Waterproofing Chemicals for Roofs: Top 5 Myths Busted!

When it comes to protecting your home, your roof is your first line of defense—but are you relying on myths that could compromise its safety?

At Sunanda Global, we care about your home’s well-being as much as you do. Misconceptions about waterproofing chemicals can lead to costly mistakes and even jeopardize the structural integrity of your roof. To help you make informed decisions, we’re uncovering five common myths about waterproof chemicals for roofs that every homeowner should know.

Read on to discover the facts that can safeguard your home for years to come.

Top 5 Myths About Waterproofing Chemicals for Roofs

Myth 1: Waterproofing Chemicals Are Only for Leaky Roofs

Waterproofing chemicals aren’t just a remedy for leaky roofs but a preventative measure. Their primary purpose is to shield roofs from water damage before leaks occur. By acting as a defence, they ensure your roof remains intact despite harsh weather conditions. Think of it as insurance for your home’s longevity. 

Moreover, addressing waterproofing needs before leaks can save costs for repairs, mould remediation, and structural damage. It is much more economical to prevent leaks than to fix the damage caused by them. 

Myth 2: All Waterproofing Chemicals Work for All Roofs

Each waterproofing chemical is designed with specific applications in mind. Here’s a quick guide to understanding which chemicals work best for different roof types:

1. Polyurethane

Best For: Flat roofs, concrete roofs, and roofs with small cracks.

Why? Highly elastic and immune to weather changes, polyurethane is a UV resistant coating that ensures seamless application without joints or weak points.

Not Ideal For: Roofs with constant standing water, as additional measures are needed.

2. Liquid Rubber

Best For: Green roofs, flat roofs, and sloped roofs.

Why? Eco-friendly, flexible, and non-toxic, it creates a durable waterproof barrier.

Not Ideal For: Roofs with sharp surfaces that can puncture the membrane.

3. Acrylic Coatings

Best For: Flat roofs, metal roofs, and low-slope roofs in areas with moderate climates.

Why?: Lightweight, cost-effective, and highly reflective, reducing roof surface temperature and enhancing energy efficiency.

Not Ideal For: High-humidity areas or roofs prone to standing water.

4. Cementitious Waterproofing

Best For: Concrete roofs, terraces, and moderate weather conditions.

Why? Affordable and easy to apply, it provides a hard, protective barrier.

Not Ideal For: Extreme temperature fluctuations, as it may crack over time.

5. Epoxy Resins

Best For: Damaged roofs, concrete roofs, and crack repairs.

Why? Its strong bonding properties make epoxy waterproofing ideal for localized sealing and durability.

Not Ideal For: Large-scale waterproofing projects due to their limited coverage.

Myth 3: Thicker Application Means Better Protection

This is a common misconception. While it might seem logical that a thicker layer of waterproof roof coating would provide more protection, the opposite can be true. Over-application can lead to uneven curing and cracking. 

Most waterproofing chemicals are designed to work optimally within specific thickness guidelines set by manufacturers. For example, polyurethane membranes work best at a uniform thickness of 1.5–2 mm. Exceeding this can compromise elasticity and adhesion. Precision in application, rather than excess, ensures better results.

Myth 4: All Waterproofing Chemicals Are Expensive

Waterproofing solutions come in a range of options to fit different budgets. While high-end materials like silicone coatings are pricier, cost-effective alternatives like cementitious waterproofing are available. For instance, cementitious waterproofing is not only affordable but also easy to apply, making it a popular choice for residential projects. 

And like stated before, investing in waterproofing chemicals can save you significant repair costs down the line by preventing structural damage and leaks.

Myth 5: Waterproofing Chemicals Make Roofs Completely Leak-Proof

No waterproof chemicals for roofs can guarantee 100% leak-proof performance under all conditions. Factors like improper application, substrate damage, and extreme weather can still cause water ingress. Waterproofing chemicals do reduce the risk, but maintenance is key to long-term effectiveness. 

Sunanda’s Best Waterproofing Chemicals for Roofs

SUNKOTE WP+

Features:

• Suitable for both flat and sloping roofs
• Highly elastic and accommodates thermal movements
• UV resistant
• Anti-fungal 
• Non-toxic formula

User guidelines:

• Clean the surface thoroughly.
• Repair damaged areas with polymer-modified mortar.
• Apply a primer like POLYALK WP or SUNPRIME WP and let it cure.
• Apply two coats of SUNKOTE WP+ with a 24-hour gap.
• Apply the second coat perpendicular to the first.
• Cure for 24-48 hours, then add a protective screed layer with proper slope.

POLYALK WP

Features:

• Ideal for water tanks, flat/sloping roof slabs, domes, and vaulted roofs.
• Easily mixes with cement for smooth application.
• Effective in moist or damp conditions, even during monsoons.

User Guidelines:

• Scrub and clean the surface; moisten with water 24 hours before application.
• Mix POLYALK WP with cement and apply with a brush.
• Apply 2-3 coats at 24-hour intervals.
• Let the coating set for 24-48 hours and cure for 2-3 days.
• Add a protective screed or plaster for durability.

Why Choose Sunanda for All Your Roof Waterproofing Solutions?

At Sunanda, we understand the importance of using the right waterproofing chemicals in the right way to ensure your home remains safe and durable for years to come. As the best waterproofing company, we take pride in offering a wide range of solutions, from advanced epoxy paints to curing compounds, tailored to meet the unique needs of every project.

Whether you’re looking to safeguard your terrace, water tank, or waterproof chemicals for roofs, our solutions are designed to deliver exceptional results. Why leave your roof vulnerable when you can trust the expertise of the waterproofing contractors in Delhi, Noida, Bengaluru, Mumbai, and beyond?

Contact Sunanda today and let us provide your roof with the ultimate protection it deserves!