Best Hardware Sealers of 2025

Harry Stack Avatar
Harry Stack
Last Updated: Jan 15, 2025

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Hardware sealers are a type of sealant used to protect and preserve various types of hardware, including metal, wood, and concrete. These sealers can be applied to surfaces to prevent rust, corrosion, and other forms of damage caused by exposure to the elements. They are particularly useful for outdoor applications, such as on fences, gates, and garden furniture. Hardware sealers come in a variety of formulations, including acrylic, silicone, and epoxy, and can be applied using brushes, rollers, or sprayers. They are an effective and affordable way to extend the life of your hardware and keep it looking great for years to come.

At a Glance: Our Top Picks

Miracle Sealants 511 Impregnator Sealer Cover#TOP 1
Miracle Sealants 511 Impregnator Sealer
ftb score rating icon9.8
Rectorseal 81880 Duct Seal Compound Cover#TOP 2
Rectorseal 81880 Duct Seal Compound
ftb score rating icon9.7
Gorilla Waterproof Patch & Seal Spray Cover#TOP 3
Gorilla Waterproof Patch & Seal Spray
ftb score rating icon9.5

Top 10 Hardware Sealers

#TOP 1

Miracle Sealants 511 Impregnator Sealer

511QT6
Clear
Quart
Miracle Sealants 511 Impregnator Sealer Cover
511 Impregnator Sealer
ftb score rating icon9.8
FTB Score

The Miracle Sealants 511 Impregnator Sealer is a versatile sealer that can be used both indoors and outdoors on a variety of surfaces. It creates an invisible barrier that protects against water, stains, and slippage. The formula is oil and water resistant, resists weather elements, and is UV transparent. One quart can cover up to 1,000 square feet, making it an efficient option for large areas. Another benefit is that it is easy to apply and won't yellow over time, and it is safe to use around food prep areas.

What We Like
Easy application process
Effective stain resistance
Quick drying time
Long-lasting protection
Improves appearance of surfaces
What We Don't Like
Strong odor during application
Results may diminish over time
#TOP 2

Rectorseal 81880 Duct Seal Compound

81880
Gray
1 Pound (Pack of 1)
Rectorseal 81880 Duct Seal Compound Cover
Rectorseal 81880 1-Pound Duct Seal Compound Gray
ftb score rating icon9.7
FTB Score

The Rectorseal Duct Seal Putty is a versatile and user-friendly solution for sealing various surfaces. This gray, soft compound adheres well to clean, dry materials, making it ideal for hand-molding into different shapes for your specific needs. You can apply it comfortably between 25°F and 120°F, ensuring effective use in various conditions. It creates a robust air and water-tight seal, resisting water and mild chemicals. Additionally, it is asbestos-free and safe for both metals and plastics, giving you peace of mind while working on plumbing, HVAC, or general home repairs.

What We Like
Easy to apply
Effective sealing
Non-hardening material
Versatile for various uses
Cost-effective solution
What We Don't Like
Can be a bit messy
May appear sticky initially
#TOP 3

Gorilla Waterproof Patch & Seal Spray

Clear
Clear
1 - Pack
Gorilla Waterproof Patch & Seal Spray Cover
Gorilla Waterproof Patch & Seal Rubberized Sealant Spray; Crystal Clear; 14oz (Pack of 1)
ftb score rating icon9.5
FTB Score

Gorilla Waterproof Patch & Seal Spray is a flexible, rubberized coating that seals out water, air, and moisture to stop or prevent leaks. Its self-leveling formula smoothly covers small gaps and cracks, ensuring a watertight seal. The spray is temperature and UV resistant, and can be used on various surfaces, including roofs, gutters, skylights, flashing, chimneys, PVC pipe joints, windows, RVs, and more. Additionally, it works with both latex and oil-based paint and can be painted over once dry.

What We Like
Effective moisture and dust barrier
Easy application process
Quick-drying formula
Clear finish, no discoloration
Multiple coats recommended for best results
What We Don't Like
Spray nozzle may be delicate
Doesn't seal larger gaps well
FSMAXBLK24-2PK
Black
Flex Seal MAX Cover
Flex Seal 2-Pack Black 17oz Stop Leaks Instantly, Waterproof Sealant Coating For Gutters, RV, Roof, Skylights, Windows
ftb score rating icon9.3
FTB Score

Flex Seal MAX Spray is the easy way to coat, seal, protect, and stop leaks fast! This waterproof rubber spray on sealant coating seeps into cracks and holes, drying to a watertight, flexible, rubberized coating that lasts for many years. With 20% more in each can, you'll have plenty of product to transform and protect virtually everything. Whether you're working on arts & crafts projects, hobbies, or need to repair gutters, wood, RVs, campers, roofs, skylights, or windows, Flex Seal MAX Spray is the perfect solution. It's not affected by extreme temperatures, so it won't sag or drip in the Summer heat and won't crack or peel in the Winter cold. Once dry, you can even paint over it in any color to match your desired aesthetic.

What We Like
Easy to apply
Effective for leaks
Versatile for various projects
Cost-effective solution
Long-lasting results
What We Don't Like
Tends to overstay on application
Unknown UV durability
#TOP 5

Granite Gold Sealer Spray

GG0036
Clear
24 Fluid Ounces
Granite Gold Sealer Spray Cover
Granite Gold Water-Based Sealer Spray Protection for Granite, Marble, Travertine, Natural Stone Countertops, 24 Fluid Ounces, 1-Pack
ftb score rating icon9.3
FTB Score

Protect your natural stone surfaces with Granite Gold Sealer. This spray creates a barrier that provides maximum protection against oil, water, coffee, wine, and other liquids, as well as etches and soil build-up. Specially formulated for all natural-stone surfaces in the kitchen, bathroom, and other areas of your home, this pH-balanced and food-safe spray is easy to apply and has no strong or harmful odors. Made by a third-generation family of stone care experts in the USA, Granite Gold Sealer is a must-have for maintaining and protecting your stone surfaces. Use it with Granite Gold Daily Cleaner and Polish for long-lasting results.

What We Like
Easy application
Effective sealing
Waterproof protection
Glossy finish
No streaks
What We Don't Like
Somewhat expensive
Time-consuming process
#TOP 6

Flex Seal Liquid Rubber in a Can, 16-oz, Clear

FLEX SEAL - LFSCLRR16
Clear
16-oz
Flex Seal Liquid Rubber in a Can, 16-oz, Clear Cover
Flex Seal Liquid, 16 oz, Clear, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry
ftb score rating icon9.1
FTB Score

Flex Seal Liquid is a versatile liquid rubber that comes in a can. It can be brushed, rolled, dipped, or poured onto any surface to provide a watertight, flexible rubberized coating. This product goes on smoothly and covers quickly, sealing out water, air, and moisture. Its UV-resistant formula prevents rust and corrosion, while also being mildew and chemical resistant. Use Flex Seal Liquid anywhere you need a reliable, long-lasting seal.

What We Like
Easy to apply
Dries quickly
Strong adhesion
Flexible performance
Great customer service
What We Don't Like
May require multiple coats
Can look opaque with layers
#TOP 7

Gorilla Waterproof Patch & Seal Liquid

105341
Clear
1 - Pack
Gorilla Waterproof Patch & Seal Liquid Cover
Gorilla Waterproof Patch & Seal Liquid Rubber Sealant, Crystal Clear, 32oz (Pack of 1)
ftb score rating icon9.1
FTB Score

Gorilla Seal Liquid is a versatile, flexible, and easy-to-apply rubberized coating that seals out water, air, and moisture to stop and prevent leaks. Its self-leveling formula smoothly covers small gaps and cracks ensuring a watertight seal. When dried, it is temperature and UV resistant resulting in lasting repairs. Works with both latex and oil-based paint, making it paintable. Gorilla Seal Liquid can be used on roofs, gutters, skylights, flashing, chimneys*, PVC pipe joints, windows, RVs, DIY projects, and more! Not for continuous submersion or below-waterline use.

What We Like
Clear when dry
Thick consistency
Easy to apply
Excellent adhesion
Effective waterproofing
What We Don't Like
Can be messy to handle
Packaging issues reported
#TOP 8

StoneTech Bulletproof Sealer 1 Quart

D14924225
1 Quart
StoneTech Bulletproof Sealer 1 Quart Cover
STONETECH Bulletproof Sealer, 1 Quart/32 OZ (946ML) Bottle
ftb score rating icon8.9
FTB Score

The StoneTech Bulletproof Sealer is designed to offer powerful protection for your interior porous natural stone and grout. With its unique, high-strength formula, it ensures that your surfaces are safe from stains, giving you peace of mind. This sealer covers up to 100 square feet, making it efficient for larger areas. Made with advanced, water-based fluoropolymers, it not only protects your surfaces but does so while being environmentally friendly. Plus, you can enjoy up to five years of protection on your interior surfaces, allowing you to maintain the beauty of your stone without constant reapplication.

What We Like
Effective sealing performance
Easy application process
No unpleasant odors
Maintains natural stone appearance
Long-lasting protection against stains
What We Don't Like
Requires reapplication every few months
Final cleanup can be tricky
#TOP 9

Flex Seal Spray Rubber Sealant Coating, 14-oz, Gray (2 Pack)

FSGRYR20
Gray
Flex Seal Spray Rubber Sealant Coating, 14-oz, Gray (2 Pack) Cover
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
ftb score rating icon8.9
FTB Score

Flex Seal Spray is a colorful and fast way to coat, seal, and stop leaks. It seeps into cracks and holes, sealing out water for years. The flexible rubberized coating dries to a watertight finish, making it perfect for arts and crafts, projects and hobbies, and sealing outdoor decorative items. With Flex Seal Spray, you can transform and protect virtually everything. This product is ideal for those who want a fast and easy solution to stop leaks and seal cracks. It is also perfect for those who want to protect their outdoor items from water damage and extend their lifespan.

What We Like
Easy to use
No leaks after application
Strong adhesion
Versatile applications
What We Don't Like
Strong fumes
May require multiple coats
#TOP 10

Liquid Rubber Waterproof Sealant

12602
Original Black
1 Gallon
Liquid Rubber Waterproof Sealant Cover
Liquid Rubber Waterproof Sealant - Multi-Surface Leak Repair Indoor and Outdoor Coating, Water-Based, Easy to Apply, Original Black, 1 Gallon
ftb score rating icon8.8
FTB Score

Liquid Rubber Sealant is a highly flexible and durable waterproof sealant that provides a protective finish for a variety of surfaces such as flat roofs, metal roofs, sloped roofs, planter boxes, foundations, sheds, basements, metal, wood, and concrete. Its final membrane has over 1000% elongation, preventing adhesion failure, and is UV stable, protecting the product from sun degradation. With its easy water-based application, it is environmentally friendly, containing no solvents, VOC's, or harmful odors. This sealant is safe for both indoor and outdoor use and can be applied without the need for special breathing apparatus. Additionally, Liquid Rubber Sealant can be used to bridge joints, seams, vents, gaps, and protrusions, ensuring a bulletproof system for any waterproofing needs.

What We Like
Excellent waterproofing solution
No cracking or peeling
Easy to apply
Long-lasting performance
Great customer service
What We Don't Like
Color may differ from description
Long curing time
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What are the 3 types of sealant?

There are several types of sealants are: Silicone based sealants. Urethane based sealants. Acrylic based sealants.

2. What are the two types of sealers?

There are two common types of sealers to choose from – film forming and penetrating, with each offering their own different benefits and each suitable for different applications.

3. How do penetrating sealers work?

Penetrating sealers work by increasing surface tension to cause beading. These products will create hydrophobic water-shedding, meaning water will quickly form into droplets on the sealed concrete paver surface instead of soaking in.

4. Is there a sealer for concrete?

There are two main types of concrete sealers: film-forming sealers and penetrating sealers. Film-forming sealers include acrylics, epoxies, and urethanes that form a coating on the surface of the concrete. Film-forming sealers, especially acrylics, are more susceptible to wear and will need to be reapplied frequently.

Editor's Notes

During our hardware sealer research, we found 24 hardware sealer products and shortlisted 10 quality products. We collected and analyzed 118,559 customer reviews through our big data system to write the hardware sealers list. We found that most customers choose hardware sealers with an average price of $19.41.

The hardware sealers are available for purchase. We have researched hundreds of brands and picked the top brands of hardware sealers, including Miracle Sealants, Rectorseal, Gorilla, Flex Seal, Granite Gold. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

Written by
Harry Stack Avatar

Harry Stack owns a small hardware store, his career landed him a depth of knowledge in categories such as tools, equipment, machinery and hardware. In his spare time, he usually repairs furniture, safes and appliances, and he knows how to make simple repairs to plumbing or electrical fixtures. His hobbies also include woodworking and fishing.

Hardware Sealers Comparison Table

#TOP1
Miracle Sealants 511 Impregnator Sealer Cover
#TOP2
Rectorseal 81880 Duct Seal Compound Cover
#TOP3
Gorilla Waterproof Patch & Seal Spray Cover
#TOP4
Flex Seal MAX Cover
#TOP5
Granite Gold Sealer Spray Cover
#TOP6
Flex Seal Liquid Rubber in a Can, 16-oz, Clear Cover
#TOP7
Gorilla Waterproof Patch & Seal Liquid Cover
#TOP8
StoneTech Bulletproof Sealer 1 Quart Cover
#TOP9
Flex Seal Spray Rubber Sealant Coating, 14-oz, Gray (2 Pack) Cover
#TOP10
Liquid Rubber Waterproof Sealant Cover
BrandMiracle SealantsRectorsealGorillaFlex SealGranite GoldFlex Seal LiquidGorillaStoneTechFlex SealLiquid Rubber
StyleImpregnator Sealer1 lb1 - PackMAX, 2 Pack - Black, 17 oz.SprayProtective1 - Pack1 QuartGray, 14 oz, 2-PackWaterproof Sealant
Item dimensions L x W x H7 x 3 x 4 inches6.5 x 3 x 3 inches2.5 x 2.5 x 9 inches11 x 6 x 3 inches2.5 x 4.63 x 10.88 inches3.38 x 3.38 x 4 inches4.1 x 4.1 x 4.7 inches10.62 x 6.69 x 11.02 inches5.2 x 2.6 x 9 inches12 x 12 x 16 inches
MaterialWaterPuttyRubberRubberLiquidRubberHybrid-RubberPolymer
Item Weight794 Grams-14 Ounces17 Ounces0.49 Kilograms16 Ounces2.4 Pounds32 Ounces28 Ounces9 Pounds
FTB Score
ftb score rating icon9.8
ftb score rating icon9.7
ftb score rating icon9.5
ftb score rating icon9.3
ftb score rating icon9.3
ftb score rating icon9.1
ftb score rating icon9.1
ftb score rating icon8.9
ftb score rating icon8.9
ftb score rating icon8.8
Where to Buy