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My fire pit’s cover leaked in the rain, so I upgraded to a heavy waterproof one.
My square fire pit is about 37 inches, and the cover it came with is tight-fitting nylon. It’s water resistant, not waterproof, so it leaks, and I’ve been warned that the finish on this kind of fire pit can tarnish. So I bought the Duck Covers Ultimate fire pit cover, 40 by 40 by 24 inches. They didn’t have one in exactly my size, so I went a little bigger. Here’s the material, the straps and how it fits.
- Feels truly waterproof
- Heavy, tent-tarp-like material
- Velcro straps let you snug it up
- Can strap under the legs if wind is a worry
- A bit baggy on a 37-inch pit
- Not an exact-size match for my fire pit
▶ Watch the full review on YouTube
Why I replaced the stock cover
It was starting to rain, which is exactly why I wanted to show this. The original cover fits snugly but lets water through, and I don’t want the finish on the fire pit to tarnish.

The material
It feels like a heavy nylon canvas, almost like the big camping tarps you put up to sit or cook under. It has tent-like stitching and it’s thick.
A band of material around the sides looks and feels a lot like Tyvek. The underside has a waxy, rubberized finish. It almost feels like a raft.

Putting it on
Each corner has two thick Velcro straps, about an inch and a half wide, with lots of Velcro. Because the cover is bigger than my pit, there’s extra material and it’s a bit baggy at first. Snugging the straps down makes it look much more form-fitting, and I don’t worry about it blowing off. You could also run the straps under the leg posts.

About the buy link
My video had no product link, and the 40-inch Ultimate isn’t listed anymore. The button goes to the Duck Covers Ultimate square fire pit cover in 44 inches, the same waterproof line. Measure your fire pit first. The listing may have other sizes.
My take
It isn’t a perfect fit, but I have a lot more confidence that rain will sit on the outside and not soak through to the fire pit.
FAQ
Is the Duck Covers Ultimate waterproof?
The fabric has a rubberized underside and feels waterproof. My old nylon cover was only water resistant.
What size did you buy?
40 x 40 x 24 inches for a roughly 37-inch square fire pit.
How does it stay on?
Thick Velcro straps at the corners let you cinch it down.
Is this an affiliate link?
Yes. The buttons are #ad affiliate links, and as an Amazon Associate I earn from qualifying purchases. It costs you nothing extra.
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