8 inch thick sounds about right, plus it has square tube framing on the underside of it.

[ShamrockShooter]

Yeah, not sure where the idea came from that it’s flimsy, but it’s not. 1/8 inch thick sounds about right, plus it has square tube framing on the underside of it.

I watched a YouTube video review of a Lomax that someone had vynal wrapped and he commented about how thin it was and had some wobble and flex to it. Never seen one in person.

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[Kachup]

16 hours ago, ShamrockShooter said:

I watched a YouTube video review of a Lomax that someone had vynal wrapped and he commented about how thin it was and had some wobble and flex to it. Never seen one in person.

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So I just measured the panel at 0.075 inch. The supporting tubes are 0.90 inch AL channel and tubes. I wouldn't stand on it, probably shouldn't even sit on it right in the middle, but IMO it has the sweet spot of low weight vs enough strength.

[AT4CK!]

On 2/15/2020 at 10:50 AM, batman900 said:

Fell in love as soon as you posted this picture and then saw that it costs 2 grand..... Now I'm sad again.

+1 for the Diamondback.  Yes, it's expensive.  But, it will last a long time.  I've had mine almost a year, and it still likes new.

 

I followed the "buy once, cry once" approaches and have no regrets.  

 

What I like about it:

 

1) Durable.  You can put 1,600 pounds on top (though I see the side rails of are only rated for 1,000 lbs).  I expect many years of use of this cover.

 

2) Utility.  My favorite thing is dropping the multi-tailgate on my GMC, which gives me an easy way to walk up and sit on top of the Diamondback.

 

3) No water issues for me, though you do need to adjust it to make it so.

 

4) It's made in the US from a great company that cares about their customers.