Best Waterproof Epoxy Putties

Looking for the best waterproof epoxy putties? We’ve compiled a list of the top 10 options to help you find the perfect solution for your repair needs.

Waterproof epoxy putties are a handy fix-it tool for all kinds of repairs. They work underwater or above, making them perfect for quick, lasting fixes.

From plumbing leaks to boat repairs, these putties bond to metal, plastic, wood, and more. They’re strong, durable, and easy to use, saving you time and money.

Need a reliable repair? We’ve got you covered. Read on to find the best waterproof epoxy putty for your needs.

List of Top 10 Waterproof Epoxy Putties

Title	Best For	Price
J-B Weld 8277 WaterWeld Epoxy Putty Stick – 2 oz.	This 2 oz. J-B Weld WaterWeld Epoxy Putty Stick is perfect for anyone who needs to quickly and easily repair leaks in plumbing, fuel tanks, or even boats. It cures underwater and is safe for drinking water, making it a go-to for DIYers and professionals alike!	View on Amazon (paid link)
PC Products PC-Marine Epoxy Putty, 2oz Stick, White (25567)	This PC Products PC-Marine Epoxy Putty is perfect for anyone who needs quick, easy repairs on wet or dry surfaces. It’s great for fixing boats, pools, pipes, and more without any special tools.	View on Amazon (paid link)
LOCBONDSO Epoxy Putty, Strong Bond Epoxy Putty Stick, Fast Setting \| Waterproof & Heat Resistant, Easy Repair for All Purpose Metal, Plastic, Wood, Ceramics, Glass, Grey(2 oz.)	This epoxy putty is perfect for anyone who needs a quick, strong fix for broken items. It’s great for small repairs at home, work, or outdoors.	View on Amazon (paid link)
Flex Seal Epoxy, Ultimate Putty, Multi-Purpose, Durable, Permanent, Watertight, Long-Lasting Bond, for Automotive, Marine, Plumbing, Home, & Tool Repairs, Cures Dark Gray, 2 oz Putty Stick	Flex Seal Epoxy is perfect for anyone who needs a strong, long-lasting fix for repairs around the home, car, boat, or tools. It’s great for filling gaps, stopping leaks, and bonding almost anything, making it ideal for DIY projects and quick fixes.	View on Amazon (paid link)
J-B Weld WaterWeld, 1 Hour Cure, Epoxy Putty Stick – 2 Pack, Off-White (8277-2)	J-B Weld WaterWeld is perfect for anyone who needs a quick, strong fix that works even under water. It’s great for homeowners, DIY lovers, and pros who want to repair plumbing, boats, pools, or metal and plastic surfaces with an easy-to-use epoxy putty.	View on Amazon (paid link)
STAR BRITE Epoxy Putty Stick – Make Fast, Permanent Repairs – Even Underwater, Fiberglass, Wood, Plastic 4 OZ. (087104)	This STAR BRITE Epoxy Putty Stick is perfect for anyone who needs to make quick, strong repairs on almost anything, especially around boats, pools, or even underwater! It’s a must-have for DIYers and anyone who wants a reliable fix that’s easy to use and built to last.	View on Amazon (paid link)
Epoxy Putty – 8oz / 227g Pool Putty, 2 in 1 Underwater or Above Fast Repair, Fix Leaks, Cracks, Filling, Sculpting – 2 Part Epoxy Sculpt Clay for Metal, Tile, Concrete, Plastic, Ceramics (White)	This epoxy putty is perfect for anyone who needs a quick, strong fix for leaks, cracks, or holes. It’s great for pools, tubs, pipes, and more, working underwater or above. Easy to use and lasts a long time.	View on Amazon (paid link)
Epoxy Putty, 12oz/340g White Epoxy Sculpt Clay Fix Leaks, Cracks, Filling, Multi-Purpose Putty Stick Filler for Bonding Metal, Wood, Tile, Ceramics, Pool Plumbers Puttys Mega Adhesion & Waterproof	This epoxy putty is perfect for DIY lovers, crafters, and home repair enthusiasts. It’s great for fixing leaks, cracks, and bonding materials like metal, wood, and ceramics. Whether you’re sculpting, repairing, or creating, this multi-purpose putty is easy to use and waterproof.	View on Amazon (paid link)
J-B Weld 6 Minute Set Epoxy KwikWeld, High Strength, Waterproof, 2 Pack, Dark Grey, 50176-2	J-B Weld KwikWeld is perfect for anyone who needs a fast, strong fix for DIY projects. Whether you’re fixing metal, plastic, wood, or more, this easy-to-use epoxy gets the job done quickly and reliably.	View on Amazon (paid link)
Loctite Epoxy Multi Purpose Repair Putty , 2 oz Stick, 1 Pack	Loctite Epoxy Multi Purpose Repair Putty is perfect for anyone who needs a quick, strong fix for small repairs. Whether you’re fixing leaks, sealing pipes, or repairing items, this handy putty works on many materials and cures fast.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 waterproof epoxy putties that offer quick, durable repairs. Our guide reveals the best options for any project, from plumbing to marine fixes. We’ve analyzed expert reviews and user feedback to bring you the most reliable and effective choices. Get ready to tackle any repair with confidence – your perfect solution awaits!

1. J-B Weld 8277 WaterWeld Epoxy Putty Stick – 2 oz.

J-B Weld 8277 WaterWeld is a two-part epoxy putty stick. It is designed to be hand-mixed and cures even under water.

Once mixed, it sets in 25 minutes and cures fully in 1 hour. The color of the cured product is off-white. This epoxy can resist high temperatures and many chemicals.

It is great for repairs on plumbing, fuel tanks, boating, and more. It can be used on metal, fiberglass, and PVC surfaces. WaterWeld is NSF certified and safe for use with potable water.

Pros	Cons
Repairs underwater with ease. Sets fast, cures in 1 hour. Strong bond up to 1300 psi. Works on many materials. Safe for drinking water.	Not for large repairs – Only 2 oz, might not cover big jobs. Sets quickly – 25 minutes to set, no time for mistakes. Off-white color – May not match all surfaces or materials.

Perfect For:

This 2 oz. J-B Weld WaterWeld Epoxy Putty Stick is perfect for anyone who needs to quickly and easily repair leaks in plumbing, fuel tanks, or even boats. It cures underwater and is safe for drinking water, making it a go-to for DIYers and professionals alike!

Ready to Purchase?

View Price on Amazon (paid link)

2. PC Products PC-Marine Epoxy Putty, 2oz Stick, White (25567)

PC‑Marine epoxy putty sticks to wet surfaces. Cures white in less than 60 minutes. It bonds to tile, fiberglass, concrete, and metal.

Hand mold it for fast fixes. No mixing or tools are required.

Great for boats, spas, pools, and showers. Works on PVC, copper, wood, and grout. Return to service in under an hour.

Pros	Cons
Fast cure: service in under 60 min. Works on wet or dry surfaces. Bonds to tile, fiberglass, metal, and more. No mixing needed; hand moldable. Great for marine, pool, and plumbing repairs.	Not for large repairs, due to small 2oz size. Limited color options, only available in white. Short working time, must act fast after opening.

Perfect For:

This PC Products PC-Marine Epoxy Putty is perfect for anyone who needs quick, easy repairs on wet or dry surfaces. It’s great for fixing boats, pools, pipes, and more without any special tools.

Ready to Purchase?

View Price on Amazon (paid link)

3. LOCBONDSO Epoxy Putty, Strong Bond Epoxy Putty Stick, Fast Setting | Waterproof & Heat Resistant, Easy Repair for All Purpose Metal, Plastic, Wood, Ceramics, Glass, Grey(2 oz.)

LOCBONDSO Epoxy Putty, Strong Bond Epoxy Putty Stick, Fast Setting | Waterproof & Heat Resistant, Easy Repair for All Purpose Metal, Plastic, Wood, Ceramics, Glass, Grey(2 oz.)

LOCBONDSO Epoxy Putty is a strong, fast-setting repair tool. It’s waterproof and heat-resistant, perfect for all kinds of fixes. Use it on metal, plastic, wood, and more.

This two-part putty hardens into a tough, lasting bond. It can be drilled, painted, or shaped after it sets. It’s great for small or emergency repairs.

With a 10-15 minute cure time, it’s quick and easy to use. Fully cured in 16 hours, it’s ready for any task. Ideal for sealing, fixing, or bonding almost anything.

Pros	Cons
Strong bond for metal, plastic, wood, and more. Waterproof and heat-resistant up to 248℉. Fast-setting in 10-15 minutes, fully cures in 16 hours. Easy to use, molds into any shape for quick repairs.	Not suitable for large repairs due to small quantity. Requires quick mixing for best results, no room for mistakes. Long full cure time of 16 hours may delay projects.

Perfect For:

This epoxy putty is perfect for anyone who needs a quick, strong fix for broken items. It’s great for small repairs at home, work, or outdoors.

Ready to Purchase?

View Price on Amazon (paid link)

4. Flex Seal Epoxy, Ultimate Putty, Multi-Purpose, Durable, Permanent, Watertight, Long-Lasting Bond, for Automotive, Marine, Plumbing, Home, & Tool Repairs, Cures Dark Gray, 2 oz Putty Stick

Flex Seal Epoxy, Ultimate Putty, Multi-Purpose, Durable, Permanent, Watertight, Long-Lasting Bond, for Automotive, Marine, Plumbing, Home, & Tool Repairs, Cures Dark Gray, 2 oz Putty Stick

Flex Seal Epoxy Ultimate Putty is a strong, durable fix that lasts. It works on many surfaces and cures to a dark gray, waterproof bond.

This putty lifts and holds up to 4 tons. It sets fast and can handle heat up to 350°F. You can shape, sand, and paint it once dry.

It resists impact, chemicals, and fuel. Use it indoors or outdoors. Perfect for cars, boats, pipes, and home repairs.

Pros	Cons
Holds 4 tons with just one 2-ounce stick. Withstands heat up to 350°F once fully cured. Waterproof and durable for extreme indoor and outdoor use. Adheres to most surfaces, filling gaps and cracks easily.	Small size may not cover very large repairs quickly Dark gray color might not match all surfaces Can be tricky to mold before it sets

Perfect For:

Flex Seal Epoxy is perfect for anyone who needs a strong, long-lasting fix for repairs around the home, car, boat, or tools. It’s great for filling gaps, stopping leaks, and bonding almost anything, making it ideal for DIY projects and quick fixes.

Ready to Purchase?

View Price on Amazon (paid link)

5. J-B Weld WaterWeld, 1 Hour Cure, Epoxy Putty Stick – 2 Pack, Off-White (8277-2)

J-B Weld WaterWeld is your go-to for quick underwater repairs. This two-part epoxy putty is easy to mix and works on plumbing, tanks, and more. It’s even safe for drinking water.

Get a strong bond in just 1 hour. It holds up to 300°F and resists chemicals.

Pros	Cons
Cures underwater for fast, reliable repairs. Sets in 25 minutes; fully cures in 1 hour. Strong bond with 1300 PSI lap shear strength. Resists high heat up to 350°F (176°C). Works on metal, plastic, fiberglass, and more.	Curing time may be too long for urgent fixes. Limited color options might not match all repairs. Requires hand mixing, which can be messy.

Perfect For:

J-B Weld WaterWeld is perfect for anyone who needs a quick, strong fix that works even under water. It’s great for homeowners, DIY lovers, and pros who want to repair plumbing, boats, pools, or metal and plastic surfaces with an easy-to-use epoxy putty.

Ready to Purchase?

View Price on Amazon (paid link)

6. STAR BRITE Epoxy Putty Stick – Make Fast, Permanent Repairs – Even Underwater, Fiberglass, Wood, Plastic 4 OZ. (087104)

The STAR BRITE Epoxy Putty Stick is perfect for fast repairs. It works on wet or dry surfaces.

It sets in 5 minutes. Cures steel hard in 30 minutes. Ready for sanding or painting in 1 hour.

It sticks to fiberglass, wood, metal, and plastic. Can be used underwater. Easy to apply by hand.

Great for boats, pools, and home projects. Durable and strong. Compact and portable.

Pros	Cons
Fast emergency repairs in 1 minute. Works underwater on wet or dry surfaces. Bonds to fiberglass, wood, metal, plastic. Quickly sets and cures steel hard. Easy to use, even for DIY projects.	Not for large repairs due to small 4 OZ size. Requires quick mixing for effective application, no room for delays. Limited color options, stands out on non-white surfaces.

Perfect For:

This STAR BRITE Epoxy Putty Stick is perfect for anyone who needs to make quick, strong repairs on almost anything, especially around boats, pools, or even underwater! It’s a must-have for DIYers and anyone who wants a reliable fix that’s easy to use and built to last.

Ready to Purchase?

View Price on Amazon (paid link)

7. Epoxy Putty – 8oz / 227g Pool Putty, 2 in 1 Underwater or Above Fast Repair, Fix Leaks, Cracks, Filling, Sculpting – 2 Part Epoxy Sculpt Clay for Metal, Tile, Concrete, Plastic, Ceramics (White)

Epoxy Putty - 8oz / 227g Pool Putty, 2 in 1 Underwater or Above Fast Repair, Fix Leaks, Cracks, Filling, Sculpting - 2 Part Epoxy Sculpt Clay for Metal, Tile, Concrete, Plastic, Ceramics (White)

Fix leaks and cracks fast with this 2-in-1 epoxy putty. It works underwater or above, making repairs easy. Use it on metal, tile, plastic, and more.

This putty is strong and durable, resisting water, heat, and impact. It hardens like metal, so you can drill, grind, or paint it. It’s safe to use and non-toxic.

Save time and money with this versatile repair solution. It’s easy to mix and apply, curing fully in 24 hours. Perfect for pools, pipes, crafts, and more.

Pros	Cons
Fixes leaks, cracks, and holes fast, above or underwater. Durable repair resists heat, water, and impact for long-lasting results. Easy to use, sets in 30 minutes, fully cures in 24 hours. Safe, non-toxic, and works on metal, plastic, ceramic, and more.	30-minute setting time may feel too short for complex repairs. 24-hour full cure requires patience for permanent results. White color may not match all surfaces without painting.

Perfect For:

This epoxy putty is perfect for anyone who needs a quick, strong fix for leaks, cracks, or holes. It’s great for pools, tubs, pipes, and more, working underwater or above. Easy to use and lasts a long time.

Ready to Purchase?

View Price on Amazon (paid link)

8. Epoxy Putty, 12oz/340g White Epoxy Sculpt Clay Fix Leaks, Cracks, Filling, Multi-Purpose Putty Stick Filler for Bonding Metal, Wood, Tile, Ceramics, Pool Plumbers Puttys Mega Adhesion & Waterproof

Epoxy Putty, 12oz/340g White Epoxy Sculpt Clay Fix Leaks, Cracks, Filling, Multi-Purpose Putty Stick Filler for Bonding Metal, Wood, Tile, Ceramics, Pool Plumbers Puttys Mega Adhesion & Waterproof

Epoxy Putty is a strong, white sculpt clay that fixes leaks and cracks fast. It cures on its own at room temperature without heating. After it hardens, it stays tough, waterproof, and heat resistant.

This putty works on many surfaces like metal, wood, tile, and ceramics. You can shape it for art or repairs, then sand, paint, or drill it when dry. It bonds tightly and is great for pipes, pools, and home fixes.

Mix it in equal parts. Apply to the broken spot. Wait 24 hours. It’s easy and quick to use. Need help? Just ask us.

Pros	Cons
Self-curing putty hardens at room temperature, no heat needed. Strong adhesion bonds to metal, wood, tile, and more. Waterproof and durable, ideal for leaks and repairs. Easy to use, sets in 30 minutes, fully cures in 24 hours.	Takes 24 hours for full hardening after application May be too hard to remove from the container initially Requires mixing in exact 1:1 ratio for best results

Perfect For:

This epoxy putty is perfect for DIY lovers, crafters, and home repair enthusiasts. It’s great for fixing leaks, cracks, and bonding materials like metal, wood, and ceramics. Whether you’re sculpting, repairing, or creating, this multi-purpose putty is easy to use and waterproof.

Ready to Purchase?

View Price on Amazon (paid link)

9. J-B Weld 6 Minute Set Epoxy KwikWeld, High Strength, Waterproof, 2 Pack, Dark Grey, 50176-2

J-B Weld KwikWeld is a fast-setting epoxy that fixes almost anything. It’s strong, waterproof, and easy to use for DIY projects at home, in cars, or on boats.

Mix it, apply it, and it sets in 6 minutes. Works on metal, plastic, wood, and more. Perfect for quick, lasting repairs.

Pros	Cons
Fast setting: Ready to use in just 6 minutes. Strong bond: Holds tight with 3127 PSI strength. Waterproof and durable for long-lasting repairs. Works on many surfaces like metal, wood, and plastic. Easy to mix with a handy syringe and tray.	6-minute set time may be too fast for complex repairs. Dark grey color might not match all surfaces or projects. 4-6 hour cure time requires patience for full strength.

Perfect For:

J-B Weld KwikWeld is perfect for anyone who needs a fast, strong fix for DIY projects. Whether you’re fixing metal, plastic, wood, or more, this easy-to-use epoxy gets the job done quickly and reliably.

Ready to Purchase?

View Price on Amazon (paid link)

10. Loctite Epoxy Multi Purpose Repair Putty , 2 oz Stick, 1 Pack

Loctite Epoxy Multi Purpose Repair Putty is a handy fix-it tool for small emergencies. It bonds to damp surfaces and even works underwater. Perfect for quick, reliable repairs.

This two-part system combines resin and hardener putty for a strong, waterproof bond. It sets fast and can be sanded, drilled, or painted after just 60 minutes. Great for fixing leaks or rebuilding items.

The putty is moldable and won’t shrink or crack. It sticks to many materials like metal, wood, glass, and more. A versatile solution for all your repair needs.

Pros	Cons
Fixes anything, anywhere, even underwater. Bonds to damp surfaces in 60 minutes. Waterproof, tough, and paintable after curing. No shrinking, no cracking, high impact strength.	Not for large repairs, only small fixes. 60-minute wait before sanding or drilling. Must mix by hand, no quick application.

Perfect For:

Loctite Epoxy Multi Purpose Repair Putty is perfect for anyone who needs a quick, strong fix for small repairs. Whether you’re fixing leaks, sealing pipes, or repairing items, this handy putty works on many materials and cures fast.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Looking for the best waterproof epoxy putty? You want something strong, fast, and easy to use. These putties fix leaks and cracks underwater or above with lasting results.

Buying the right epoxy putty can make your repair smooth and stress-free. Here’s what to look for:

Waterproof Ability: Make sure the putty works underwater or on wet surfaces. This is key for plumbing, boats, or pools.
Cure Time: Fast-setting putties save time. Some cure in minutes, others take hours. Choose based on how quickly you need the repair done.
Surface Compatibility: Check if it bonds well with metal, plastic, wood, or other materials you need to fix.
Strength and Durability: Look for a putty that forms a tough, lasting bond. It should resist heat, chemicals, and impact.
Ease of Use: A putty that mixes easily by hand and molds well makes repairs simpler and cleaner.
Heat Resistance: If your repair faces heat, pick a putty that withstands high temperatures without breaking down.
Finish Options: Some putties can be sanded, drilled, or painted after curing. This helps with a neat, professional look.
Safety: For plumbing or potable water repairs, choose a putty that is certified safe and non-toxic.
Size and Quantity: Consider how much putty you need. Small sticks are good for quick fixes; larger amounts suit bigger jobs.
Color: Some putties cure in off-white, gray, or dark gray. Pick a color that blends well with your repair surface.

With these factors in mind, you’ll find a waterproof epoxy putty that fits your project perfectly. Happy fixing!