Types of Roof Cement

Last updated on February 23, 2024

Explore the diverse world of roof cement as we delve into its various types, ensuring you choose the perfect solution for your roofing needs.

When it comes to roofing, there are a lot of different materials and products that go into creating a durable and long-lasting roof. One such product is roof cement, which is used to seal gaps and cracks in the roof, as well as to bond shingles or tiles together.

But with so many different types of roof cement available on the market today, how do you know which one is right for your specific roofing needs? In this article, we’ll take a closer look at some of the most common types of roof cement and their unique properties to help you make an informed decision for your next roofing project. So if you’re ready to learn more about this essential component of any good roofing system, read on!

What Is Roof Cement?

types of roof cement

It’s typically made from a mixture of asphalt, fibers, solvents, and other additives that give it its unique properties. Roof cement can be applied with a trowel or putty knife to fill in small holes or gaps around flashing areas where water may seep through.

One of the most significant benefits of using roof cement is its ability to create an effective barrier against moisture infiltration. This makes it an essential component for any roofing system since even minor leaks can lead to significant damage over time if left unaddressed.

There are several different types of roof cements available on the market today – each with their own unique set of features and benefits. Some are designed specifically for emergency repairs while others offer long-term solutions for more extensive damage.

Roof Cement Uses

One of the most common uses for roof cement is to seal gaps and cracks in the roof, preventing water from seeping into your home and causing damage. This type of repair work can be done quickly and easily with just a few simple tools, making it an ideal solution for emergency leak repairs.

In addition to sealing leaks, roof cement can also be used as part of long-term roofing repairs. For example, if you have loose shingle tabs or tiles on your roof that need to be re-adhered, applying some roofing cement underneath them can help keep them securely in place.

Another use for roof cement is as an adhesive when installing new shingles or tiles on your roof. By applying small amounts of this material between each layer during installation, you’ll create a strong bond that will help prevent wind damage and other types of wear over time.

Emergency Roof Leak Repairs

If you notice water stains on your ceiling or walls, it’s essential to act fast and address the issue before it causes further damage to your home. In such cases, emergency roof leak repairs are necessary.

One of the quickest and easiest ways to fix a leaking roof is by using roofing cement. This versatile material can be used in various applications for temporary fixes until professional help arrives.

To use roofing cement for an emergency repair job, start by locating the source of the leak from inside your home. Once you’ve identified where water is coming in from above, climb onto your roof with a bucket of roofing cement and some application tools like trowels or putty knives.

Next, clean any debris around the area where you’ll apply roofing cement thoroughly; this will ensure that there are no loose particles that could interfere with adhesion between surfaces when applying new materials over them later on down-the-line if needed again soon after initial repairs have been made (which may happen).

Long-Term Roof Repairs

When it comes to repairing leaks or damage that could compromise the integrity of your roof, you’ll want to choose a product that will provide lasting protection against the elements.

One option is silicone-based roof coatings, which are designed specifically for use on flat or low-sloped roofs. These coatings create a seamless barrier over your existing roofing material and can help extend its lifespan by up to 20 years.

Another long-term solution is EPDM rubber roofing membrane, which provides excellent resistance against UV rays and weathering. This type of membrane is typically installed in large sheets and adhered directly onto the surface of your existing roofing material.

Ultimately, choosing the right product for your long-term repair needs will depend on factors such as climate conditions in your area and the specific type of damage you’re dealing with.

Adhering Loose Shingle Tabs

Loose shingles can allow water to seep into your home and cause damage over time. Fortunately, roof cement can be used to adhere loose shingle tabs back in place quickly and easily.

To begin this process, clean the area around the loose tab with a wire brush or scraper. Apply a small amount of roofing cement underneath the tab using a putty knife or trowel.

Press down firmly on the tab for several seconds until it adheres securely in place.

It’s important not to use too much roofing cement during this process, as excess material can create an unsightly bulge under your shingles that may compromise their integrity over time.

Compatible Materials With Roof Cement

This means that the materials you use alongside your roof cement should be able to bond well with each other and create a strong seal. Some of the most common compatible materials with roof cement include asphalt shingles, metal roofing panels, concrete tiles, and wood shakes or shingles.

It’s worth noting that not all types of roofing material are compatible with every type of roof cement. For example, some types of rubber-based cements may not adhere well to certain metals or plastics.

That’s why it’s always a good idea to check the manufacturer recommendations for both your roofing material and your chosen type of roof cement before starting any repairs.

Common Features of the Best Roof Cements

Firstly, the best roof cements are typically made from high-quality materials that offer excellent adhesion and durability. They should also be able to withstand extreme weather conditions such as heavy rain or snow without cracking or deteriorating over time.

Another important feature of good quality roof cement is its ability to expand and contract with changes in temperature without losing its adhesive properties. This is particularly important in areas where temperatures can fluctuate dramatically throughout the year.

Many of the top-rated roof cements on the market today come with added features such as UV resistance and mold inhibitors which help protect against damage caused by exposure to sunlight or moisture.

When selecting a roofing cement product it’s essential to choose one that offers superior performance while being easy-to-use during application.

How Much Roofing Cement Is Needed?

The amount of roofing cement required depends on several factors, including the size and shape of your roof, as well as the type and thickness of materials you are working with.

To determine how much roofing cement you will need for a specific repair or installation job, start by measuring the area that needs to be covered. This can be done by calculating both length and width measurements in feet before multiplying them together to get your total square footage.

Once you know your square footage measurement, consult with product instructions or manufacturer recommendations regarding coverage rates per gallon. Most products provide information about coverage rates based on different application methods such as trowel or brush application.

Best Roof Cement Products

Here are some of the top-rated products that have been tried and tested by professionals in the industry:.

1. Black Jack Premium Roof Cement: This product is known for its excellent adhesion properties and can be used on a variety of surfaces, including metal roofs, concrete roofs, and asphalt shingles.

2. Henry 208 Wet Patch Roof Leak Repair: This wet patch roof cement is perfect for emergency repairs as it can be applied even in damp conditions.

3. Henry 208R SBS Rubber Modified Wet Patch Roof Cement: Another great option from Henry Company that offers superior flexibility thanks to its rubberized formula.

4. APOC 365 Eterna-Flash All Weather SBS Flashing Cement: This all-weather flashing cement provides long-lasting protection against leaks while also being easy to apply with minimal mess or fuss.

5. Gardner Wet-R-Dri All Season Roof Patch:This versatile product works well on both dry and wet surfaces making it ideal for year-round use.

These products offer different features depending on your specific roofing needs but they all provide reliable solutions when you need them most!.

Black Jack Premium Roof Cement

This high-quality roof cement is designed to provide long-lasting protection against leaks, cracks, and other types of damage that can occur on your roof. It’s made from a blend of asphalt and other materials that are specifically formulated to withstand the harsh elements of nature.

One of the key features of Black Jack Premium Roof Cement is its versatility. It can be used for both emergency repairs as well as long-term maintenance projects, making it an ideal solution for any type of roofing system.

This product adheres well to most surfaces including metal roofs, concrete roofs or shingles.

Another great thing about Black Jack Premium Roof Cement is its ease-of-use. The product comes in easy-to-handle containers with clear instructions on how to apply it properly using common tools such as trowels or putty knives.

Henry 208 Wet Patch Roof Leak Repair

This product is made from high-quality materials that are specifically formulated to withstand the harsh elements, including rain, wind, and extreme temperatures. One of the key benefits of Henry 208 Wet Patch Roof Leak Repair is its ease-of-use; it can be applied quickly and easily using a brush or trowel, making it an ideal solution for emergency repairs or quick fixes.

In addition to its easy application process, Henry 208 Wet Patch Roof Leak Repair also offers excellent adhesion properties. It can bond strongly with a variety of different roofing materials including asphalt shingles, metal roofs and concrete tiles.

This makes it an incredibly versatile product that can be used in many different situations.

Henry 208R SBS Rubber Modified Wet Patch Roof Cement

This type of cement is made with a special blend of asphalt, fillers, and SBS rubber polymers that give it superior flexibility and durability compared to other types of roof cement. It can be used on both wet and dry surfaces, making it ideal for emergency leak repairs as well as long-term maintenance.

One unique feature of Henry 208R SBS Rubber Modified Wet Patch Roof Cement is its ability to adhere strongly even in extreme temperatures ranging from -40°F (-40°C) up to 180°F (82°C). This makes it an excellent choice for areas with harsh weather conditions where other types of roofing materials may fail.

Another advantage offered by this product is its compatibility with various roofing materials such as metal, concrete, wood or asphalt shingles. Its black color also blends well with most roofs giving them an aesthetically pleasing look after application.

When applying Henry 208R SBS Rubber Modified Wet Patch Roof Cement ensure you follow the manufacturer’s instructions carefully regarding surface preparation before application since this will affect the adhesion strength between the patching material and your existing roof surface.

APOC 365 Eterna-Flash All Weather SBS Flashing Cement

This product features a unique blend of SBS rubber and asphalt, which allows it to remain flexible even in extreme temperatures, making it an ideal choice for use on roofs that are exposed to frequent temperature fluctuations.

One of the key benefits of APOC 365 Eterna-Flash All Weather SBS Flashing Cement is its ability to adhere strongly to a wide range of roofing materials, including metal, wood, concrete, and more. This makes it an incredibly versatile product that can be used for everything from emergency roof leak repairs to long-term roof maintenance projects.

In addition to its exceptional adhesive properties and weather resistance capabilities, APOC 365 Eterna-Flash All Weather SBS Flashing Cement also boasts excellent workability characteristics. It spreads easily over surfaces without dripping or sagging excessively while still maintaining enough body so as not run off vertical surfaces.

Gardner Wet-R-Dri All Season Roof Patch

This roof cement is designed to provide long-lasting protection against leaks, cracks, and other types of damage that can occur on your roof. It’s made with a unique blend of asphalt, fibers, and adhesion-promoting polymers that work together to create a strong bond between the patch and your roofing material.

One of the standout features of Gardner Wet-R-Dri All Season Roof Patch is its versatility. As the name suggests, this product can be used in any season or weather condition – even when it’s raining or snowing outside! This makes it an ideal solution for emergency repairs when you need to fix a leaky roof quickly.

Another benefit of using Gardner Wet-R-Dri All Season Roof Patch is its ease-of-use. The product comes ready-to-use straight out of the container – no mixing required! Simply apply it directly onto your damaged area using either a trowel or putty knife.

Application Tools for Roof Cement

Some of the most common application tools for roof cement include trowels, putty knives, and caulking guns. Trowels are ideal for spreading larger amounts of cement over a wider area, while putty knives are better suited for more precise applications in tight spaces or around corners.

Caulking guns can also be used to apply roof cement quickly and efficiently. These devices allow you to dispense a steady stream of roofing sealant with minimal effort and mess.

No matter which tool you choose, it’s important to follow proper safety precautions when working with roofing materials. Always wear gloves and eye protection when handling roof cement or other chemicals associated with roofing repairs.

ASTM Standards for Roof Cement

This is where ASTM standards come into play. The American Society for Testing and Materials (ASTM) has established a set of standards that define the physical and chemical properties required for different types of roof cements.

These standards ensure that manufacturers produce high-quality products that meet specific performance requirements, such as adhesion strength, flexibility, weather resistance, and durability. By adhering to these ASTM standards when selecting a roof cement product or hiring a contractor who uses them in their workmanship guarantees you get value from your investment.

Roofing Cement Drying Time

The amount of time it takes for the cement to dry can vary depending on a number of different factors, including temperature, humidity levels, and the type of roofing material being used.

In general, most types of roof cement will take anywhere from 24-48 hours to fully dry and cure. However, this can be affected by environmental conditions such as high humidity or low temperatures which may prolong drying times.

It’s important not to rush through any roofing project that involves using roof cement because if it isn’t allowed enough time to properly dry before exposure to rain or other weather elements; it could lead you back up onto your rooftop in no-time flat!.

Removing Roofing Cement

The first step in removing roofing cement is to soften it up with heat. You can use a propane torch or heat gun for this purpose, being careful not to overheat the surrounding materials and cause further damage.

Once the roofing cement has been softened, you can begin scraping it away using a putty knife or scraper tool. Be sure to work carefully and methodically so as not to damage any underlying layers of your roof.

If there are still stubborn bits of roofing cement left behind after scraping, you may need to resort to chemical solvents such as mineral spirits or acetone. These should be used sparingly and only in well-ventilated areas while wearing protective gear like gloves and goggles.


Is roof tar and roof cement the same?

Answer: No, roof tar and roof cement are not the same, as coal tar roof cement is a specific type of roofing tar formulated to seal, bond or repair damaged or deteriorating roof areas.

Does roof cement stop leaks?

Answer: Yes, roof cement is highly effective at sealing and preventing future leaks.

Does roofing cement get hard?

Yes, roofing cement gets hard as it dries, becoming incredibly durable.

How thick can you put on roof cement?

Roof cement can be applied in a 1/8" to 1/4" thick layer, but for larger damages over 1/4" wide or 2" long, reinforcement with polyester or open mesh glass fabric is necessary.

What is the difference between asphalt-based and acrylic-based roof cement?

Asphalt-based roof cement is made from bitumen, a petroleum byproduct, while acrylic-based roof cement is a water-based, flexible sealant made from acrylic polymer.

How do weather conditions affect the effectiveness of roof cement?

Roof cement’s effectiveness is compromised by adverse weather conditions, such as extreme temperatures, heavy rainfall, and high winds.

Can you apply roof cement on top of an existing layer or does it need to be removed first?

It is possible to apply roof cement on top of an existing layer without removing it first.