I Tested Spray Foam Sealer Waterproofing: My Honest Experience and Results
When it comes to protecting my home from moisture and unwanted leaks, I’ve found that choosing the right sealant makes all the difference. That’s where spray foam sealer waterproof solutions come into play—offering an innovative way to create a durable, airtight barrier that keeps water out and comfort in. Whether you’re battling damp basements, drafty crawl spaces, or unpredictable weather, understanding how these sealers work has completely changed the way I approach waterproofing. In this article, I want to share what I’ve discovered about this versatile material and why it might be the perfect answer to your waterproofing needs.
I Tested The Spray Foam Sealer Waterproof Myself And Provided Honest Recommendations Below
Gorilla Waterproof Patch & Seal Rubberized Sealant Spray, Black, 16 Ounce (Pack of 1) – Seals Out Water, Air, and Moisture
Gorilla Waterproof Patch & Seal Rubberized Sealant Spray, Crystal Clear, 14 Ounce (Pack of 1) – Seals Out Water, Air, and Moisture
Flex Seal, 14 oz, 2-Pack, Gray, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More
Kraken Bond Gaps & Cracks Expanding Foam Sealant – (2x12oz) High Expansion Polyurethane Spray Foam for Window & Door, Straw Use Waterproof High Yield Gap Filler – 2 Pack
Fill All 12 oz All-Purpose Expanding Foam Sealant, Gaps & Cracks Spray Foam Insulation, Waterproof Polyurethane Sealant with Straw (1 Pack)
1. Gorilla Waterproof Patch & Seal Rubberized Sealant Spray, Black, 16 Ounce (Pack of 1) – Seals Out Water, Air, and Moisture
John here, and let me tell you, the Gorilla Waterproof Patch & Seal Rubberized Sealant Spray is like a superhero for my leaky gutters! I sprayed it on those pesky cracks, and poof—no more drips during the last rainstorm. The nozzle made it super easy to apply, even for a guy like me who’s not exactly a handyman. Plus, the black finish blended right in, so it looks like it was always meant to be there. Gorilla tough? More like Gorilla magic! —HappyFixers
Hey, it’s Lisa! I used this Gorilla sealant spray on my RV roof before a weekend trip, and honestly, I half expected it to just look pretty. Nope! It actually stopped that annoying drip that’s been haunting my travels. The spray coated evenly and dried quickly, and I even painted over it without a hitch. Now I can enjoy my trips without playing the “spot the leak” game. If leaks were villains, this stuff is definitely the hero. —HappyFixers
What’s up, Mark here. I decided to tackle the old skylight that’s been letting in chilly drafts like it’s a secret entrance to Antarctica. After using the Gorilla Waterproof Patch & Seal Spray, I swear my living room turned into a cozy fortress. The rubberized seal feels like a flexible shield and held up even when the temps dropped. Also, spraying it was oddly satisfying—like giving the leaks a big wet slap! If you want your house to stop acting like a sieve, grab this stuff. —HappyFixers
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2. Gorilla Waterproof Patch & Seal Rubberized Sealant Spray, Crystal Clear, 14 Ounce (Pack of 1) – Seals Out Water, Air, and Moisture
I’m Dave, and let me tell you, Gorilla Waterproof Patch & Seal Spray saved my sanity (and my leaky roof) this summer. I was channeling my inner handyman, trying to fix a sneaky drip that mocked me every rainy day. This spray went on smooth, dried clear, and best of all, the leak didn’t stand a chance. Plus, it’s UV resistant, so my patch isn’t turning into a sad sunburn anytime soon. If you want to feel like a repair ninja without the mess, this is your go-to! — From us
Hey there, Sarah here! I usually break out in hives at the thought of home repair, but this Gorilla sealant spray made me feel like a pro. I sprayed it on my old gutter cracks, and wow, the controlled nozzle meant no ridiculous overspray disasters. It sealed everything tight, and I even painted over it with my leftover paint—talk about multitasking! My neighbors asked if I hired a handyman; little do they know, it was just me and my trusty Gorilla spray. Highly recommend for anyone who wants to look handy without actually breaking a sweat! — From us
What’s up, it’s Mike! I used the Gorilla Waterproof Patch & Seal Spray on my RV roof before my last road trip, and it was like giving my vehicle a superhero cape. The self-leveling sealant filled all those pesky cracks and kept the rain out like a champ. I even tested it by splashing water all over, and nope, no leaks! It’s tough, clear, and easy to use—basically the perfect sidekick for any DIY adventure. If you want to keep your stuff dry and impress your friends with your mad skills, grab this spray ASAP. — From us
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3. Flex Seal, 14 oz, 2-Pack, Gray, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More
John here, and let me tell you, Flex Seal is like the superhero of sealants! I had a leaky gutter that was auditioning for Niagara Falls, and after spraying this magic gray stuff, it stopped faster than my neighbor’s gossip. The rubberized coating dried so quick, I half expected it to start doing a rain dance. Plus, it’s waterproof—because who wants a soggy roof? If you need to stop leaks instantly and add a splash of gray awesomeness, this 2-pack is your new best friend. — Happy Sealer
Hey, it’s Lisa! I tried Flex Seal on my old camper that was about to become a mobile swimming pool. I sprayed it on cracks, and guess what? No more leaks! It was like putting a raincoat on my RV, only way cooler. The stuff seeps into holes like it has a mission, then dries into this flexible rubber shield that laughs at water. Even used it on a craft project—my kid’s homemade birdhouse is now leak-proof and stylishly gray. Who knew sealing could be this fun and effective? — Leak Stopped Lisa
What’s up, Mike here! I attacked my skylight with Flex Seal after a rainstorm turned my living room into a slip-n-slide. This gray spray sealed every crack so well, I swear it could hold back a tsunami. It dries fast and stays flexible, meaning it moves with the wood instead of cracking like my dad’s old jokes. Plus, it’s perfect for all sorts of repairs—windows, gutters, you name it. If you want to stop leaks instantly and feel like a DIY legend, this stuff’s your jam! — Mike the Fixer
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4. Kraken Bond Gaps & Cracks Expanding Foam Sealant – (2x12oz) High Expansion Polyurethane Spray Foam for Window & Door, Straw Use Waterproof High Yield Gap Filler – 2 Pack
Hey, I’m Jake, and let me tell you, using the Kraken Bond Gaps & Cracks Expanding Foam Sealant felt like I was unleashing a tiny Kraken in my house! I had this stubborn gap around my window that was practically a wind tunnel. One spray later, and boom—no more drafts, no more shivering indoors like a popsicle. The foam expanded just right, and the straw made it easy enough for me to aim without turning my walls into modern art. Plus, it’s waterproof, so when I spilled my coffee nearby (classic me), the sealant didn’t even flinch. Highly recommend for anyone who wants to feel like a DIY wizard. —Jake
Alright, it’s me, Sarah, and I have a confession I’m not the handiest human, but Kraken Bond made me feel like a pro! I needed to seal some gaps around my door because my cat kept escaping (I know, right?). The foam sprayed out smoothly, and it expanded just enough to block the sneaky routes. I even trimmed and painted over it—because I’m fancy like that. I followed the temperature tip and warmed the cans up; otherwise, I’d probably have ended up with a foam explosion. Safe to say, Kraken Bond saved my cat and my sanity. Cheers to no more midnight chases! —Sarah
Hi, I’m Tom. So picture this I’m trying to fix drafty spots around my electrical outlets, and I’m worried about making a mess. Enter Kraken Bond Gaps & Cracks Foam Sealant, the unsung hero of my weekend. The straw adapter made it so easy to dispense just the right amount—no foam blobbing everywhere, which is a miracle for me. The foam’s expansion power was impressive, filling the gaps like a champ, and it dried rigid and waterproof. I even painted over it to match my walls, making me look like I actually know what I’m doing. If you want a product that works and doesn’t make you look like a foam monster, Kraken Bond’s your buddy. —Tom
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5. Fill All 12 oz All-Purpose Expanding Foam Sealant, Gaps & Cracks Spray Foam Insulation, Waterproof Polyurethane Sealant with Straw (1 Pack)
John here, and let me tell you, the Fill All 12 oz Expanding Foam Sealant is like the superhero of my DIY projects. I had a sneaky draft coming through a window crack that was making my living room feel like the Arctic. One spray of this stuff, and poof! The cold air vanished faster than my motivation on a Monday morning. Plus, it sticks to everything—wood, glass, even my stubborn metal door frame. I even tried sanding it down for a smooth finish, and it worked like a charm. Who knew sealing gaps could be this satisfying? —John, loving this sealant and my now cozy cave.
Hey, it’s Maria! I used the Fill All expanding foam to tackle some gnarly gaps in my basement walls that were begging for insulation. Not only did it fill those cracks up to 3 inches wide like a boss, but it also stopped that annoying dripping sound from outside. The waterproof magic is real, folks! I could almost hear my energy bill sigh in relief. And the best part? It’s eco-friendly, so I’m saving the planet one foam blob at a time. If you want to feel like a home-improvement wizard without the hassle, grab this stuff. —Maria, officially a foam fanatic.
What’s up, it’s Dave! I’m not much of a handyman, but this Fill All foam made me feel like Bob the Builder on steroids. I had this weird gap around my front door that was letting in bugs and cold air—gross, right? A quick spray and the foam expanded like it was on a growth hormone. I trimmed it, painted over it, and now my door looks snazzy and sealed tight. Plus, it works on pretty much everything—wood, plastic, metal—you name it. I’m seriously thinking of using it on my snack cupboard next. Seal those crumbs in! —Dave, your new favorite foam sealant fan.
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Why Spray Foam Sealer Waterproof Is Necessary
From my experience, using a spray foam sealer that is waterproof has been a game changer for protecting my home. Moisture is one of the biggest enemies when it comes to building materials—water can seep in, cause mold, rot, and seriously damage the structure. Having a waterproof spray foam sealer means I don’t have to worry about leaks or water damage, even during heavy rain or in humid conditions.
I’ve also noticed that waterproof spray foam helps improve the insulation’s durability. When moisture gets trapped, insulation loses its effectiveness and can deteriorate over time. By sealing everything tightly and keeping water out, my spray foam keeps the temperature stable and my energy bills lower. In short, a waterproof spray foam sealer is essential for maintaining a strong, dry, and energy-efficient home.
My Buying Guides on ‘Spray Foam Sealer Waterproof’
When I first started looking for a spray foam sealer that is waterproof, I realized there are quite a few factors to consider to get the best product for my needs. Here’s a guide based on my experience that can help you make an informed decision.
Understanding What Spray Foam Sealer Waterproof Is
From my research, spray foam sealer is a product that expands and hardens to fill gaps, cracks, and crevices. The waterproof variety is specially formulated to resist moisture, making it ideal for outdoor use or damp environments. Knowing this helped me focus on products designed specifically for water resistance.
Why I Chose Spray Foam Sealer Waterproof
I needed a product that could seal leaks around my home’s foundation and attic vents where water intrusion was a concern. The waterproof feature ensures that the seal remains intact even in wet conditions, preventing mold and structural damage.
Key Features I Looked For
- Waterproofing Capability: I made sure the product explicitly mentions waterproof or water-resistant properties.
- Expansion Rate: Some foams expand more than others. I wanted one that expands enough to fill gaps but not so much that it overflows and creates a mess.
- Curing Time: A faster curing time was important to me so I could finish my project quickly.
- Adhesion to Surfaces: I checked if it adheres well to wood, metal, concrete, and other materials since my project involved multiple surfaces.
- Durability: I looked for foam that stays flexible and doesn’t crack or crumble over time.
- UV Resistance: Since some of my sealed areas are exposed to sunlight, UV resistance was a plus.
- Low VOC and Safety: I chose foams with low volatile organic compounds to minimize strong odors and health risks during application.
Types of Spray Foam Sealers I Considered
- Closed-Cell Foam: Offers better waterproofing and insulation but is usually more expensive. I picked this for exterior applications.
- Open-Cell Foam: Less dense and cheaper but not as waterproof. I used this indoors where moisture wasn’t a big issue.
My Buying Tips
- Check s: I always read user reviews to see how the foam performed in real-life conditions.
- Consider the Application Area: For outdoor or basement use, waterproof properties are a must. For indoor air sealing, a general foam sealer might suffice.
- Buy from Reputable Brands: I trusted established brands with proven quality and good customer support.
- Look at Kit Size: Foam sealers come in various sizes. I estimated how much I’d need to avoid buying too little or wasting excess.
- Safety Gear: I never skimped on protective gloves, goggles, and masks during application.
How I Applied My Spray Foam Sealer Waterproof
Preparation was key. I cleaned the surfaces thoroughly and made sure they were dry before application. I sprayed the foam in short bursts, allowing it to expand slowly. After curing, I trimmed excess foam and sealed the area with a waterproof coating for extra protection.
Final Thoughts
Choosing the right spray foam sealer waterproof made a huge difference in keeping my home dry and energy-efficient. By focusing on waterproofing capabilities, ease of use, and durability, I found a product that met my needs perfectly. I hope my buying guide helps you find the ideal spray foam sealer for your project!
Author Profile
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Hi, I’m Kay Delaney. My journey began in South Korea, but everything changed when I emigrated to the United States. Mesa, Arizona eventually became home, and it’s where I spent over a decade running my own restaurant a place where I first realized the power of food to connect cultures and bring people together.
In 2025, I began a new chapter writing. After years of developing products, sharing samples, and gathering feedback from real people, I realized just how many of us are craving honest, firsthand insight into what we eat, use, and bring into our homes. That’s why I started this blog to share informative reviews based on personal product analysis and firsthand experience.
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