The 10 Best Damp Proof Paints to Protect Your Home in the UK 2025

A damp proof paint sounds simple enough, but most people only start looking for it when a wall turns cold, patchy, or starts showing those faint little tide marks you hope will disappear on their own. They don’t. And once you notice them, they pull your eyes back every time you walk past. 

The awkward bit is that not every damp proof paint product actually helps. Some are great for moisture coming from the air. Others work better on walls that stay chilly and attract condensation. A few can hold back persistent problem spots that keep reappearing even after you’ve painted over them twice already.

That’s why this list matters. It trims the noise, highlights the paints that genuinely hold up in real homes, and explains where each one shines. 

Whether your bathroom ceiling won’t stay dry, your bedroom wall gets that cold patch every winter, or you’re dealing with an older house that likes to test your patience, there’s a product here that can help.

Let’s look at the best damp proof paints worth your time in the UK this year—and what makes each one a practical choice.

Amazon Affiliate Disclaimer: Some links in this guide are Amazon affiliate links. If you buy through them, I may earn a small commission at no extra cost to you. It helps keep these guides free and updated, and only genuinely useful products make the cut.

You may also want to read our other guide: What is rising damp?

Top 10 Best Damp Proof Paints in The UK  

1. Polar White Damp Seal Paint – 500ml

If you are serious about stopping interior damp, this Polar Damp Seal Paint is a strong contender. Its Pliolite formulation makes it the ultimate damp and stain eliminator. This means it doesn’t just cover up; it seals out moisture and stubborn marks with just two coats. Think of it as putting a resilient barrier on the wall.

This is a crucial step for preventing mould and mildew in bathrooms or any high-condensation spot. A fantastic time-saver is its quick-drying feature: it becomes touch dry in a speedy 2-3 hours. You can get the job done efficiently and quickly move on to the next step.

Key Features

• Pliolite-formulated paint seals out dampness and stains with two coats.
• Quick-drying, becoming touch dry in just 2-3 hours.
• All-in-one formula combining primer, sealer, and finish.
• Provides ongoing prevention against mould and mildew.
• Offers up to 8m²coverage per litre for cost-effectiveness.

Pros

• Multi-functional product simplifies the painting process, saving time.
• Excellent for high-condensation areas and resistant to various common stains.
• Creates a resilient barrier on many surfaces (plaster, cement, stone, wood).
• Reduces wall downtime during renovation or repair projects.

Cons

• Highly flammable liquid and vapour, requiring careful use in well-ventilated areas.
• Contains components that may cause serious eye damage or respiratory irritation.

Why we recommend Polar White Damp Seal Paint

This paint is an all-in-one, quick-drying solution that creates a resilient, long-lasting barrier for permanent mould and damp proofing.

Explore prices on Amazon: Polar White Damp Seal Paint – 500ml

2. SIRAMICO COATINGS The Dampseal One Coat | 1 Litre

If you need a faster fix than applying two coats, this SIRAMICO DAMPSEAL paint might be what you are looking for. It promises to be a true one-coat wonder, meaning it eliminates damp and mould stains in a single application. This dramatically speeds up the process of refreshing a room.

The paint is highly efficient, offering versatile coverage of up to 20 m² with just one litre, which is a big plus for quick fixes or smaller, affected areas. And since it has a fast-drying formula, you can complete your project swiftly, cutting down on renovation time. This paint works hard on a wide range of stains too, tackling not just damp and mould, but also grease and nicotine marks.

Key Features

• Eliminates damp and mould stains in a single application.
• Covers up to 20 m² with just one litre, providing versatile coverage.
• The fast-drying formula enables swift project completion.
• Tackles a broad spectrum of stains, including damp, mould, grease, and nicotine.
• Easy application using either a brush or roller on walls and ceilings.

Pros

• Single coat application saves significant time and effort.
• Highly efficient coverage per litre makes it cost-effective for repairs.
• Dries rapidly, minimizing disruption to your home
• Versatile for use on multiple interior surfaces affected by various stains.

Cons

• Customers report a very foul smell when applying.
• Application can be runny, potentially making cleanup tricky.

Why we recommend SIRAMICO COATINGS The Dampseal One Coat

This paint is a fast-acting, high-coverage option that seals stubborn damp and mould stains in just one time-saving application.

Explore prices on Amazon: SIRAMICO COATINGS The Dampseal One Coat | 1 Litre

3. JENOLITE Stain Blocker Paint | WHITE | 400ml

If you need a quick, instant solution for ugly wall stains, especially mould and mildew marks, check this out. This JENOLITE Stain Blocker is a spray paint, which makes application super easy! It’s formulated to be a powerful anti-mould paint that immediately covers up those blemishes on your walls and ceilings.

You can use this pure white spray as a primer before your final coat, or you can just leave it as the topcoat for a quick fix. It acts like a tough, damp seal, creating a strong barrier against persistent problems like water marks, nicotine, grease, rust, and even crayon. It’s ideal for those high-humidity spots like bathrooms and laundry rooms where mould loves to hang out.

Key Features

• It’s an instant solution that immediately covers marks left by mildew and mould using a spray format.
• Functions as both a stain block primer and a final topcoat, giving you great flexibility.
• Creates a strong barrier against common stains like water marks, grease, soot, and nicotine.
• The anti-mould paint penetrates deeply, covering and helping prevent stain recurrence.
• It’s a multi-surface spray usable on interior walls, ceilings, plaster, cement, and woodwork.

Pros

• Ease of Use: Being a spray paint makes application incredibly simple and fast.
• Immediate Cover: Customers noted it often works effectively in just about 30 seconds.
• Durability: The premium formula is designed to be mould-resistant and long-lasting.
• Quick Cure: Fully cures in only 60 minutes, minimizing downtime significantly.

Cons

• Coverage: Feedback is mixed, with some finding the coverage inadequate for their needs.
• Strong Odour: Customers frequently mention that the product has a very pungent, unpleasant smell.

Why we recommend JENOLITE Stain Blocker Paint | 400ml

This is the fastest, easiest way to immediately block and seal persistent stains and mould marks on high-humidity surfaces.

Explore prices on Amazon: JENOLITE Stain Blocker Paint | 400ml

4. HQC Anti Damp – 1 Litre

If your damp problem comes from heavy condensation, like in a busy kitchen or bathroom, this HQC paint is specifically formulated for you. It goes beyond just sealing by creating a breathable, obliterating membrane. This means it actively stops the reappearance of damp, but the unique micro-porous feature allows trapped moisture to evaporate.

This process prevents common issues like paint flaking and wallpaper peeling. It is designed to eliminate the condensation problem that leads to odour and fungi. Plus, you can start decorating right away since it comes in a decorative Sage Green matte finish.

Key Features

• High-performance solution creates a breathable, obliterating membrane.
• Designed to eliminate condensation problems that lead to odour and fungi.
• Micro-porous formulation allows trapped moisture to evaporate.
• Suitable for applying to both dry and damp interior walls and ceilings.
• Available in Sage Green matt finish, along with other colours.

Pros

• Breathability prevents paint flaking or wallpaper peeling due to trapped moisture.
• Permanently stops the reappearance of water and other household stains.
• Suitable for high-traffic, tough places like gyms, spas, and restrooms.
• Effectively freshens walls while resisting fungi and mould.

Cons

• No specific touch-dry time is listed, requiring patience.
• Described as “Spray, Watercolour,” which may confuse brush application users.

Why we recommend HQC Anti Damp – 1 Litre

This paint is highly effective because its breathable, micro-porous formulation controls condensation, preventing moisture buildup and paint damage.

Explore prices on Amazon: HQC Anti Damp – 1 Litre

5. Ronseal Quick Dry Damp Seal Aerosol White 400ml

Forget messy brushes and long waiting times; this Ronseal product is all about speed and simplicity. It comes in an aerosol format, which is perfect for spot treating and gives you easier access to hard-to-reach places like ceiling lines or pipework areas. Its main job is to permanently block damp stains and fully protect your decorative topcoat from being ruined.

The biggest benefit, by far, is the drying time: this formula only needs 10 minutes to dry. That is an incredibly fast turnaround time for a damp seal. You can apply this paint directly to damp surfaces, which is fantastic because it means you don’t have to wait for the wall to completely dry before tackling the stain.

Key Features

• Permanently blocks damp stains, preventing damage to topcoat paint.
• Aerosol application makes it easy to access hard-to-reach places.
• Quick-dry formula needs only 10 minutes to dry.
• It can be applied directly to damp surfaces without waiting.
• Comes in a 400ml can, ideal for localized spot repairs.

Pros

• Super-fast drying time significantly minimizes project duration.
• Highly effective at sealing stubborn water and damp marks.
• Application is straightforward for beginners and quick for pros.
• Seals the surface even if it is slightly damp upon application.

Cons

• Extremely flammable aerosol, requiring very careful handling.
• Vapours may cause drowsiness or dizziness in poorly ventilated areas.

Why we recommend Ronseal Quick Dry Damp Seal Aerosol

This is the fastest-drying option we’ve seen, offering permanent damp stain blocking and easy aerosol application for those tight spots.

Explore prices on Amazon: Ronseal Quick Dry Damp Seal Aerosol White 400 ml

6. Drybase Liquid Damp Proof Paint (1 Litre, White)

This Drybase product is not just a paint; it is a high-strength liquid damp-proof membrane (DPM). This means it creates a robust, flexible barrier highly effective against major issues like moisture ingress and ground gases in both internal walls and floors. Unlike some cosmetic seals, this is a serious structural solution.

The formula is designed for user comfort, offering low odor because it is water-based and Bitumen-Free. Application is quick: it’s a two-coat process, but the initial coat has a fast 1-hour drying time. This DPM is versatile, providing a strong, flexible coating suitable for everything from floor/wall junctions to protecting embedded timber joists.

Key Features

• High-strength liquid DPM barrier is effective against moisture ingress and ground gases.
• Low Odour formulation thanks to being water-based and Bitumen-Free.
• Two-coat application process with a fast 1-hour initial drying time.
• Cures to form a flexible and elastic membrane that resists moisture.
• Versatile product suitable for a large range of substrates, including brick and timber.

Pros

• Provides structural damp proofing for floors and low-level walls.
• High-quality formulation ensures excellent adhesion and drip-resistance.
• Quick initial drying time allows for project acceleration.
• Protects against ground gases, which is key for sub-floor applications.

Cons

• Coverage is relatively low (approx. 1 m² per litre), indicating a thick application.
• Contains sensitizing substances that may produce allergic skin reactions.

Why we recommend Drybase Liquid Damp Proof Paint

This high-strength liquid paint is essential for structural applications, creating a robust, low-odor barrier against ground moisture and gases in floors and walls.

Explore prices on Amazon: Drybase Liquid Damp Proof Paint (1 Litre, White)

7. Johnstone’s Paint to Cover Damp White, 750ml

If you need a reliable barrier that prepares your wall for any decorative finish, this Johnstone’s product is a solid choice. It is a high-opacity paint specifically formulated to safeguard against damp seeping through your final paint layer. You can use it on plaster, brickwork, cement, and stone.

After application, it can be immediately over-coated with your choice of emulsion product. Just note that you must plan for its longer dry time; it typically needs about 14–16 hours to touch dry. In exchange for the wait, you get a hard-wearing gloss finish that completely seals the surface.

Key Features

• High opacity formulation designed to safeguard against damp seeping through.
• Can be over-coated with your choice of standard emulsion product.
• Creates a hard, durable gloss finish upon drying.
• Suitable for internal surfaces including plaster, brickwork, cement, and stone.
• Provides coverage of approximately 3 square meters per litre.

Pros

• Excellent opacity ensures damp stains are completely blocked before final decoration.
• Versatile for use on multiple common internal substrates.
• Easy to use for DIY homeowners tackling damp patches.
• The hard gloss finish provides an extra level of protection.

Cons

• Requires a long drying time of 14-16 hours, slowing the project.
• Highly flammable liquid and vapour, requiring good ventilation.

Why we recommend Johnstone’s Paint to Cover Damp

This high-opacity paint creates a durable gloss barrier that safeguards your final decorative topcoat from damp seepage and stains.

Explore prices on Amazon: Johnstone’s Paint to Cover Damp White, 750ml

8. Hemway Stain Blocker & Damp Proof Paint, Satin White 1L

This Hemway product acts as a specialized damp proof paint and undercoat all in one. It is specially engineered to create a protective seal, meaning it is highly effective at tackling persistent damp and staining issues common in bathrooms, kitchens, and bedrooms.

This paint helps prevent moisture intrusion and discoloration, acting as a powerful line of defense against future water damage. It is designed for DIY ease, offering a smooth, quick-dry application that cuts down on project time.

And that’s not all! It has an added benefit in that the formula is vegan and cruelty-free, offering an ethical choice without compromising on the performance needed to seal problem areas.

Key Features

• Dual function: acts as a powerful stain blocker paint and a white primer.
• Specially engineered to seal and cover persistent stains on interior walls and ceilings.
• Fast drying and easy to apply with minimal prep, designed for DIY ease.
• Provides a smooth, durable satin finish with excellent opacity.
• 100% vegan and cruelty-free formula.

Pros

• Multi-purpose product reduces the need for separate primer and seal coats.
• Helps prevent moisture intrusion and discoloration in problem areas.
• High opacity conceals marks effortlessly, brightening tired spaces.
• Ethical formulation is a strong differentiator for conscious consumers.

Cons

• Provides a satin finish, which may be too shiny for those wanting a flat matt look.
• The specific coverage area is not listed, making efficiency hard to judge.

Why we recommend Hemway Stain Blocker Paint & Primer

This dual-action, fast-drying paint is an ethically sound choice that provides a satin finish while sealing and covering damp stains effectively.

Explore prices on Amazon: Hemway Stain Blocker Paint & Primer, Satin White 1L

9. Rempro 5kg White Damp Proof Paint – Internal & External

This Rempro product is a highly advanced SBR (styrene-butadiene rubber) liquid-applied membrane paint. This is not just for small patches; it is designed to be a primary waterproofing barrier, used by professionals in new builds and extensions.

Its biggest benefit is its versatility: you can use this paint on walls and floors, internally and externally, perfect for basement or cellar applications. It seals damp concrete slabs and screeds, isolating them for new floor finishes like carpets. It is also quick-drying, typically in 1 hour, and is certified non-toxic, non-hazardous, and solvent-free, which is great for user safety

Key Features

• Highly advanced SBR liquid-applied membrane paint.
• Suitable for internal and external walls, floors, and basements.
• Quick-drying, typically dry to the touch in 1 hour.
• Non-toxic, non-hazardous, solvent, and plasticiser-free.
• Provides a vapour barrier with a required minimum dry film thickness of 0.6mm.

Pros

• Professional-grade primary waterproofing barrier for high-risk areas.
• Can be applied to damp concrete floor slabs and screeds.
• High flexibility and toughness with good crack bridging properties.
• Quick application due to fast re-coat time.

Cons

• Requires a precise coverage rate ($1.20/kg/m²) to achieve the vapour barrier.
• Should not be applied in wet weather or where frost is a risk before drying.

Why we recommend Rempro 5kg White Damp Proof Paint

This SBR liquid membrane provides a professional-grade, fast-drying, non-toxic waterproofing barrier suitable for internal and external structural damp proofing.

Explore prices on Amazon: Rempro 5kg White Damp Proof Paint

10. Landlords Anti Damp, Anti Mould and Condensation – Sky Blue Matt Finish – 1 Litre

If you want speed combined with colour, this landlord’s paint is a strong contender. It uses an advanced formula incorporating a water-reacting agent to seal damp patches and instantly block stains. While most paints require two coats, this paint promises to protect against penetrating damp and spoil décor in just one singular coat, which is a huge time-saver.

It’s a premium quality, low odour anti mould coating guaranteed to protect against unsightly black mould. Plus, it’s a high-opacity paint that comes in a decorative Sky Blue Matt Finish, perfect for use on walls and ceilings in high-moisture areas like bathrooms and kitchens.

Key Features

• Advanced formula incorporates a water-reacting agent to block stains instantly.
• High opacity paint seals damp and prevents penetrating damp in just one coat.
• Low odour, premium quality coating guaranteed to protect against black mould.
• Suitable for use on interior walls and ceilings, including plaster, cement, and stone.
• Provides good coverage of up to 8 square meters per litre.

Pros

• Combines sealing, stain blocking, and decorative finish in one step.
• Low odour formulation and quick action minimize disruption.
• Excellent for multi-purpose use in high-moisture rooms (kitchens, bathrooms).
• Offered in a variety of decorative colours for immediate aesthetic results.

Cons

• The claim of only one coat for full sealing requires careful application.
• Labelled as “Spray” paint type, which may be confusing for a large tin application.

Why we recommend Landlords Anti Damp, Anti Mould and Condensation

This highly opaque, low-odour paint provides immediate stain blocking and anti-mould protection in a convenient single-coat, decorative finish.

Explore prices on Amazon: Landlords Anti Damp, Anti Mould and Condensation – Sky Blue Matt Finish – 1 Litre

Quick Buying Guide: Choosing Damp Proof Paint in the UK

So, you’ve seen the top 10 products. Now, how do you choose the right tin? It all comes down to diagnosing your damp problem correctly. 

Buying the wrong type of damp proof paint is the #1 reason people fail. Always observe the following when choosing: 

Identify the Type of Damp Problem

First, determine the type of dampness you’re dealing with. Is it penetrating damp, condensation, or rising damp? You must fix the root cause before relying on damp proof paint. Anti-damp paint helps protect and seal, but it cannot cure serious water ingress or structural issues.

Choose the Right Paint Formula

For waterproofing, look for liquid-applied membranes that form a barrier. For walls that mainly need stain protection, consider stain-blocking damp seal primers. Water-based paints are ideal for indoor use because they have lower odour and are safer in living spaces.

Check Dry Time and Coverage

Faster drying paints (1–2 hours) let you redecorate sooner. Check the coverage per litre so you know how much paint you’ll need. Some damp-proof paints cover only a few square meters per litre, so proper planning is important.

Look for Moisture Resistance Features

A wipeable finish is very useful for areas exposed to moisture, like bathrooms or kitchens. If damp is ongoing, choose paints that allow vapour to escape or are made for moderate moisture exposure.

Consider Application Ease

Some damp-proof coatings need two coats or careful thickness to work effectively. Make sure the paint can be applied with a brush, roller, or spray, depending on the size and location of the affected area.

Think About Longevity and Safety

Choose paints that are non-toxic and non-hazardous for indoor use. Look for reliable brands with positive reviews to ensure the paint lasts and provides effective protection.

Plan for Total Cost

Include the cost of surface preparation, fixing the underlying damp, and any labour needed. Cheaper paints may seem attractive, but they can fail if the damp isn’t properly treated first.

Test a Small Area First

Always test the paint on a small area before covering the entire wall or ceiling. This helps check adhesion, finish, and coverage.

Common Mistakes to Avoid

• Painting over active leaks without repair
• Using damp-proof paint as a structural fix
• Applying too thin a coat — some paints only work at the right thickness

Summary 

Your Damp Problem Is…	What You Need	Recommended Products
Simple Stains/Small Water Marks	A Stain Sealer or Quick Fix. These are primers that lock the stain onto the wall so it can’t bleed through your topcoat.	Polycell One Coat, Dryzone, Polar White, JENOLITE Spray.
High Humidity & Surface Mould	An Anti-Mould/Moisture-Resistant emulsion. These paints have biocides to kill and prevent fungal growth on the surface.	Zinsser Perma White, Ronseal Anti-Mould Paint, Johnstone’s Bathroom Paint.
Rising Damp or Leaky Basement	A Liquid DPM (Damp Proof Membrane) or Tanking Slurry. These form a heavy, structural, waterproof barrier against water pressure.	Rempro Damp Proof Paint, Zinsser Watertite, Drybase LADM.
Rough Walls/Masonry Under Plaster	An Oil-Based Sealer. These adhere strongly to porous surfaces like brick and cement and provide extreme opacity.	Johnstone’s Paint to Cover Damp.

Our other article you may find useful: What does rising damp look like?

Conclusion: Your Damp-Free Home Starts Now

Finding the right damp proof paint felt complicated, but it doesn’t have to be. We’ve seen that the “best” paint depends entirely on your specific problem. Remember the most important step: fix the leak first!

Here is a quick final recap of our top recommendations, depending on what you’re trying to achieve:

• For the Quick Stain Cover: Grab the Polycell One Coat Damp Seal. It’s the fastest way to lock down a simple watermark.
• For Fighting Mould & Steam: Go with the Zinsser Perma White or Johnstone’s Bathroom Paint. These specialized coatings actively resist moisture and fungal growth in humid areas.
• For Structural Protection: If you have real water pressure or basement damp, bypass the sealers. Use a heavy-duty membrane like Rempro Damp Proof Paint or Drybase LADM to create a proper vapour barrier.

Stop letting damp ruin your home. You now have the knowledge and the product list to tackle the problem permanently. Choose the right tool for the job, apply it correctly, and enjoy your clean, dry walls!

Your Damp Proof Paint FAQs Answered

You’ve got questions about using these products—we’ve got answers! Here are the most common things people ask before tackling a damp job.

1. What is the use of damp proof paint?

Damp proof paint creates a barrier between a damp surface and your decorative finish, such as normal emulsion paint or wallpaper. Its main purposes are:

• Stop Stains: Blocks discoloured watermarks, nicotine, and mould stains from bleeding through your new topcoat.
• Resist Moisture: Prevents moisture vapour or liquid water from reaching the surface, avoiding future damage like bubbling paint or mould growth.

2. Does damp proof paint really work?

Yes, but only when the right type is used for the right job.

• Works brilliantly as a stain blocker and anti-mould surface coating. Products like Polycell and Zinsser Perma White are excellent examples.
• It will not fix major structural leaks, such as burst pipes or missing roof tiles. Paint cannot replace repairing the underlying problem. If you try to seal a large volume of water with a regular stain block, the pressure will eventually push the paint off the wall.

3. How many coats of damp proof paint are required?

This depends on the product and the severity of the damp:

• Stain Sealers (e.g., Polycell): Often claim to be “One Coat” for minor stains. Two coats are recommended for long-term performance.
• Anti-Mould Paints (e.g., Ronseal, Zinsser Perma White): Usually require two full coats to ensure even distribution of biocide and effective mould protection.
• Liquid DPMs (e.g., Rempro, Drybase): Almost always require two thick coats applied at right angles to form the necessary waterproofing membrane.

4. How much does 1 litre of damp proof paint cover?

Coverage varies depending on the formula and the surface:

• High Coverage (Anti-Mould): Products like Johnstone’s Bathroom Paint or Zinsser Perma White can cover 10–12 m² per litre.
• Low Coverage (Heavy DPMs/Seal): Thick barrier coatings like Rempro or Drybase may cover 1–5 m² per litre, as the paint must be applied thickly to form an effective barrier.

5. Can damp proof paint be applied over existing paint?

Generally, yes, if the existing paint is sound.

• If the existing paint is flaking, peeling, or bubbling due to dampness, scrape it off first.
• Damp proof paint needs good adhesion, so always apply it to a clean, smooth, and well-adhered surface. Sand off loose material before painting.

6. What surfaces can damp proof paint be applied to?

Most products are suitable for typical internal surfaces in UK homes:

• Plaster
• Brickwork
• Cement/Concrete
• Stone
• Some heavy-duty products, like Drybase, are also safe for timber or as a coating beneath floor screeds. Always check the tin if using a specialist product on unusual surfaces like wood or metal.

Always check the back of the tin, especially if you are using a specialist product on an unusual surface like wood or metal.