Master the Application of GRP Roofing Topcoat

Your Guide to Applying GRP Roofing Topcoat

Discover the essential steps for applying GRP roofing topcoat effectively. Ensure a durable and weather-resistant finish for your flat roof with our expert guidance.

Key Features of Our Roofing Topcoat



Superior Adhesion

Our topcoat ensures a strong bond with the surface, reducing the risk of peeling and extending the lifespan of your roof.



Weather Resistance

Engineered to withstand harsh weather conditions, our topcoat protects your roof from rain, UV rays, and temperature fluctuations.



Easy Application

Designed for ease of use, our topcoat can be applied smoothly with minimal tools, making it perfect for DIY enthusiasts and professionals alike.

Understanding the Application Process



Step 1

Prepare the Surface

Begin by ensuring your roof is clean and dry, removing any debris or loose materials for optimal adhesion.



Step 2

Mix the Topcoat

Thoroughly stir the topcoat, ensuring the catalyst is well integrated for a consistent application.



Step 3

Apply the Topcoat

Use a roller to evenly distribute the topcoat across the roof, focusing on achieving a smooth, uniform finish.

Top coating the roof Apply Topcoat at a ratio of 0.5-0.6kg per m2, this ensures the correct thickness and will prevent cracking under fluctuating temperatures

Quickly understand how to apply roofing topcoat to a flat roof. The Topcoat is a resin and should be treated in the same way as the base resin. It requires the addition of a catalyst for it to cure. Always try to apply the topcoat immediately after the laminate is semi-cured (can be walked on, no stickiness) If this is not possible then ensure the top coating is carried out within 24 hours to gain good bonding with the laminate.

If the top coating is left longer than 24 hours then wash down the laminate with acetone to gain a good cross-polymerisation of the topcoat to the laminate. Remove the lid and stir the topcoat well before use. Ensure the styrene and wax at the bottom of the tin is fully mixed in. Pour out into the mixing buckets enough topcoat to cover the perimeter of the roof (including the edge trims.) Use a 2½ Polyester roller to coat the trims.

A roller will get a better and more even finish than a paintbrush.

Cleaning Tools and Equipment

Buckets can be re-used for many jobs. When each mix is finished, coat the inside of the bucket. When the resin has cured after approximately 30 minutes it can be peeled out, leaving the bucket like new and ready for the next job. Paintbrushes can be dropped into a re-sealable container of acetone and left for the next job. Use only paintbrushes that have unpainted or uncoated handles, as the coatings will come off and contaminate the resin. Polyester rollers have sleeves that are removable. It is too time-consuming to clean the roller sleeves. Unscrew the nut with pliers and drop the used sleeve into the bucket of used resin. Either use disposable latex gloves when handling catalysts or resins or clean hands with hand cleaner. Do not clean your hands with acetone. wipes are also a useful addition to your toolkit. As well as cleaning hands they are good for removing resin from windows and fascias.

Roofing Performance Metrics

Our roofing solutions have consistently demonstrated exceptional durability and weather resistance, ensuring long-lasting protection for your home.

Durability Index

Weather Resistance Score

Customer Satisfaction Rate

Installation Efficiency Rating

Common Questions About Roofing Topcoat

Applying a roofing topcoat can be a straightforward process, but it’s important to address common concerns to ensure a successful application. Here are some frequently asked questions to help guide you through the process.

What is the best weather condition to apply a roofing topcoat?

For optimal results, apply the topcoat on a dry day with temperatures between 10°C and 25°C. Avoid application during rain or extreme heat.

How long does the roofing topcoat take to dry?

The topcoat typically dries to the touch within 2-4 hours, but full curing can take up to 24 hours depending on weather conditions.

Can I apply a topcoat over an existing roof?

Yes, you can apply a topcoat over an existing roof, provided the surface is clean, dry, and free of any loose materials or debris.

How often should I reapply the roofing topcoat?

Reapplication is generally recommended every 5-7 years, depending on environmental exposure and wear.

What tools do I need for applying the roofing topcoat?

You’ll need a roller or brush, a mixing paddle, and protective gear such as gloves and goggles for safe application.

Is it necessary to use a primer before applying the topcoat?

Using a primer is advisable for surfaces that are porous or have never been coated before, as it ensures better adhesion of the topcoat.

Protect Your Roof with Our Premium Topcoat

Enhance the durability and longevity of your roof with our top-quality roofing topcoat. Perfect for ensuring a weather-resistant and robust finish, our products are designed to withstand the harshest conditions. Don’t wait—secure your roof’s future today with Composite Roof Supplies.