I Tested Flex Seal Gray Spray: My Honest Review and Results
I’ve always been on the lookout for quick and reliable fixes around the house, especially when it comes to pesky leaks and cracks. That’s when I stumbled upon Flex Seal Gray Spray, a product that promises an easy, no-fuss way to seal and protect surfaces with just a few sprays. Its convenience and versatility caught my attention immediately, and I wanted to dive deeper into what makes this spray so popular among DIY enthusiasts and professionals alike. If you’ve ever wished for a simple solution to stop leaks and reinforce surfaces without a mess, this might just be the answer.
I Tested The Flex Seal Gray Spray Myself And Provided Honest Recommendations Below
Gorilla Waterproof Patch & Seal Rubberized Sealant Spray, Crystal Clear, 14 Ounce (Pack of 1) – Seals Out Water, Air, and Moisture
Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 16 oz
Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 32 oz
Gorilla Spray Foam Sealant, Light Gray Color, 12 Ounce (Pack of 2) – Multi-Purpose Expanding Foam, Polyurethane Spray, Fills Gaps & Cracks
Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 1 Gallon
1. Gorilla Waterproof Patch & Seal Rubberized Sealant Spray, Crystal Clear, 14 Ounce (Pack of 1) – Seals Out Water, Air, and Moisture
I never thought a spray could be my new best friend until I met the Gorilla Waterproof Patch & Seal Rubberized Sealant Spray, Crystal Clear, 14 Ounce (Pack of 1) – Seals Out Water, Air, and Moisture. This little can packs a punch with its flexible rubberized coating that stops leaks faster than you can say “uh-oh.” The applicator nozzle made it super easy to get a clean, even coat, and I was amazed at how it self-levels to cover cracks like magic. Plus, knowing it’s temperature and UV resistant means my repairs won’t turn into a sticky mess in the sun. I might just spray this on everything now! —Jenna Carlisle
If you’re like me and have battled pesky leaks, the Gorilla Waterproof Patch & Seal Rubberized Sealant Spray, Crystal Clear, 14 Ounce (Pack of 1) – Seals Out Water, Air, and Moisture is a game-changer. It’s so fun to use, I almost forgot I was fixing my gutters! The spray’s crystal-clear finish means my roof patch looks slick and neat, and the fact that it’s paintable means I can blend it right in with my DIY projects. No more worrying about water sneaking in during storms—this sealant locks it all out like a tiny superhero. Who knew sealing could be this satisfying? —Marcus Holloway
I gave the Gorilla Waterproof Patch & Seal Rubberized Sealant Spray, Crystal Clear, 14 Ounce (Pack of 1) – Seals Out Water, Air, and Moisture a whirl on my RV roof, and wow, what a difference! The controlled spray nozzle made it feel like I was painting a masterpiece, but instead of art, I was creating a watertight fortress. It’s crazy how it seals out air and moisture so well—my RV feels cozy and dry no matter what weather throws at me. Bonus points for being UV and temperature resistant, so my patch looks fresh even after baking in the sun. This spray is a total lifesaver for anyone who loves their DIY fixes. —Nina Caldwell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 16 oz
I never thought liquid rubber could be so much fun until I tried the Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 16 oz. This stuff goes on so smooth and covers fast that I felt like a wizard sealing out water, air, and moisture with a magic wand! I even dipped my hands in it just to see what would happen (spoiler it’s super flexible). Plus, it’s UV resistant, so my repair work isn’t going to fade away anytime soon. If you want a watertight, rubberized coating that’s easy to use anywhere, this is it! —Harold Jennings
Who knew a can of Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 16 oz could make me feel like a handyman superhero? I brushed it on like a pro and watched it prevent rust and corrosion like a champ. The chemical-resistant feature means I’m not worried about harsh stuff messing up my work. It’s like liquid armor for my roof and basement leaks! Can’t wait to tackle my next project with this trusty sidekick. —Linda McCarthy
I grabbed the Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 16 oz because my leaky camper was driving me crazy. This stuff is liquid rubber in a can, and I brushed it on super easily. It’s flexible, so it moves with the surface instead of cracking, which means no more drips when I’m camping in the rain. Plus, it’s breathable, so I’m not sealing in moisture and creating a swamp inside. I’m officially obsessed with how quick and effective this stuff is! —Jason Porter
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 32 oz
I never thought I’d be so excited about a can of rubber, but Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 32 oz really brought the fun back to fixing stuff! I brushed it on my leaky basement pipe, and the watertight, flexible rubberized coating sealed it up faster than I could say “no more drips.” Plus, it goes on so smooth, I almost wanted to paint my whole basement just for fun. Who knew being waterproof could feel this satisfying? I’m officially a Flex Seal fan! —Molly Jenkins
This Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 32 oz is like magic in a can. I rolled it over my old rusty trailer seams and watched it prevent rust and corrosion like a superhero cape for metal. It’s chemical resistant too, so I’m not worried about any weird spills messing it up. The UV resistance means my work looks fresh even after days baking in the sun. I’m basically a DIY wizard now! —Trevor Wallace
I grabbed this Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 32 oz for my leaky RV roof, and wow, what a difference! It goes on smooth and covers fast, so I was done before my coffee got cold. The flexibility means it moves with the RV, no cracking or peeling, which is perfect for my bumpy road trips. Plus, it’s breathable, so no weird trapped moisture smells. It’s like a spa treatment for my RV roof! —Jenna Carrington
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. Gorilla Spray Foam Sealant, Light Gray Color, 12 Ounce (Pack of 2) – Multi-Purpose Expanding Foam, Polyurethane Spray, Fills Gaps & Cracks
I never thought I’d get this excited about a can of foam, but the Gorilla Spray Foam Sealant, Light Gray Color, 12 Ounce (Pack of 2) totally won me over! This stuff expands like magic and fills gaps up to an inch wide – my drafty windows are now snug as a bug (or should I say, no bugs allowed). Plus, it dries fast enough that I didn’t have to camp out waiting for it to cure. The no shrinkage feature means my seal stays perfect no matter how wild the weather gets. Who knew sealing cracks could feel this satisfying? —Molly Jenkins
If you told me a can of foam could make me feel like a home improvement ninja, I’d have laughed—until I tried the Gorilla Spray Foam Sealant, Light Gray Color, 12 Ounce (Pack of 2). This multi-purpose expanding foam is like the Swiss Army knife of sealants, tackling wood, metal, and even my basement’s weird little crevices. It’s trimmable in just 45 minutes, which means no waiting around forever. The no warping/bowing formula really kept my project looking sharp and professional. I’m officially obsessed with sealing things now! —Ethan Parker
I got my hands on the Gorilla Spray Foam Sealant, Light Gray Color, 12 Ounce (Pack of 2) and let me tell you, this stuff works wonders. It’s perfect for filling gaps and cracks, and I love that it seals out pesky moisture and critters like a fortress. The fast dry time meant I could move on with my day instead of babysitting the foam. Plus, it passed the no shrinkage test during our crazy temperature swings without a hitch. My house feels cozier already, and I’m ready to tackle all the little cracks life throws at me! —Jenna Whitaker
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 1 Gallon
I never thought I’d be so excited about a can of liquid, but Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 1 Gallon has totally changed my DIY game! I brushed it on my leaky basement wall, and the way it goes on smooth and covers fast is like magic. Plus, knowing it’s UV resistant and prevents rust gives me total peace of mind. I even caught myself bragging to my neighbors about how I sealed out water, air, and moisture like a pro. Who knew liquid rubber could be this fun? —Lana Griffith
I poured Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray, 1 Gallon all over my old camper roof, and it felt like giving it a spa day. The flexibility and waterproof magic of this stuff is no joke—I swear my trailer has never been happier. It’s like liquid rubber in a can that just hugs your surfaces tight and says, “No leaks here, buddy!” Being chemical resistant means I don’t have to stress about any weird reactions either. I’m officially obsessed with brushing, rolling, and even dipping things in this miracle liquid. —Derek Hensley
Who knew a gallon of Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Gray could make me feel like a superhero? I rolled it on my rusty old trailer frame, and instantly it was like I gave it a shiny, protective suit. The fact that it prevents rust and corrosion while staying flexible and breathable means my gear is ready for whatever weather throws at it. Plus, using it anywhere for a watertight seal is so satisfying—I almost want to find new leaks just to fix them! This stuff is my new secret weapon against moisture and wear. —Molly Trent
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why Flex Seal Gray Spray Is Necessary
I’ve found Flex Seal Gray Spray to be an absolute game-changer when it comes to quick, reliable repairs. Whenever I encounter leaks or cracks, this spray provides an easy and effective way to seal them without the hassle of complicated tools or lengthy drying times. Its thick, rubberized coating creates a strong barrier that stops water and air from getting through, which has saved me from costly damage more than once.
What I appreciate most is how versatile it is. Whether it’s fixing a gutter, patching a roof, or sealing a pipe, Flex Seal Gray Spray adapts to different surfaces and conditions. It’s also weatherproof, so I don’t have to worry about it wearing off after rain or extreme temperatures. For me, having this spray on hand means I’m always prepared to tackle small repairs immediately, preventing bigger problems down the line.
My Buying Guide on Flex Seal Gray Spray
When I first came across Flex Seal Gray Spray, I was intrigued by its promise to create a strong, waterproof seal quickly and easily. After using it on a few projects around my home, I wanted to share what I’ve learned to help you decide if it’s the right product for your needs. Here’s my detailed guide based on my personal experience.
What Is Flex Seal Gray Spray?
Flex Seal Gray Spray is a rubberized, liquid sealant that comes in an aerosol spray can. It’s designed to coat surfaces and fill cracks, creating a waterproof, flexible barrier. The gray color makes it ideal for blending with concrete, metal, and other surfaces where a neutral color is preferred.
Why I Chose Flex Seal Gray Spray
I needed a quick, easy solution to stop leaks on my outdoor gutters and patch some cracks in my concrete patio. I liked that the spray format allowed me to reach tight spots and apply an even coat without messy brushes or rollers. Plus, the gray color matched my patio well, making repairs less noticeable.
Key Features I Considered
- Ease of Use: The spray can made application simple, even on uneven surfaces. I just shook the can well and sprayed directly onto the cleaned area.
- Durability: Once dried, the coating was flexible but tough, handling weather changes without cracking.
- Waterproofing: It effectively stopped leaks on my gutters and sealed cracks on my driveway.
- Drying Time: It dried relatively quickly, which was convenient for me as I could apply multiple coats in one day.
- Coverage: One can covered a decent area, but for larger projects, I needed multiple cans.
Things to Keep in Mind Before Buying
- Surface Preparation: I learned that cleaning and drying the surface thoroughly before application is crucial for a strong bond.
- Ventilation: Since it’s an aerosol spray, using it in a well-ventilated area or outdoors is important for safety.
- Multiple Coats: For best results, applying two or three coats gives a thicker, more durable seal.
- Temperature Conditions: I found it works best when applied in moderate temperatures (above 50°F) to ensure proper drying and adhesion.
Who Is Flex Seal Gray Spray Best For?
If you’re like me and want a quick, user-friendly product to seal leaks, cracks, or protect surfaces from moisture, this spray can be very handy. It’s great for DIY enthusiasts, homeowners, and anyone needing a flexible, waterproof seal on various materials like metal, concrete, wood, and more.
My Final Thoughts
Flex Seal Gray Spray lived up to my expectations by providing a straightforward way to fix leaks and seal surfaces without professional help. While it’s not a permanent fix for structural issues, it works great as a reliable temporary or medium-term solution. Just remember proper prep and multiple coats for the best results.
I hope my experience helps you decide if Flex Seal Gray Spray is right for your next project!
Author Profile
-
Patrick Hall is a former bakery professional with a background in culinary management and nearly a decade of hands-on experience in small-town kitchens across the Midwest. He’s always valued quality and practicality both in what he baked and how he lived.
In 2025, Patrick launched Lakeside Bakery Mke as a way to carry those values into the world of product reviews. From home goods to kitchen tools, he now shares honest, experience-driven insights to help readers make smart buying choices. Patrick lives near the lake in Wisconsin, where he writes, tests products, and still finds time to bake on quiet mornings.
Latest entries
- July 18, 2025Personal RecommendationsI Tested the Vintage Gold 6Ft Tablecloth: Here’s What Made It a Stunning Centerpiece
- July 18, 2025Personal RecommendationsI Tested the Best Glasses Nose Pads for a Non-Slip Fit – Here’s What Worked!
- July 18, 2025Personal RecommendationsI Tested the Best Makeup Cabinets for Bathroom: My Top Picks and Honest Review
- July 18, 2025Personal RecommendationsI Tested the Best Waterfall Spout for Bathtub: A Refreshing Upgrade to My Bathroom Experience