Best Expansion Plugs of 2025

Brian Howie Avatar
Brian Howie
Last Updated: Jan 2, 2025

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Expansion plugs are versatile and practical tools used in various industries. These plugs are designed to create a tight seal in openings or holes, preventing leaks and providing a secure closure. They are commonly used in plumbing, automotive, and construction applications. Expansion plugs come in a range of sizes and materials to suit different needs, making them an essential component for anyone requiring a reliable and efficient sealing solution. Whether it's for temporary or permanent use, expansion plugs offer a simple yet effective solution to seal openings in a wide array of projects.

At a Glance: Our Top Picks

The Hillman Group Neoprene Expansion Plug Cover #TOP 1
The Hillman Group Neoprene Expansion Plug
ftb score rating icon 9.9
The Hillman Group 58253 Neoprene Expansion Plug Cover #TOP 2
The Hillman Group 58253 Neoprene Expansion Plug
ftb score rating icon 9.8
Neoprene Expansion Plug by The Hillman Group Cover #TOP 3
Neoprene Expansion Plug by The Hillman Group
ftb score rating icon 9.6

Top 10 Expansion Plugs

#TOP 1

The Hillman Group Neoprene Expansion Plug

58255
Black
1.75 Inch
The Hillman Group Neoprene Expansion Plug Cover
The Hillman Group 58255 Neoprene Expansion Plug, 1-3/4 to 1-7/8 -Inch, 2-Pack

The Hillman Expansion Plug is designed for a secure fit in various applications. Made from high-strength neoprene rubber and steel, it ensures durability and reliability. The expansion plugs are corrosion-resistant, making them suitable for long-term use in different environments. However, it's important to note that these plugs should not be used for capping food, drinks, or medicine due to the presence of sulfur. With size options ranging from 1 to 1-7/8 inches, you can find the perfect fit for your needs, making your projects easier and more efficient.

What We Like
Durable neoprene and steel construction
Corrosion-resistant design
Secure and reliable fit
Multiple size options available
#TOP 2

The Hillman Group 58253 Neoprene Expansion Plug

58253
Black
1.5 Inch
The Hillman Group 58253 Neoprene Expansion Plug Cover
The Hillman Group 58253 Neoprene Expansion Plug, 1-1/2 to 1-5/8 -Inch, 2-Pack , Black

The Hillman Group 58253 Neoprene Expansion Plug, also known as Hillman Neoprene Expansion Plug, is a high-quality expansion plug made of high-strength neoprene rubber and steel materials. This plug provides a secure hold and is corrosion resistant, ensuring long-lasting durability. With a size range from 1"-1-1/8" to 1-3/4"-1-7/8", it can accommodate various needs. However, it is important to note that these plugs should not be used to cap food, drinks, or medicine as they contain sulfur. The Hillman Neoprene Expansion Plug is a reliable option for sealing openings and preventing leaks in a variety of applications.

What We Like
Secure hold
Corrosion resistant
#TOP 3

Neoprene Expansion Plug by The Hillman Group

58252
Black
1-3/8"
Neoprene Expansion Plug by The Hillman Group Cover
Neoprene Expansion Plug (1-3/8"-1-1/2" Size Range), Black

The Hillman Expansion Plug is designed for reliable sealing in various applications. Its secure hold ensures that you won’t have to worry about leaks or spills. Made from durable neoprene rubber and steel, this plug offers excellent strength and longevity. Additionally, it's resistant to corrosion, making it suitable for outdoor use or in challenging environments. However, it’s important to remember that these plugs should not be used with food, drinks, or medicine due to the presence of sulfur. With a size range from 1"-1-1/8" to 1-3/4"-1-7/8", you can find the perfect fit for your needs.

What We Like
Secure and reliable sealing
Durable neoprene and steel
Corrosion resistant
Multiple size options
#TOP 4

Cherne 270024 Rubber Test Ball Plug

270024
Black
2 Inch
Cherne 270024 Rubber Test Ball Plug Cover
Cherne 270024 2 in. Rubber Test Ball Pipe Plug, Black

The Cherne Test Ball Plug is designed with a natural rubber body that provides excellent expansion and memory, ensuring a reliable seal for various pipe types. You can easily use it on both round and irregular pipes, making it versatile for different applications. Its compact design allows for simple insertion through tight spaces like test tees and floor drains. Additionally, the zinc-plated steel chain and ring handle keep the plug securely in place, preventing slippage during use. With a maximum back pressure of 13 PSI, this plug is ideal for various plumbing tasks.

What We Like
Excellent sealing capability
Versatile for different pipe shapes
Easy insertion in tight spaces
Secure anchoring system
#TOP 5

The Hillman Group Neoprene Expansion Plug

58254
Black
The Hillman Group Neoprene Expansion Plug Cover
The Hillman Group 58254 Neoprene Expansion Plug, 1-5/8 to 1-3/4 -Inch, 2-Pack

The Hillman Group Neoprene Expansion Plug is a convenient and secure solution for sealing gaps in various applications. Made of durable Neoprene material, this expandable stopper provides a secure hold and ensures a tight seal. Whether you need to plug holes in plumbing pipes or seal gaps in automotive parts, this expansion plug is versatile and reliable. Its expandable design allows it to fit a range of sizes, from 1-5/8 to 1-3/4 inches. With its secure hold, you can have peace of mind knowing that your applications are sealed tightly. Made by The Hillman Group, a trusted brand, this expansion plug is a reliable choice for all your sealing needs.

What We Like
Expandable stopper
Made of Neoprene
Secure hold
#TOP 6

Oatey 33403 4-in. End of Pipe Gripper Mechanical Plug

33403
1 Count (Pack of 1)
Oatey 33403 4-in. End of Pipe Gripper Mechanical Plug Cover
Oatey 33403 4-in. End of Pipe Gripper Mechanical Plug with Galvanized Screw and Wing Nut, 4 Inch, Red

The Oatey Pipe Gripper Plug is a reliable and durable solution for sealing or holding pressure to test your piping system. Designed to fit 4-inch open-ended pipes, this plug is made with ABS glass-reinforced plates for added strength. It mechanically seals at the end of the pipe, preventing the plug from falling into the stack. With a rating of 17 PSI or 40 ft. of head pressure, it can be used in long-term applications. The plastic plug body is resistant to rust and corrosion, while the natural rubber O-ring provides excellent expansion and memory. The zinc-plated steel handle and galvanized carriage bolt prevent corrosion, ensuring the longevity of this plug.

What We Like
Reliable and durable
Prevents plug from falling into stack
Resistant to rust and corrosion
#TOP 7

The Hillman Group Neoprene Plug 58250

58250
Black
The Hillman Group Neoprene Plug 58250 Cover
The Hillman Group 58250 Neoprene Expansion Plug, 1 to 1-1/8 -Inch, 4-Pack

The Hillman Neoprene Plug is an excellent solution for anyone needing a reliable stopper. Made from durable neoprene, this expandable plug provides a secure fit, ensuring that leaks or spills are effectively contained. The plug's ability to expand allows it to fit a range of sizes, making it versatile for various applications. With its strong hold, you can have peace of mind knowing that it will stay in place, preventing any unwanted messes. This 4-pack offers great value, ensuring that you have spare plugs on hand whenever needed.

What We Like
Expandable for versatile use
Durable neoprene material
Secure and reliable hold
Cost-effective 4-pack
#TOP 8

MDMprint T-Handle Expansion Plug

MDMprint
52006-A
Gray
MDMprint T-Handle Expansion Plug Cover
Expansion Plug, T-Handle, 2-1/4 in

The MDMprint T-Handle Plug is designed for creating low-pressure seals in circular openings. Made from durable materials like brass and neoprene rubber, it ensures reliable performance. With a maximum back pressure of 12 feet of head, it can effectively handle various applications. The plug also features a maximum diameter of 2.43 inches, making it versatile for different tasks. This product is perfect for those who need a dependable solution for sealing, providing peace of mind that your openings are secure.

What We Like
Durable materials
Effective low-pressure sealing
Handles high back pressure
Versatile diameter
#TOP 9

MDMprint T-Handle Expansion Plug

MDMprint
52004-A
MDMprint T-Handle Expansion Plug Cover
Expansion Plug, T-Handle, 1-3/4 in

The MDMprint T-Handle Plug is designed to provide effective sealing for various applications. Made from durable materials such as brass, neoprene rubber, and zinc-plated steel, it ensures long-lasting performance. With a maximum diameter of 1.89 inches and a nominal size of 1 3/4 inches, it fits a range of openings securely. Additionally, it can withstand a maximum back pressure of 12 feet of head, making it a reliable choice for those needing robust performance in demanding situations. This plug is perfect for anyone looking for a dependable solution to prevent leaks.

What We Like
Durable materials for longevity
Secure fit for various openings
High back pressure tolerance
Effective sealing capability
#TOP 10

Shaw Plugs Mech Expansion Plug

Shaw Plugs
52010
Shaw Plugs Mech Expansion Plug Cover
Mech Expansion Plug, Turn-Tite, 3-1/4In

The Shaw Plugs Mech Expansion Plug is a versatile and durable solution for low-pressure sealing in circular openings. Made from a combination of brass, zinc-plated steel, and neoprene rubber, this plug is designed to provide a secure and leak-proof seal. With a minimum diameter of 3.13 inches and a maximum diameter of 3.506 inches, it can fit a wide range of openings. The Turn-Tite feature allows for easy installation and removal, making it convenient for users. Additionally, this expansion plug is capable of withstanding a maximum back pressure of 5 ft. of head, ensuring reliable performance. Made in the United States, the Shaw Plugs Mech Expansion Plug is a reliable and durable choice for various sealing applications.

What We Like
Durable
Secure and leak-proof seal
Easy installation and removal
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What are the different types of expansion plugs?

There are various types of expansion plugs, including concave expansion plugs, dome expansion plugs, Welch style expansion plugs, and core plugs. Concave expansion plugs are a cost-effective and permanent solution for sealing holes in castings or other processes.

2. Can you drive with a bad freeze plug?

In some cases, it may be possible to drive with a bad freeze plug, although it is not recommended. Freeze plugs typically cause slow leaks rather than completely failing. If you keep your engine coolant at the appropriate level and prevent your engine from overheating, you may be able to temporarily drive with a leaking freeze plug, but it is advisable to have it repaired as soon as possible.

3. Can you drive with a leaking freeze plug?

While it is possible to drive with a leaking freeze plug, it is not recommended. Freeze plugs usually cause slow leaks and can lead to engine overheating. If you choose to drive with a leaking freeze plug, it is important to keep your engine coolant at the proper level and monitor your engine's temperature closely. However, it is best to have the leak repaired as soon as possible to avoid further damage to your engine.

4. Can you reuse expansion plugs?

It is not recommended to reuse old expansion plugs. You can easily find expandable rubber plugs at auto parts stores, and they are easier to install correctly. Reusing old plugs may not provide a secure and reliable seal, so it is best to use new expansion plugs when needed.

Editor's Notes

During our expansion plug research, we found 24 expansion plug products and shortlisted 10 quality products. We collected and analyzed 9,823 customer reviews through our big data system to write the expansion plugs list. We found that most customers choose expansion plugs with an average price of $39.78.

The expansion plugs are available for purchase. We have researched hundreds of brands and picked the top brands of expansion plugs, including The Hillman Group, Cherne, Oatey, MDMprint, Shaw Plugs. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

Written by
Brian Howie Avatar

Brian Howie is a content writer and senior industrial designer. After graduation from Westminster College, he has been engaged in product design and manufacturing for 18 years. Brian Howie has always found great pleasure in designing industrial products and sharing his ideas and experience online.