Last Updated:July 27, 2026
Best Sprays to Waterproof Gazebo Canopy
We’ve spoken with many homeowners and tested several products to find our favorite waterproofing solution. We’ve compiled all our research into this post so that you can quickly skip to the perfect product for you.
Star Brite Waterproof Spray Review
Our team loves the Star Brite water proofer. People have used it for years, and the protection lasts. We live in Arizona so we don’t have the most amount of rain, but we need a product that can stand up to our scorching summers.
This solution doesn’t cause cracking or damage even when the temperatures exceed well over 100 degrees. The 22 ounce bottle covers 80 square feet so it is more than enough to cover most gazebos.
It also comes in a large gallon size container that covers 465 feet if you have a lot of material to protect.
In addition to lasting for years, this spray is also amazing at repelling water even during the heaviest of storms.
The only drawback that our team has with this product is that sprayer requires multiple pumps before it starts working. I’m not sure why their company chose to use a bottle that requires priming before the solution comes out, but it’s an overall great product with a minor inconvenience.
303 Fabric Guard Review
Several of our older posts on water repellants have 303 Fabric guard as our pick for the best water repellant spray. It is an incredibly high quality product that does a stellar job at protecting fabrics. It both repels water and protects against water and oil based staining.
Our team has found literally zero flaws with the overall solution, and there was serious discussion when we moved Star Brite to be our editor’s pick.
The main reason came down to price and container size. The 303 Fabric guard comes in a 32 ounce container which enough to cover a large gazebo with extra liquid left in the bottle. It’s not enough to apply a second coat so we just kept the bottle around in case of other projects.
Scotch Guard Fabric Sealer
Scotch Guard is a well-known and very trusted brand when it comes to protecting fabric. They make a fabric sealer that maybe applicable for the southwest and other areas that don’t see a lot of cold weather or snow.
For most people though, the best Scotch Guard product would be their outdoor sealer. This is designed for all weather use. This makes our list because Scotch Guard is a great brand, and we like so many of their other products.
The big drawback with ranking it higher is that a single can will cover about 20 square feet of heavy fabric. It is an amazing product for covering light vinyl for tents or other items. For these products, a single can will product 60 square feet of fabric.
For the heavier fabric that will used in a gazebo or pergola cover, it simply soaks into the fabric requiring more solution. An 8′ x 10′ gazebo would require 4 cans of the Scotch Guard sealant whereas the same gazebo could be covered with a single bottle of the star Brite listed above.
Rust-o-Leum Shield H20 Product Review
This is a great all-purpose water repellant. It is in the same price range as the Scoth Guard. The main reason to pick this product is that it can product a very diver set of fabrics. This would be perfect if you wanted a single product to protect a small gazebo and to have other repellant left to seal your camping gear or outdoor clothes.
The Rust-o-leum can protect
- Polyester
- Cotton/Poly Blends
- Canvas
- Leather
- Suede
Questions about Water Repellant for Gazebo Covers
The section below will be a frequently asked questions from readers. If you have a question that you don’t see on the list, we’d love to hear from you. You can reach us on twitter @newawning or via our contact form.
We’re just regular homeowners who enjoy the DIY project. All our posts are taken from the perspective of what an average adult could do so we try to limit the amount of special tools or training needed when doing our research or making recommendations.
Does water repellent spray work?
Yes, without question water repellant creates a protective layer that stops the water from being absorbed into the fabric. The effectiveness will wear down overtime so we suggest reapplying it each year.
When does water repellant spray work?
According to Wikipedia (Source), the active ingredient that makes the sprays repel water is a fluoropolymer and other substances. Teflon is likely the most famous fluoropolymer so you could think of these sprays as putting a layer of Teflon over your gazebo fabric.
Just to be fair, they are not made of Teflon, but of a substance that’s chemically related.
What happens when water repellant spray doesn’t dry right away?
The sprays we recommend can take 1-2 days to dry depending on the humidity. We recommend only coating your gazebo cover if you can take it down and have it in a place that won’t get rained on until it dries.



