A dripping pipe can turn a small annoyance into a major headache fast. Finding the right sealant to stop leaks around pipes, in walls, or where they enter your home is crucial for preventing water damage, drafts, and high energy bills. This guide reviews the best spray foam for leaking pipes, focusing on products that create a waterproof, airtight seal in those tricky gaps and joints. We’ve tested and compared top brands to help you choose the right one for your DIY repair.
In This Article
- 1 Quick Product Comparison
- 2 Our Top 10 Best Spray Foam For Leaking Pipes Reviews – Expert Tested & Recommended
- 2.1 1. Great Stuff Spray Foam Sealant for Gaps and Cracks in a 12-Ounce Can
- 2.2 2. BEEST Spray Foam Insulation Kit for Walls and Attic Covers 240 Board Feet
- 2.3 3. Stanley Fire Block Spray Foam Sealant for Gaps Around Pipes and Joints
- 2.4 4. BEEST Spray Foam Insulation Kit for Walls and Attic Covers 20 Board Feet
- 2.5 5. 157901 Great Stuff Expanding Spray Foam Sealant, 12 oz
- 2.6 6. Stanley Expanding Foam Sealant for Wide Gaps and Cracks in a Two-Pack
- 2.7 7. Red Devil Spray Foam Sealant for Small Gaps and Cracks in 12 Ounces
- 2.8 8. BEEST Spray Foam Insulation Kit for Walls and Attic Covers 480 Board Feet
- 2.9 9. STANLEY F 990P Supercoat Spray Foam Insulation Kit – Closed Cell Spray Foam Covers Up to 40 Sq.Ft…
- 2.10 10. Great Stuff 157911 Insulating Foam Sealant, 20 Ounce, Ivory
- 3 Complete Buying Guide for Best Spray Foam For Leaking Pipes
- 4 Frequently Asked Questions
Quick Product Comparison
Our Top 10 Best Spray Foam For Leaking Pipes Reviews – Expert Tested & Recommended
1. Great Stuff Spray Foam Sealant for Gaps and Cracks in a 12-Ounce Can
This is the go-to spray foam for countless DIYers and pros. Its 12-ounce can is the perfect size for tackling leaks around pipes where they enter your home, sealing wall cracks, and stopping drafts. The foam stops expanding when you stop spraying, giving you great control.
Key Features That Stand Out
- ✓ The “Gap and Crack Attacker” formula reduces drafts and saves energy.
- ✓ Features a Quick Stop Straw for less mess and precise application.
- ✓ The foam stops where you stop, preventing over-expansion.
- ✓ Creates a durable, long-lasting seal perfect for daily repair needs.
Why We Recommend It
We chose this as our Best Choice because it simply works. It’s reliable, easy to find, and the controlled expansion means you’re less likely to make a mess or damage surrounding materials when sealing pipe penetrations.
Best For
Homeowners looking for a trusted, all-purpose spray foam to seal common leaks and gaps around plumbing pipes, windows, and doors.
Pros and Cons
Pros:
- Excellent control with minimal dripping.
- Widely available and trusted brand.
- Creates a strong, airtight and water-resistant seal.
- Easy for beginners to use successfully.
Cons:
- The straw can clog if not cleaned immediately after use.
- Best used in one session as the can is hard to preserve.
Customer Reviews
Customer Review: “Great stuff gets the job done and easy to use. Hides holes and cracks! No smell and the color is not bad.”
Customer Review: “I have embarked on a marvelous voyage into the world of Xbox customization, thanks to the Great Stuff Gaps and Cracks Insulating Foam Sealant… This spray foam is specially designed to fill, seal, and insulate gaps and cracks.”
2. BEEST Spray Foam Insulation Kit for Walls and Attic Covers 240 Board Feet
For a larger sealing project, like insulating an entire crawl space with pipes or sealing all the attic penetrations, this BEEST kit is outstanding. It includes professional-grade equipment for a smooth, even application that provides superior thermal insulation and soundproofing.
Key Features That Stand Out
- ✓ Full DIY kit with 12 cans and a heavy-duty spray foam gun.
- ✓ High-coverage hybrid spray foam for exceptional R-value.
- ✓ Creates a seamless, monolithic seal that blocks air and moisture perfectly.
- ✓ Optimal application between 68–77°F for controlled expansion.
Why We Recommend It
This is our Editor’s Choice for big jobs. The included spray gun offers professional control, making it easier to seal long runs of pipe or large areas without the fatigue of using small straws. It’s a game-changer for serious DIY insulation.
Best For
Ambitious DIYers tackling major insulation projects, like sealing all pipe penetrations in a basement, attic, or around a new addition.
Pros and Cons
Pros:
- Professional results with the included spray gun.
- Excellent coverage and high R-value for energy savings.
- Great for large-scale leak sealing and insulation.
- Superior soundproofing and air sealing capabilities.
Cons:
- Higher upfront cost and larger commitment.
- Requires more preparation and clean-up than a simple can.
- Best for those comfortable with larger DIY projects.
Customer Reviews
Customer Review: “I used the spray foam kit on a hunting blind, and wow — what a difference. The foam filled in every seam and sealed it tight. Even in cold mornings, it holds warmth really well. I liked that the kit didn’t feel intimidating.”
Customer Review: “Very happy with the results and coverage. Gun that came with the kit was excellent- better quality than GREATSTUFF. Spray was easy to apply and the adjustment knob just made it a dream to spray from a can.”
3. Stanley Fire Block Spray Foam Sealant for Gaps Around Pipes and Joints
Safety and value meet in this excellent foam. It’s specifically designed to slow the spread of flames through concealed spaces like wall cavities where pipes run. For a very reasonable price, you get a foam that seals leaks and adds a vital layer of fire protection.
Key Features That Stand Out
- ✓ Fire-block formula helps slow flame spread in walls and ceilings.
- ✓ Ideal for sealing around pipes, wires, and joints in concealed spaces.
- ✓ Performs well in a range of ambient temperatures.
- ✓ Provides reliable insulation and air sealing.
Why We Recommend It
It earns our Best Budget pick because it offers specialized fire safety at a price close to standard foams. If you’re sealing pipes in walls or between floors, this extra protection is a smart, affordable upgrade.
Best For
Sealing pipe penetrations in walls, floors, and ceilings where building codes often require fire-blocking, or for any homeowner wanting added fire safety.
Pros and Cons
Pros:
- Affordable fire-rated protection.
- Easy to apply and expands predictably.
- Multi-use for gaps around pipes, wires, and more.
- Water-resistant seal that stops drafts.
Cons:
- Can be messy; gloves are a must.
- Primarily for interior, concealed spaces.
Customer Reviews
Customer Review: “This was easy to use and performed as hoped it would for home upgrading the replacement doors. The foam expanded to a perfect (not over expansion) seal. No worries of water infiltrating house with waterproof. Very happy.”
Customer Review: “Worked perfectly to seal a gap where AC tubing entered my house. Easy application, make sure you wear gloves… The product is inherently messy but the foam expands and fills gaps nicely. It is a low cost solution for a big problem.”
4. BEEST Spray Foam Insulation Kit for Walls and Attic Covers 20 Board Feet
This is the entry point to the BEEST professional-style system. It gives you the experience of using their spray gun and high-quality foam without committing to a massive kit. It’s perfect for sealing leaks around a cluster of pipes or a small attic area.
Key Features That Stand Out
- ✓ All-in-one kit with 1 can and a reusable spray foam gun.
- ✓ Delivers the same high R-value and seamless seal as larger kits.
- ✓ Hybrid one-component foam for easy DIY use.
- ✓ Optimal application temperature ensures controlled expansion.
Why We Recommend It
We like this for smaller projects where you want professional-grade control. The gun makes application cleaner and more precise than a straw, which is great for awkward spots around leaking pipes.
Best For
DIYers who want to try a pro-style applicator for a specific, smaller sealing job or for those who value precise control over the spray foam.
Pros and Cons
Pros:
- Professional spray gun included for better control.
- High-quality, high-performance foam.
- Less waste and cleaner application than disposable straws.
- Good way to test the system before a bigger purchase.
Cons:
- Higher cost per board foot compared to bulk kits.
- You need to thoroughly clean the gun immediately after use.
Customer Reviews
Customer Review: “I used the spray foam kit on a hunting blind, and wow — what a difference. The foam filled in every seam and sealed it tight. Even in cold mornings, it holds warmth really well.”
Customer Review: “Very happy with the results and coverage. Gun that came with the kit was excellent- better quality than GREATSTUFF. Spray was easy to apply and the adjustment knob just made it a dream.”
5. 157901 Great Stuff Expanding Spray Foam Sealant, 12 oz
This is another reliable workhorse from a trusted brand. It’s a durable, American-made expanding foam perfect for filling the larger gaps often found around pipe clusters or where old sealant has failed. It provides a very strong, long-lasting bond.
Key Features That Stand Out
- ✓ Highly durable formula for long-term leak prevention.
- ✓ Manufactured in the USA.
- ✓ 12-ounce can is ideal for substantial gaps.
- ✓ Creates a rigid, strong seal that won’t shrink or crack.
Why We Recommend It
If you have a big, stubborn gap to fill, this foam has the strength and expansion power to handle it. It’s a classic choice for a reason—it’s tough and gets the job done.
Best For
Sealing wide gaps (over 1 inch) around pipes, in foundations, or in other areas where a rigid, structural seal is needed.
Pros and Cons
Pros:
- Extremely strong and durable seal.
- Good for large, deep gaps.
- Trusted brand with consistent quality.
- Adheres well to most building materials.
Cons:
- Can be difficult to control in very small gaps.
- Like most foams, the can is single-use unless you act fast to preserve it.
Customer Reviews
Customer Review: “Love this product, fills large gaps and is very strong. Easy to use.”
Customer Review: “This is a good product if you have a big area to fill. Need to use all of it because the tip dries up and blocks the foam for the next time.”
6. Stanley Expanding Foam Sealant for Wide Gaps and Cracks in a Two-Pack
This high-yield two-pack is fantastic value for multiple or large leak-sealing projects. The foam is engineered to fill gaps up to 3 inches wide, making it ideal for the biggest holes around pipes or in foundations. Its wide temperature range adds versatility.
Key Features That Stand Out
- ✓ High-yield formula for gaps up to 3 inches wide.
- ✓ All-season performance from -103°F to +239°F.
- ✓ Two-pack provides great value for multiple jobs.
- ✓ Adheres to concrete, wood, stone, plastic, and metal.
Why We Recommend It
For the price, you get a lot of sealing power. The extreme temperature tolerance means it will perform reliably whether you’re sealing a pipe in a cold crawlspace or a hot attic.
Best For
Sealing very wide gaps around pipes, in masonry, or for outdoor applications where temperature swings are a concern.
Pros and Cons
Pros:
- Excellent value with two high-yield cans.
- Extremely wide operational temperature range.
- Fills very large gaps effectively.
- Strong adhesion to diverse materials.
Cons:
- Powerful expansion requires careful application to avoid damage.
- Can be messy; use drop cloths and prepare for cleanup.
Customer Reviews
Customer Review: “Aside from instructions/warnings on label, I recommend using a drop cloth… Very easy to use, however if planning on using again, clean tube thoroughly before drying. Seems like quality foam insulation, adhered well.”
Customer Review: “Happy with this item. It is a tall can and definitely a wide gap foam. I would not use it in an application where there is not enough surrounding strength to stop the expanding foam from doing damage. It was easy to use and apply.”
7. Red Devil Spray Foam Sealant for Small Gaps and Cracks in 12 Ounces
Don’t let a tiny leak cause a big problem. This foam is formulated specifically for small gaps and hairline cracks where pipes meet walls or floors. It’s easy to manage, sands smooth, and can be painted to blend in seamlessly after it cures.
Key Features That Stand Out
- ✓ Specifically designed for small holes, gaps, and cracks.
- ✓ Can be used indoors or outdoors.
- ✓ Sandable, paintable, and stainable for a finished look.
- ✓ Prevents drafts and insulates effectively.
Why We Recommend It
For precision work on small leaks, this foam is a winner. The fact that you can sand and paint it makes it perfect for areas where appearance matters, like around pipes in a finished basement or utility room.
Best For
Filling small, cosmetic cracks and gaps around plumbing in living areas, and for users who want a paintable, sandable finish.
Pros and Cons
Pros:
- Excellent for fine, detailed work.
- Paintable finish allows for a clean, invisible repair.
- Easy to use with minimal over-expansion.
- Good price point for small jobs.
Cons:
- Not suitable for filling large gaps (over 1 inch).
- Lower expansion means it’s not for structural fills.
Customer Reviews
Customer Review: “1st time using this kinda product. Made to use once. Good for the price. Gets the job done.”
Customer Review: “Works great. Easy to use. Used to fill in some cracks through the house. Love that I can spray on a hole and cut off the excess easily.”
8. BEEST Spray Foam Insulation Kit for Walls and Attic Covers 480 Board Feet
This is the ultimate DIY spray foam kit for a whole-house or major renovation project. With 24 cans, it provides massive coverage to insulate and air-seal an entire attic, basement, or crawl space, including sealing every single pipe penetration thoroughly.
Key Features That Stand Out
- ✓ Massive 480 sq. ft. coverage for large projects.
- ✓ Includes 24 cans and a heavy-duty professional spray gun.
- ✓ Hybrid foam provides a high R-value and seamless air barrier.
- ✓ Creates a well-insulated, energy-efficient home envelope.
Why We Recommend It
If you’re undertaking serious energy retrofit work and need to seal countless leaks around pipes and building seams, this kit offers professional-level results and the best value per board foot in the BEEST lineup.
Best For
Major DIY insulation projects, whole-house air sealing, or for contractors and very experienced homeowners doing extensive renovations.
Pros and Cons
Pros:
- Best value per board foot for large quantities.
- Comprehensive kit for a complete job.
- Superior energy savings and comfort results.
- Professional-grade equipment and foam quality.
Cons:
- Significant investment and commitment.
- Requires careful planning and execution.
- Not for small, one-off repairs.
Customer Reviews
Customer Review: “I used the spray foam kit on a hunting blind, and wow — what a difference. The foam filled in every seam and sealed it tight… I liked that the kit didn’t feel intimidating.”
Customer Review: “Very happy with the results and coverage. Gun that came with the kit was excellent- better quality than GREATSTUFF… BEEST does have a big social media presence but I’m glad their product backs it.”
9. STANLEY F 990P Supercoat Spray Foam Insulation Kit – Closed Cell Spray Foam Covers Up to 40 Sq.Ft…
This is a premium, closed-cell spray foam kit. Closed-cell foam is denser, has a higher R-value per inch, and adds structural strength and a moisture vapor barrier. It’s the top choice for sealing leaks in areas prone to dampness, like around basement pipes.
Key Features That Stand Out
- ✓ Advanced closed-cell polyurethane foam for superior performance.
- ✓ Seamless, monolithic application with no gaps.
- ✓ High R-value (R-11.32 per 2 inches) and low thermal conductivity.
- ✓ Excellent sound insulation properties.
Why We Recommend It
For the highest performance in stopping leaks, drafts, and moisture, closed-cell foam is king. This kit brings that professional capability to determined DIYers who need the best possible seal.
Best For
Sealing pipes in basements, crawl spaces, or other damp areas where moisture resistance and maximum insulation are critical.
Pros and Cons
Pros:
- Highest insulation value (R-value) per inch.
- Adds moisture barrier and structural rigidity.
- Superior air sealing and soundproofing.
- Professional-grade results.
Cons:
- More expensive than open-cell or standard foams.
- Requires careful technique and preparation.
- Less expansion than open-cell foam.
Customer Reviews
Customer Review: “Bought a 12 pack. It covered about 176 board feet… it sprays nice. I let the foam sit in my house overnight at 65* then sprayed it quick… Cleaner worked well too. I’m happy overall.”
Customer Review: “Worked great. Easy. Covered nice and stuck.”
10. Great Stuff 157911 Insulating Foam Sealant, 20 Ounce, Ivory
Need more foam than a 12-ounce can provides? This 20-ounce option gives you extra volume for bigger jobs without stepping up to a full kit. The ivory color is less noticeable than bright yellow foam, which is nice for visible areas.
Key Features That Stand Out
- ✓ Larger 20-ounce capacity for extended coverage.
- ✓ Expanding foam for insulation and air sealing.
- ✓ Easy application for various areas around the home.
- ✓ Durable and reliable for long-term leak prevention.
Why We Recommend It
It’s the perfect middle ground. When your pipe-sealing project is too big for a small can but not big enough for a kit, this larger single can saves you a trip to the store.
Best For
Medium-sized sealing projects, like sealing all the pipes in a single bathroom or kitchen remodel, or for those who prefer a larger single-use can.
Pros and Cons
Pros:
- More foam per can for better value on medium jobs.
- Trusted Great Stuff performance.
- Ivory color is less obtrusive.
- Good all-around insulator and air sealer.
Cons:
- The same preservation issue as all disposable cans.
- Heavier can may be slightly harder to control for some.
Customer Reviews
Customer Review: “The only thing I don’t like about this stuff is if you just need a little bit and then you store it away you can’t use it once that stuff hardens up in the spray nozzle… I made sure to clean out the excess material out of the nozzle… with acetone.”
Customer Review: “Easy to use, dried quick with a decent appearance. Could be cheaper but hey its 2025 what do you expect.”
Complete Buying Guide for Best Spray Foam For Leaking Pipes
Essential Factors We Consider
Choosing the right spray foam for leaking pipes isn’t just about grabbing the first can you see. Think about the gap size. Is it a tiny crack or a 3-inch hole? For small gaps, use a low-expansion foam. For big holes, you need a high-expansion foam. Consider the location. Is the pipe in a cold crawl space or a hot attic? You need a foam with a wide temperature range. For pipes inside walls, a fire-block foam adds safety. Also, think about moisture. For damp basements, a closed-cell foam acts as a moisture barrier. Always check if the foam sticks to your pipe material, like PVC, copper, or iron.
Budget Planning
Your budget depends on the project scale. For a single, small leak, a basic 12-ounce can for under $10 is perfect. If you have several leaks or a larger area, a twin-pack or 20-ounce can offers better value. For major jobs like insulating an entire basement with many pipes, investing in a multi-can DIY kit (like the BEEST kits) is cost-effective in the long run. Remember, the upfront cost of a good seal is far less than repairing water damage or high energy bills later. Don’t forget to factor in supplies like gloves, goggles, and drop cloths.
Final Thoughts
The best spray foam is the one that matches your specific leak. For most homeowners fixing a common leak, our Best Choice (Great Stuff 12-oz) is a fail-safe pick. For added fire safety on a budget, the Stanley Fire Block foam is brilliant. And for large-scale projects, the BEEST kits offer pro-level control. Read the instructions, wear protective gear, and apply in thin layers, allowing expansion between each. A little patience leads to a perfect, lasting seal.
Frequently Asked Questions
Q: Can spray foam actually stop a leaking pipe?
A: Spray foam is excellent for sealing gaps and cracks around pipes where leaks occur, like where they enter a wall or through a floor. It creates a water-resistant barrier that stops seepage and drafts. However, it is NOT a fix for a burst or actively spraying pipe. For that, you must shut off the water and repair or replace the pipe section first.
Q: How long does spray foam take to dry or cure?
A> Spray foam tack-free in about 20-30 minutes. It will be fully expanded within 1-2 hours. However, for it to completely cure and reach its full strength and water resistance, you should allow 8-24 hours. Avoid touching or trimming it until it’s fully cured.
Q: Is spray foam safe to use around plumbing pipes?
A> Yes, when used correctly. Most spray foams are safe on common pipe materials like PVC, copper, and iron. However, the expanding force can be strong. Do not apply it in a completely enclosed space around a pipe, as the expansion could put pressure on and damage the pipe. Always apply in open gaps and monitor the expansion.
Q: Can I paint over spray foam used to seal pipes?
A> Yes, but you must wait for it to fully cure first (usually 24 hours). Then, you need to trim any excess foam and apply a specialty foam sealant or a layer of drywall compound over it before painting. Some foams, like the Red Devil we reviewed, are specifically formulated to be sandable and paintable for a cleaner finish.
Stopping leaks around pipes is a simple yet vital home maintenance task. The right spray foam sealant can save you from costly repairs, improve your home’s energy efficiency, and give you peace of mind. Whether you choose the trusted all-rounder, a budget-friendly fire-block option, or a pro-style kit for a big job, you’re taking a smart step to protect your home. Review our top picks above, assess your specific needs, and get ready to seal those leaks for good. Your wallet and your home will thank you.
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