10 Best Woodworm Treatment Sprays to Buy in 2025

If you’ve noticed frass, little holes in your clothes or rugs, or even some tiny shell-like casings around your furniture, chances are woodworm has moved in. These pesky little things can quietly munch away at your floors, your favourite furniture, and even the beams keeping your home standing before you even notice. That’s why you should get the best woodworm treatment as soon as you spot the telltale signs

Unfortunately, getting woodworm out of your home can feel a bit overwhelming with the “Where do I even start?” question lingering. Don’t stress. We’ve done the legwork for you, checking out a bunch of woodworm treatment sprays to see which ones actually work, which you can rely on, and which give the best value.

In this guide, we’ll walk you through the top 10 sprays for 2025, so you can protect your home without second-guessing yourself.

Quick heads-up: Some links in this guide are affiliate links. That just means if you buy through them, we may earn a small commission at no extra cost to you. It helps keep the site running and allows us to keep sharing practical, expert home care advice.

Related article you must read: How to Apply Woodworm Treatment: Your Friendly Guide

10 Best Woodworm Treatment Sprays

Here are our hand-picked woodworm treatment sprays that can remove any infestation. Some also work as wood rot treatment, helping you hit two birds with one stone. Let’s compare and help you find what works best for you.

1. Sika Sikagard Woodworm Killer – 5 Litre

Best for: Interior timber surfaces that need fast, effective woodworm protection.

Sikagard is a fast-drying, high-performance treatment designed to kill woodworm and prevent re-infestation. Its micro-fine active technology allows the insecticide to penetrate deeply into the wood, reaching hidden crevices and joints for thorough protection.

Thanks to its low-solvent, low-odour, and non-flammable properties, it’s safer and more comfortable to use indoors, even on furniture, floorboards, window frames, and doorframes. Plus, once dry, you can stain, varnish, polish, or overpaint the treated surfaces, giving you flexibility for finishing or decorating.

Key Features

• Fast-drying – reduces downtime for DIY projects
• Micro-fine active technology – penetrates deep to kill woodworm and prevent re-infestation
• Low-solvent, low-odour, non-flammable – safe and comfortable for indoor use
• Adaptable – ideal for furniture, floorboards, joists, and interior timber
• Overpaintable – can be finished with stain, varnish, polish, or paint after treatment

Pros

1. Fast-drying – quick and convenient for multiple surfaces
2. Deep penetration – treats hidden woodworm infestations effectively
3. Low-odour and non-flammable – safer and more pleasant indoors
4. Can be finished with paint or stain – flexible for DIY projects

Cons

1. The large 5L size may be cumbersome for small jobs
2. Slightly more expensive than smaller sprays, though coverage is generous

Why We Recommend Sika Sikagard Woodworm Killer

If you need fast, effective treatment for interior timber, this product is ideal. It kills active woodworm, prevents future infestations, and dries quickly, so you can continue work without waiting. The ability to overpaint or finish treated wood makes it especially handy for furniture or visible surfaces where appearance matters.

Check prices on Amazon: Sika Sikagard Woodworm Killer – 5 Litre

2. Soluguard Woodworm and Rot Treatment (2x5L Clear & Sprayer) Ready for Use & Pump Action Pressure Sprayer.

Best for: Large timber areas that need serious protection from both woodworm and rot.

If you’re dealing with extensive timber surfaces, this max-strength treatment is a smart choice. Not only does it tackle active woodworm infestations, but it also helps prevent future ones, giving you peace of mind that your floors, beams, and other wooden structures remain strong over time. On top of that, it protects against dry and wet rot, reducing the risk of costly timber damage.

Moreover, the 5-litre packs come with a pump-action sprayer, which makes it quick and easy to cover large surfaces efficiently. Its deep penetration reaches joints, end grains, and corners, so every part of your timber is thoroughly treated.

Key Features

• Max-strength formula – kills active woodworm and prevents recurrence
• Rot prevention – shields timber from dry and wet rot
• 5L pack with pump-action sprayer – covers 15–20m² efficiently
• Brush or spray application – flexible for large areas or tricky corners
• Deep penetration – reaches joints, end grains, and hidden crevices

Pros

1. Dual protection for woodworm and rot
2. Large coverage – ideal for beams, floors, and multiple surfaces
3. Deep penetration ensures even hidden areas are treated
4. Pump-action sprayer makes application faster and easier

Cons

1. Overkill for small spot treatments
2. Higher upfront cost, although long-term protection can save money

Why We Recommend Soluguard Woodworm & Rot Treatment

In short, this treatment is perfect if you want long-term peace of mind for your timber. Because it protects against both woodworm and rot, and because the large packs and sprayer make application straightforward, it’s well-suited for serious DIY jobs or whole-room applications. Plus, the deep penetration ensures even corners and joints are protected, leaving no part of your timber vulnerable.

Check prices on Amazon: Soluguard Woodworm and Rot Treatment (2x5L Clear & Sprayer) Ready for Use & Pump Action Pressure Sprayer.

3. Cuprinol CUPWW1L 1 Litre Low Odour Woodworm Killer

Best for: Larger DIY woodworm treatment projects requiring long-lasting protection without strong chemical odours.

Cuprinol is particularly handy for handling tricky areas, such as end grains, corners, joints, and crevices. For severe infestations, you can also inject into flight holes, giving you control over every part of the wood. Being water-based, the formula is odourless and quick to apply, making it more convenient than traditional solvent-heavy treatments.

Nevertheless, the manufacturer warns that Carprinol woodworm killer can darken some timbers, so it is advisable to test a small patch first if you are concerned about aesthetics. That said, the coverage is up to 5m² per litre, so it’s a good choice for beams, furniture, floorboards, or even garden wood.

Key Features

• Covers up to 5m² per litre – ideal for bigger surfaces
• Flood surfaces with 2–3 brush coats or inject into flight holes for severe infestations
• Works on bare or polished wood (polished/waxed surfaces may require re-waxing)
• Can darken timber – always test a small patch first
• Low odour, water-based – more pleasant to apply indoors

Pros

1. Large coverage makes it practical for multiple areas or bigger timber projects
2. Flexible application options – brush coats or injection for serious infestations
3. Works on both bare and polished wood
4. Helps restore older timber while protecting it

Cons

1. Can darken timbers – careful testing needed for sensitive woods
2. Longer drying time in corners, joints, or under floors

Why We Recommend Cuprinol Woodworm Killer

This is a great choice if you need to treat larger or multiple pieces of timber. Its coverage, flexible application, and long-lasting protection make it practical for DIY projects, while the low odour makes it more comfortable to use indoors. Just remember to test for colour changes and allow full drying time, especially in hidden areas.

Check prices on Amazon: Cuprinol CUPWW1L 1 Litre Low Odour Woodworm Killer

4. SAFEGUARD Soluguard Woodworm Treatment – 500ml, Clear

Best for: Dealing with small woodworm problems in furniture, beams, or floorboards.

The SAFEGUARD Soluguard Woodworm Treatment is strong enough to stop woodworm in its tracks but still easy to use at home. It contains 0.2% Permethrin, which is about twice as strong as many competing products, and it promises to tackle every stage of the insect’s life cycle.

Best of all, it’s solvent-free, so you won’t have to deal with any heavy chemical smell. That means your home will remain comfortable even after use, which may be unlikely with some other cookie-cutter products. Yes, some may argue the 500ml bottle doesn’t go far, but in our experience, it’s perfect if you only need to treat a few woodworm-affected areas.

Key Features

• 0.2% Permethrin – double the strength of many alternatives
• Works on eggs, larvae, and adult beetles
• Solvent-free – no lingering odour
• Apply with a brush for control or a spray for speed
• Covers around 1.65m² – suited to smaller jobs

Pros

1. Stronger concentration than most sprays
2. Deals with the full woodworm lifecycle
3. No solvent smell left behind
4. Simple to apply, even for beginners

Cons

1. Small bottle – not enough for bigger infestations
2. Higher cost per litre compared with bulk packs

Why We Recommend SAFEGUARD Soluguard Woodworm Treatment

It’s a solid option if you’ve spotted woodworm in one or a few places and want to sort it out quickly. The strength, odour-free formula, and easy application make it very practical for small jobs indoors. For larger areas, though, you’d be better off with a bigger container.

Check prices on Amazon: SAFEGUARD Soluguard Woodworm Treatment

5. Ready Steady Defend Woodworm Killer Spray – 1 Litre

Best for: Indoor timber and furniture that need long-lasting woodworm protection.

If your wooden furniture, floorboards, or beams are under threat from wood-boring beetles or termites, this spray is a handy solution. It targets every stage of the woodworm’s life, so you’re not just dealing with what you see.

Interestingly, the application is straightforward: you can use a brush or low-pressure spray, and it seeps deep into joints and corners to really protect your wood. And guess what? Once applied, it can last up to five years, so you need fewer repeat treatments and get more peace of mind. Plus, it’s safe to use indoors, so you can treat your furniture without worrying about harsh chemicals or strong smells.

Key Features

• Protects against wood-boring beetles and termites – keeps timber solid and safe
• Kills all life stages – full eradication of woodworm infestations
• Easy application – brush or low-pressure spray covers joints and tricky spots
• Safe for indoor use – gentle on furniture and household timbers
• Long-lasting – single treatment protects for up to five years

Pros

1. Works on all stages of woodworm – no hidden infestations left behind
2. Lasts for years – saves time and effort on reapplications
3. Simple to use – perfect for DIY homeowners
4. Safe indoors – won’t leave strong chemical smells

Cons

1. 1 L size might not cover very large areas
2. Slightly higher cost per litre compared to smaller sprays

Why We Recommend Ready Steady Defend Woodworm Killer Spray

This spray is a reliable choice for anyone wanting long-term protection for their timber indoors. It’s easy to apply, goes deep into the wood, and tackles every stage of the woodworm, so you can relax knowing your furniture and beams are safe for years. For smaller DIY jobs or ongoing home maintenance, it’s a real lifesaver.

Check prices on Amazon: Ready Steady Defend Woodworm Killer Spray – 1 Litre

6. Everbuild Lumberjack Woodworm Killer – 5 Litre

Best for: Large timber areas where thorough protection and a polished finish matter.

When you’re tackling woodworm, you want something that works fast, gets deep into the wood, and lets you finish your timber without long delays. Everbuild Lumberjack does exactly that. Its micro-fine active formula sinks into every joint, corner, and hidden grain, tackling any woodworm already there and stopping new infestations in their tracks.

Once it’s dry, you can move straight on to staining, varnishing, or painting, so your beams, joists, floorboards, or large furniture pieces stay both protected and looking great. It’s the kind of product that keeps your project moving smoothly without compromising results.

Key Features

• Strong insecticide – wipes out and prevents wood-boring insects
• Deep penetration – reaches hidden joints, corners, and end grains
• Overpaintable – ready for stain, varnish, polish, or paint once dry
• Fast-drying – usually ready within an hour, so you don’t lose time
• Versatile – ideal for beams, furniture, floorboards, joists, and rafters

Pros

1. Penetrates deeply – protects even the hard-to-reach areas
2. Quick-drying – lets you apply a second coat or finish right away
3. Large coverage – perfect for bigger jobs
4. Flexible finishing – works well with paint, stain, or varnish

Cons

1. 5L can be more than needed for small projects
2. Two coats give the best protection

Why We Recommend Everbuild Lumberjack Woodworm Killer

Everbuild Lumberjack is perfect for bigger indoor timber projects. It gets right into the wood, works quickly, and lets you finish your surfaces exactly how you want. You get solid woodworm protection without slowing down your work, making it ideal for DIYers and homeowners who want long-lasting results.

Check prices on Amazon: Everbuild Lumberjack Woodworm Killer – 5 Litre

Our other guide to read: DIY Woodworm Treatment: Natural and Chemical Solutions That Actually Work

7. Rustins Woodworm Killer – 500ml

Best for: Homeowners looking for trusted, long-term protection for indoor timber.

Rustins isn’t just another woodworm spray — it comes from a company with roots in London’s Shoreditch going back to 1924. With nearly a century of experience in wood treatments, Rustins has built a reputation for quality and reliability.

Their Woodworm Killer penetrates deeply to eradicate infestations and prevent reinfestation, while letting you recoat surfaces as you work for precise coverage. Plus, it’s backed by Amazon’s standard 30-day return policy, so you get peace of mind alongside trusted protection. Ideal for furniture, floorboards, and beams, it’s a small bottle with a big legacy.

Key Features

• Legacy brand – Rustins has been a trusted wood finishing specialist since 1924
• Deep penetration – reaches hidden joints and corners to stop woodworm effectively
• Re-coat while wet – ensures complete coverage in tricky spots
• Low odour – safe for indoor use and comfortable to apply
• Long-lasting protection – fewer repeat treatments needed

Pros

1. Heritage and reliability – from a top UK wood treatment company
2. Works deep into timber – protects hidden areas
3. Low odour – easy to use indoors
4. Compact size – convenient for small or medium projects

Cons

1. 500ml may not cover large surfaces
2. Not designed for extensive timber areas requiring multiple coats

Why We Recommend Rustins Woodworm Killer, 500 ml

If you want a trusted, well-established brand with decades of wood treatment expertise, Rustins is a safe bet. Its deep-penetrating formula eradicates and protects timber, while the ability to recoat and low odour make it practical for indoor use. This isn’t just a spray — it’s the reliability of a company that’s been shaping woodcare for nearly a century.

Check prices on Amazon: Rustins Woodworm Killer – 500ml

8. Rentokil Woodworm Killer Solution – 1L

Best for: Treating small to medium indoor timber areas like floorboards, beams, and furniture.

If you’ve got woodworm showing up, Rentokil’s Woodworm Killer is a safe bet. It’s simple to use — just brush it onto the bare wood or inject it into the tiny holes, and it seeps right into the timber to wipe out the larvae. The nice part is it doesn’t stink the place out, and it dries pretty quickly, so you can treat floorboards, beams, or furniture without much hassle. Once it’s done, you’ve got lasting protection in place.

Key Features

• Targets larvae and adult beetles – tackles the full woodworm lifecycle
• Penetrates deep into timber – reaches joints, corners, and end grains
• Low-odour formula – keeps your home comfortable during treatment
• Quick-drying – minimises downtime and lets you get back to work
• Ready-to-use – no mixing, easy brush or injection application

Pros

1. Effective against active woodworm infestations
2. Easy application
3. Fast-drying, low-odour formula

Cons

1. Limited coverage per litre – best for small to medium jobs
2. Requires bare wood for best results

Why We Recommend Rentokil Woodworm Killer Solution

It’s ideal for homeowners who want a reliable, no-nonsense woodworm treatment from a trusted pest control brand. The product goes straight to the source, eliminating larvae while leaving your timber ready for years of protection. For beams, floorboards, or furniture, it’s a practical, hassle-free option.

Check prices on Amazon: Rentokil Woodworm Killer Solution 1L

9. Barrettine Premier Woodworm Killer Spray – 500ml

Best for: Timber that needs traditional, deep-penetrating protection indoors or outdoors.

While so many woodworm treatments exist, Barrettine stands out for jobs that demand a trusted, time-tested approach. The formula uses spirit and oil, which naturally sink deep into the wood, reaching joints, grains, and hidden corners. This ensures effective treatment of larvae, eggs, and adult beetles, giving your timber lasting protection without relying on gimmicks or unnecessary additives.

Key Features

• Spirit/oil-based formula – penetrates deeply for thorough protection
• Tackles all woodworm stages – larvae, eggs, and adult beetles
• Suitable for indoor and outdoor timber – versatile for furniture, beams, and floorboards
• Trusted heritage brand – decades of experience in timber care

Pros

1. Deep, lasting protection for a variety of timbers
2. Works on indoor and outdoor wood – highly versatile
3. Proven formula with industry heritage

Cons

1. Avoid plastics and roofing felts – they may react with the formula
2. 500ml may not cover very large projects

Why We Recommend Barrettine Premier Woodworm Killer Spray

It’s a solid choice when you want reliable, heritage-backed protection for your timber. The spirit/oil formula penetrates deeply, tackling all life stages of woodworm while allowing you to work on furniture, beams, or structural timber with confidence.

Check prices on Amazon: Barrettine Premier Woodworm Killer Spray – 500ml

Read our other helpful resources: Woodworm Treatment Costs Explained: Prices, Factors and How to Save

10. Ronseal RSLWK5L 5 Litre Woodworm Killer

Best for: Larger timber projects needing deep, long-lasting protection.

It would be unfair if we wrapped up our discussion on the best woodworm treatments without talking about Ronseal RSLWK5L 5 Litre Woodworm Killer. Ideal for larger timber projects, this treatment combines deep penetration with long-lasting protection, ensuring even dense beams and floorboards stay safe from wood-boring beetles.

Its natural formulation is designed to tackle beetles, larvae, and eggs, giving your timber a thorough defence that lasts for years. Applying it is straightforward, letting you coat extensive areas without fuss while knowing the protection goes deep into the wood.

Key Features

• Deep penetration – reaches the core of the timber to eliminate infestations effectively
• Long-lasting – provides protection that endures for several years
• Treats all life stages – kills beetles, larvae, and eggs
• Large coverage – 5L is ideal for big projects like beams, joists, and flooring
• Easy application – simple to apply across interior timbers

Pros

1. Comprehensive protection – defends against existing and future woodworm
2. Economical for large jobs – big 5L volume covers more timber
3. Trusted brand – Ronseal has a long-standing reputation in woodcare
4. Straightforward use – minimal effort for full coverage

Cons

1. Large size may be excessive for small furniture pieces
2. Requires careful application to avoid overspill on surrounding surfaces

Why We Recommend Ronseal RSLWK5L Woodworm Killer

Perfect for larger indoor timber, Ronseal penetrates deep to tackle beetles, larvae, and eggs, providing long-lasting protection with minimal fuss. Its 5L size makes it ideal for big projects while keeping the application simple.

Check prices on Amazon: Ronseal RSLWK5L 5 Litre Woodworm Killer

A Quick Buying Guide to the Best Woodworm Treatment Sprays

1. Type of Infestation

Different sprays target different wood-boring insects. Check whether the product is effective against beetles, larvae, and eggs. Some formulas are more powerful, suitable for severe infestations, while others are preventive.

Related article for more information: How to Treat Woodworm in Floorboards

2. Wood Type and Location

Consider whether you’re treating softwood or hardwood, and whether the timber is indoor or outdoor. Low-odour, water-based sprays are better for indoor use, whereas solvent-based treatments may be more durable for exterior wood.

3. Penetration Depth

A spray that penetrates deeply ensures hidden joints, end grains, and dense timber are protected. Shallow treatments may leave untreated spots where reinfestation can occur.

4. Coverage and Size

Match the spray volume to your project. Small bottles suit furniture or small projects, while large bottles (like 5L) are better for beams, joists, and floorboards. Check the coverage per litre on the label.

5. Drying Time and Finish

Some sprays allow recoating with paint, stain, or varnish quickly, while others require longer drying. If you plan to finish the timber, choose a product compatible with your preferred coatings.

6. Brand Reputation

Established brands with long-standing woodcare expertise often provide more reliable protection and clearer instructions. Reading reviews can give insight into real-world performance.

Final Thoughts

Woodworm may be small, yet the damage they cause can quickly add up if left untreated. Fortunately, the right spray makes tackling the problem straightforward. First, think about the type of infestation and whether it’s light or severe.

Next, consider the location of your timber—indoors or outdoors—and whether you’ll want to finish it with paint or varnish afterwards. Then, look for trusted brands with proven performance to ensure lasting protection. Finally, don’t wait until the damage spreads. Explore our top 10 recommended sprays above and choose the best match to keep your home strong, safe, and woodworm-free.

Answering Your Questions on Woodworm Treatment Spray