Do you want to know how to apply roofing cement on a roof? If that’s the case, stay tuned thoroughly.

You know roofing cement is used to seal the roof and to hold shingles, tiles, roll asphalt, and other roofing materials in place. It differs from regular cement mixtures. The regular cement mixture is insufficient to prevent roof leaks. That is why roofing cement is required while constructing a roof.

The effectiveness of roofing cement largely depends on its application. And so, first of all, you have to know the application process. 

Let’s have a look at how to apply the roofing cement step by step.   

how to Apply Roofing Cement

How To Apply Roofing Cement?

Hand gloves must be used before touching the roofing cement to avoid skin injury. Then you must clean the area where you intend to repair to get rid of all the dust. Add roof cement to any minor cracks and holes with a trowel to ensure that they are thoroughly filled. If there are any large gaps, you need to follow the other method. Continue reading to learn more about this.

Here, we’ll take you through the whole process of applying roofing cement.

Step 1: Put on a pair of hand gloves before touching roofing cement

You must wear your hand gloves before handling the cement mixture since the mixture will be quite hard when dry. Your smooth skin will be affected by this combination.

Apply Roofing Cement hand gloves
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Hand Gloves Before Touching Roofing Cement
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Step 2: Remove all dust from the affected area

Clean the area where you wish to apply roofing cement of all dirt, debris, and dust. If you neglect this step, the entire process will be for waste. Because cement will not adhere correctly to the region if it is covered with filth and dust.

Step 3: Take a measurement of your roof to figure out how much roofing cement you’ll need

You must measure the particular area of your roof that has to be repaired. Take your measurements in square feet so that you can quickly figure out how many gallons of roofing cement you’ll need to cover your roof.

It is estimated that 1 gallon of roofing cement is required to repair a twelve square foot section of your roof with a thickness of 1/8 inch.

This step may be cost-effective for you. 

Step 4: Use accurate formulas before applying the cement mixture on the roof

The roofing cement mixture can be made in a variety of ways. The right techniques for mixing cement are crucial in this case. You know to get the finest results, summer is the best season for working with the roofing cement. 

Still it is possible to work with these cement if you’re working in the rainy season. Because roofing cement has the ability to stick with the wet surfaces too.

So when you’re working on a rainy day, use the wet-surface formulations of roofing cement so that the cement can properly adhere to the wet surface.

Also make sure the mixture isn’t too thin. To acquire a better outcome, use the formulas appropriately.

Step 5: Fill all the gaps and holes with roofing cement

Before applying the roofing cement coats, make sure you fill all of the minor cracks and holes with roofing cement using a trowel.

When it comes to major cracks and holes, fiberglass or rolled roofing should be used to fill them.

Before applying roofing cement, make sure all gaps are filled. This will help to prevent spills.

Step 6: Apply 1/8 inches thick coating of roofing cement over the sealed area

After you’ve finished filling, use a placing knife to apply the first layer of roofing cement, which should be 1/8 inch thick. Then wait for the cement to dry for 12 hours. Then, if necessary, apply a second layer of roofing cement with the same thickness and let it cure.

Follow that, when the roof blister is patched. First and foremost, open it and leave it to dry. Then, while flashing and sealing, use roofing cement with a thickness of 1/2 inch.


I hope you found this content to be helpful. And you have the proper idea now on how to apply roofing cement on a roof.

It is required to repair and seal any leaks in your damaged roof. Make sure to follow the step-by-step directions to create a great roof for your home. If you skip any stages, you’ll have to repeat the planning event.

Before you begin this endeavor, you should prepare a systematic strategy. As a result, strategy can assist you in avoiding future waste.

Use the steps outlined above to try to restore your damaged roof. Take care when working. Best wishes.


As a civil engineer and roofer, I love to share the experience that I have gained through the last couple of years. In the roofing industry, practical experience is a very crucial fact that can help you a lot. Hence, I want to help you with my blog.

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