11 Best Roof Sealant 2021

Roofs are made of tough materials, but that does not mean that they are indestructible. With time, the roofing material on your roof will start wearing out.

However, you can slow down this process using a roof sealant. Most of these compounds are made of elastomeric compounds, which can expand and contract as the roof substrate moves.

As such, the roof sealant won’t crack or peel even when the temperature is extremely high. In addition to this, roof sealants protect roof substrates from UV radiation, thus prolonging durability.

Also, roof-sealing compounds will make your roof virtually impenetrable to moisture, air, water, and other elements.

With the help of the roof sealants highlighted below, you will be able to protect your roof from damage.

11 Best Roof Sealant

1. Liquid Rubber Color Waterproof Sealant

Liquid Rubber Color Waterproof Sealant

The water-based roof sealant by Liquid Rubber is one of the highly raved roof-sealing formulas on the market, and it is for a good reason.

This product is available in multiple colors, so you can go for the option that suits your needs and preference.

The ingredients used in formulating this compound are of good quality, thus making it reliable. As such, you can use it in your next roof restoration or maintenance project without worrying about durability.

By using this sealant, your roof will achieve a watertight coating that will keep moisture at bay.

As a result, the roofing material will stay in good condition for several years, thus lowering your repair costs.

In addition to this, the sealant will insulate your roof against heat loss so your home will always be warm and cozy. This roof sealant can be used both indoors and outdoors, hence making it even more convenient.

Plus, it can adhere to a wide range of materials, meaning that you can apply it to just about any roofing material.

The sealant is highly flexible once it has fully cured, so it will hold up even when there is movement on the roof.

To make it even better, this formula can adhere to vertical and flat surfaces. However, you will have to apply the compound to the correct thickness when sealing vertical areas.

And since the manufacturer has included the instructions, you won’t have a hard time applying the sealant.

The other thing that you will like about this roof sealant is that it contains no solvents, so it won’t corrode your roofing material.

Pros
  • UV stable
  • Environmentally friendly
  • Non-flammable
Cons
  • Takes time to cure

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2. Jetcoat Reflective Acrylic Roof Coating Sealant

Jetcoat Reflective Acrylic Roof Coating Sealant

If you are looking for a reflective roof sealant, this formula may just end your search. This product has all the features that a good roof sealant should have, so you can apply it on your roof having full assurance that it will last.

The coating that is applied will protect your roof for 5-10 years depending on the formulation that you use. As stated earlier, this sealant can reflect the sun’s rays, thereby keeping your roof and your home cool during hot summers.

Consequently, this will lower the amount of energy that is used when running the cooling system, thus cutting down your utility costs.

This formula is easy to apply, making it a suitable option for DIY enthusiasts. Besides, you can apply it on your roof using a roller sprayer.

Both methods will provide you with quality results, so you can use the equipment that is readily available.

Additionally, the formula can work on different roofing materials, so it won’t matter whether your roof is made of asphalt, metal, or EDPM rubber, this product will adhere to it.

When applying a subsequent layer, ensure that you give the first layer six to eight hours so that it can cure properly.

You can as well apply this compound to the roof of your RV to conserve energy. The acrylic compounds used in fortifying this roof sealant make it even more durable, thus saving users from resealing their roofs every now and then.

Also, the rubber-like membrane that is formed after the compound has cured will shield your roof from the elements.

Pros
  • Offers excellent coverage
  • Easy application
  • High quality
Cons
  • You have to apply multiple coats to get maximum results

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3. Sashco Clear Roof Sealant

Sashco Clear Roof Sealant

The roof sealant from Sashco can stick to different roofing materials without giving you any problem.

Moreover, the formula is made up of strong co-polymers that will keep your roof in top class condition for the longest time possible.

When using this compound, you won’t have to worry about your roof leaking because it will ensure that every gap on the roof is sealed.

Besides, it can even be used when repairing roofs that are leaking. The most unique thing about this formula is that it cannot be easily affected by changes in temperature.

As such, it won’t melt during the hot summers, and neither will it freeze in winter. Furthermore, the cured sealant can contract and expand as the temperature varies.

And because the elements will have minimal effect on the roofing material, your roof will last for an extended period without you making any repairs.

That is not all, you can apply this product to your roof in different weather conditions without it peeling off.

It can as well be applied to wet surfaces, thus making it versatile. To get good results, however, you should consider applying the sealant when the roofing material is dry.

You should also remove surface debris to maximize adhesion. Plus, the formula is UV stable, so it won’t lose its elasticity even when exposed to the sun for long hours.

The fact that it comes in a clear shade makes it dependable because you can apply it to roofing materials with different colors without the colors clashing.

This sealant will blend effortlessly with the surface on which it is applied, so it won’t lower the aesthetic appearance of your roof.

Pros
  • Delivers high performance
  • All-weather formula
  • Seals fast
Cons
  • The application process can be a bit messy if you use the wrong applicator

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4. Rubberseal Liquid Rubber Coating

Rubberseal Liquid Rubber Coating

Thanks to its insulating properties, this roof sealant will dramatically lower energy consumption in your home.

It will not only protect your roofing material from solar radiation but will also prolong the overall durability of the roof.

In addition to this, it will prevent heat from penetrating through the roof, so your house will stay cool even when the external temperatures are high.

Aside from that, it also decreases moisture absorption, meaning that the roofing material won’t rot or degrade in quality.

This sealant maintains its elasticity and flexibility even after it has cured, so the seal that is created won’t break under extreme weather.

Also, it can effectively adapt to roof substrate movement. The sealant comes in different colors, thus allowing users to choose the shade that matches their needs.

You can find the sealant in matte black, dark gray, white, light gray, and clear. All the available color options have high solar reflectance, so you can go for the one that pleases you the most.

To add to its list of benefits, the sealant has high emissivity, so it will be able to release the heat that has been absorbed through thermal radiation.

As a result, this will reduce the ambient air temperature in your home, making all rooms in the house conducive.

Pros
  • Waterproof
  • Versatile
  • Low VOC
Cons
  • Requires a lot of time to dry

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5. Flex Seal Liquid Rubber

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This sealant will provide you with a flexible rubber coating that will prolong the lifespan of your roof.

Additionally, it will protect the roofing material from corrosion, so you won’t have to make replacements from time to time.

The formula comes in liquid form and cures to form a tough barrier that will seal out moisture, air, and water. This product is resistant to both mold and mildew, so your roofing material will stay clean for a long time.

Like the roof sealant that we have just reviewed, this formula is available in a variety of colors, thus making it convenient for all users.

To add to this, the cans come in three different sizes, so you can make your purchase depending on the size of the area that you want to cover.

Once applied, the formula will seep into the spaces and cracks on your roof, thereby preventing the warm air that is inside the house from escaping. This will allow your air conditioner to operate optimally without being pushed to overdrive.

There are so many ways through which you can apply this sealant to your roof. You can use a roller, brush, or spray.

In addition to being UV-resistant, the formula is non-flammable and is also safe for plants and pets.

To top it all up, the product is chemical resistant, so the roofing fixtures won’t be affected by acid rain.

Pros
  • Spreads smoothly
  • Non-toxic
  • Easy to apply
Cons
  • Does not stick to wet surfaces

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6. HENRY HE587372 Roof Coating

HENRY HE587372 Roof Coating

Henry’s elastomeric formula is also another roof sealant that you can consider using if you are looking to upgrade your roofing material.

The formulation is made up of premium grade fillers and resins that will provide you with outstanding results when sealing roofs.

It also contains titanium dioxide pigments, which add to its durability. More to this, the sealant will form a highly reflective surface that will protect the roofing fixture underneath from UV radiation.

At the same time, the cured seal will allow moisture to vent out of the roofing material, thus making the roof even more durable.

However, water cannot infiltrate the cured seal, so there will no pooling on the roof. This product is also very effective when it comes to heat loss, meaning that it will lower the temperature of your roof, thus preventing the substrates from expanding excessively.

More on this, the compound can contract and expand freely without cracking.

Moreover, the sealant comes in a large pail that will enable you to treat a large area. This formula can also work on shingles and gutters.

Pros
  • Superior longevity
  • High solar reflectance
  • Does not require a primer
Cons
  • The curing time can be affected by weather

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7. KST Kool Seal Roof Restoration Coating

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If you are looking for a roof sealant that you can use on metal and tile roofs, then this is the product for you.

Once the formula has cured, it won’t peel or crack regardless of the weather condition. Thanks to its powerful ingredients, this sealant will not only restore your roofing material but will also protect the entire roof from the elements.

As such, you won’t have to worry about rust when working with metal roofs. Additionally, it creates a layer that will reflect heat and UV rays, thus preventing possible damage to the roof.

Consequently, this will make your house cooler and will also lower your cooling. You can use this formula to cover the whole roof or when repairing a small area that may be leaking.

This formula goes on smoothly, so it won’t chalk provided that you apply it correctly.

Since the product has rubber-like properties, the seal that is created will stretch or contract when required.

This unique feature allows the seal to withstand the pulling forces that may come about as a result of substrate movement.

Pros
  • Creates a leak-free seal
  • Renews roofing materials
  • Offers long-lasting protection
Cons
  • Somewhat thin, so you may have to apply multiple layers

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8. Liquid Rubber Solar Reflective Sealant

Liquid Rubber Solar Reflective Sealant

Liquid Rubber provides you with yet another powerful formulation that you can apply to your roof.

This sealant is specially formulated to ensure that users get commendable results when coating metal roofs. In fact, you can even apply it to the roof of your mobile home, RV, camper, etc.

The formula clings well to surfaces, so it won’t peel with time. To create a waterproof membrane, ensure that you apply heavy coats to reduce permeability.

Each layer should be given adequate time to cure since this will allow the subsequent coat to adhere strongly to the surface.

Furthermore, the product cures to a solar reflective barrier that will extend the life span of your roof.

This product is nature-friendly, so it won’t cause any harm to your pets. Also, the formula comes ready-to-use, so you won’t have to add anything to it.

You will be happy to know that you can easily apply this sealant the same way you would apply regular paint. If you like, you can even use a conventional sprayer.

The elastomeric acrylic compounds in this formula give it high tensile strength, so the seal won’t detach from the surface of the roof even when the temperature drops to sub-zero levels. It also delivers excellent performance when the weather is hot, thus making it reliable.

Pros
  • Indoor/outdoor use
  • No solvents
  • Highly flexible
Cons
  • It may take longer to dry when conditions are damp or cold

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9. Geocel 22300 Pro Flex Multi-Purpose Brushable Sealant

Geocel 22300 Pro Flex Multi-Purpose Brushable Sealant

Geocel presents you with a multi-purpose roof sealant that can adhere to most roofing materials.

The formula will form a long-lasting seal that is equally elastic. You can apply this compound on flat roof surfaces, but you can as well use it when sealing roof valleys.

It will create a waterproof seal in both scenarios, making this a suitable option for users who tackle a wide range of roofing projects.

When cured, the seal will prevent rust, stop leaks, and will also shield the roofing fixture from the sun.

The formulation is crystal clear, so it can blend well with all colors. As such, you won’t have to apply a layer of paint to it after it has cured.

This product can stick to wet surfaces, but you should apply it to a moisture-free area to get optimum sealing results.

Aside from roofs, this formula can also seal chimney crowns and skylights. Besides, the seal that is formed will stay flexible in both cold and hot conditions.

For user convenience, the can is fitted with a carrying handle that you can use when moving from one work site to another.

Pros
  • Paintable and brushable
  • Mildew resistant
  • Not toxic once it has fully cured
Cons
  • Not as easy to apply compared to most formulas on the list

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10. Premier Pro Products All-N-1 Elastomeric Reflective Roof Sealant

Premier Pro Products All-N-1 Elastomeric Reflective Roof Sealant

The high-performance roof sealant from Premier Pro Products is a multipurpose formula that you can apply on roofs and other surfaces.

However, the most amazing thing about it is that it can work with a wide range of roof substrates. Its use can apply in all areas where a rubber-based sealant may be needed.

The resultant seal will lower the surface temperature of your roof, thereby reducing the temperature inside the house.

This sealant can also be applied to an existing layer of sealant. Nonetheless, the surface must be clean and dry for the formula to stick.

Apart from that, you have to check if the old coat has adhered well to the roof. This product has excellent adhesion, so it will bond with the surface in question very fast.

If applied the right way, this sealant will protect the roofing material from algae, mold, moisture, just to mention but a few.

The membrane that is created after the compound has dried is both waterproof and breathable.

This means that it will allow the air hot air that is coming from the roof substrate to escape to the surrounding environment.

Pros
  • Single-step application
  • Creates a cool coating
  • Reflects UV radiation
Cons
  • The formula may be too thick for some users

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11. Leak Stopper Liquid Rubber Seal & Waterproof Protection

Leak Stopper Liquid Rubber Seal

You can reinforce the joints on your roof using this high-quality sealant by Leak Stopper. As the brand name suggests, this compound will make your roof leak-proof by sealing all the cracks and crevices.

In addition to this, the formula creates a barrier that is impenetrable to water, air, and moisture. This roof sealant is formulated from synthetic rubber compounds that are of excellent quality, making it super durable.

Additionally, the formulation will bond seamlessly with most roofing materials without cracking or peeling after it has cured.

This sealing compound is not too thick, so it can easily flow into holes and crack, forming a watertight seal that will prevent water from coming into direct contact with the roofing fixture.

The compound can adhere to painted surfaces, so you can apply it to any construction equipment.

Plus, the formula will provide you with a clean finish when coating smooth or rough roof surfaces.

By using this roof sealant, you can rest assured that your roof will last longer compared to when a sealant is not used.

Pros
  • Exceptionally tough
  • Delivers lasting protection
  • Works on indoor and outdoor surfaces
Cons
  • Limited color options

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Frequently Asked Questions

What should I consider when buying a roof sealant?

Since there are so many formulas, you have to be careful when choosing a roof sealant. As such, you should consider if the compound is waterproof, mold-resistant, elastic, and durable.

You should also consider the method of application since this will help you prepare your equipment prior to application.

Can a roof sealant stop my roof from leaking?

Yes. Roof sealants can be used when sealing holes and cracks that may be causing your roof to leak. Nevertheless, ensure that you pick the formula that matches the task description.

Can I seal my gutter using a roof sealant?

Roof sealants are very versatile, so you can use them on gutters, roof valleys, and many more. Some formulas can also seal chimney crowns.

Final Verdict

You can make your roof more durable by using any of the roof sealants that we have highlighted in the detailed review list above.

These sealing compounds are formulated using powerful ingredients that will shield your roof from destructive elements.

To add to this, the roof sealants on our list are very easy to apply. Besides, some of the sealants can be applied using a brush or sprayer.

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