HomeBuying GuidesLawn & GardenThe Best Shed Preservers To Buy - Updated 2022

The Best Shed Preservers To Buy – Updated 2022

Why use a shed preservative?

Purchasing a garden shed is a significant financial commitment, and it is wise to devote some time to safeguarding the wood with a shed preserver. After all, it will have to weather the hottest and driest of summers, as well as the wettest and coldest of winters, for as many years as it can stand.

Applying a wood preservative to a garden shed can help to preserve the wood from being attacked by mould, algae, and insects in the long run. Aside from that, many wood preservers contain a small percentage of wax, which provides some limited protection against weathering, including the effects of wind, rain, and sunlight.

It is always recommended that after applying a shed preserver, the shed be over-coated with a suitable top-coat such as an exterior wood oil, shed paint, shed stain, or shed varnish to ensure that the preserver is sealed into the wood grain and that the shed receives the best possible protection from the elements. Your shed will be more durable year after year, and it could even last for decades if it is adequately cared for.

There are several different kinds of shed preservers.


Wood preservatives are available in a variety of forms, but they all perform the same function. Even those that are marketed exclusively for sheds and fences are virtually identical to those that are not marketed expressly for sheds and fences. Clear and coloured variants are available from most manufacturers in either solvent-based or water-based formulations. A little quantity of wax is present in certain varieties, whilst others are absent.

Solvent-based vs water-based shed preservers

The subject of whether water-based or solvent-based shed preservatives are preferable is frequently questioned. The truth is that both types of preservers include the same essential components for preservation. Despite the fact that solvent-based wood preservers tend to penetrate more deeply, water-based wood preservers are more user-friendly and environmentally beneficial. Exterior wood oil or log cabin treatment can be applied over both to seal in the preservative and protect the building from damage caused by exposure to the elements.

What is the best wood preservative to use on sheds and garages?

So, what is the best wood preservative for use in sheds and garages? This is mostly dependent on the type of appearance or finish that is wanted. Use a clear wood preservative to retain the shed’s natural appearance, and then topcoat with a clear external wood oil or decking oil for the best protection. Clear wood oil or clear decking oil can be used to stain or colour sheds. A coloured wood preservative should be used first, followed by a clear wood oil or clear decking oil. Alternatively, a clear preservative can be used first, followed by the application of a coloured decking oil or a coloured wood oil.

It is important to note that if you are using a water-based shed paint or garden paint, be certain that any wood preservative you use does not contain wax, silicon, or oil, since these substances may repel paint from the surface of the shed and prevent it from adhering to the wooden structure.

The Best Wood Preservatives To Buy

Cuprinol 5 Star Complete Wood Treatment (WB) 5 LITRES

Cuprinol 5 Star Complete Wood Treatment (WB) 5 LITRES
  • Great products that allow you to turn even the ugliest of sheds into a pretty feature.
  • clear, low odour, water based, all purpose treatment to prevent insect attack, re-infestation and protect from fungal decay.
  • 2015 water based formula

Cuprinol 5 Star has been and continues to be at the forefront of the industry for more than two decades. For as long as I can remember, it has been the only treatment for wood that I have used, and it is the greatest wood preservative for sheds in my opinion.

A fungus killing, woodworm decimating treatment that is general purpose, one size fits all, and is perfectly suited for safeguarding sheds and outbuildings. On application, you will practically be able to observe dry rot wilt and bubble up in front of your very eyes. To give credit where credit is due, this is a really well-performing product, which is becoming increasingly rare these days. The feature that distinguishes Curpinol 5 Star from the competition is its dependability. This is something I’ve been utilising for the better part of two decades. What’s more, guess what? My shed, which is resting on a concrete foundation, is still in fine condition despite the fact that it was built more than a decade ago. Cuprinol 5 start can be credited with this accomplishment. It’s awful stuff, so make sure you’re wearing a mask and eye protection while working with it. That’s a really good mask, by the way. Gloves are also an excellent choice. Even though I wiped it off within minutes, my skin became red and itching after getting this on my fingers. No, they did not burn off. It clearly demolishes anything biological in a short period of time. Woodworm is included in this category as well. Consequently, if you have an infestation, pull out the sprayer and saturate the wood with this solution. The following is a word of caution: this is wicked awful stuff. Instead of a delicate mist, set it to squirt out instead. You really don’t want to breathe this material in, and a mist will raise the likelihood of doing so by orders of magnitude. According to the marks I made on my hands, your lungs will not be appreciative if you do this.

Yet another word of caution. All of these treatments indicate that dampness is OK for use. I’ll tell you right now that bone dry lumber absorbs moisture (in this case, the treatment) significantly more effectively than wet timber. As a result, treating your shed with hot, bone-dry lumber is the best option. Simply fill the sprayer with water and it will absorb in no time (again remember a squirt setting not fine mist). We have lots of time left in this lockdown, so go ahead and pick your dry. A run like the one we’ve had here at the end of May has been just perfect for me. That is why I am here, reviewing this review in order to remind myself of the task that awaits me tomorrow!

This is crystal clear, will not stain, and cannot be criticised in any way. If you look around the internet, you’ll discover that the only complaints are about the packing or the cost, or even the delivery, but the product itself is second to none and has been for many years. In my opinion, the only reason you would not purchase this product is due to the fact that it is not available at the appropriate time.

Everbuild EVBLJCR05 wood preserver

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Everbuild EVBLJCR05 Wood Preserver, Clear, 5 Litre
  • Based on micro fine active technology and uses ultra-lightfast pigments on the coloured variants to give an even fade-resistant finish which will last for years
  • Fast drying, non-flammable and is suitable for both internal and external surfaces including damp timbers.
  • Ideal for use on rough-sawn or planed timbers such as floorboards, joists, roof timbers, window frames, doors and more
  • Can be used as a pre-treatment which once left to dry for 48 hours can be overpainted, varnished or stained
  • Can be left as the final finish on indoor surfaces, when used externally overpainting or staining is required

Everbuild EVBLJCR05 is a clear wood preserver means that it will not colour or taint your wood in any way. This preservative has a very low odour and is created utilising Micro-fine technology, which makes it extremely effective. The algaecides and fungicides (biocidal chemical components also found in weedkiller) utilised in this technology are correctly disseminated in order to achieve the penetration required by the weedkiller. In order for algae or fungi to attack your wooden shed, you must apply this wood preservative quickly and uniformly throughout the wood structure.

It is possible to use the Everbuild EVBLJCR05 wood preserver even on moist woods because it is a solvent-free product. Whether it’s dry rot or wet rot, this transparent wood preserver liquid can keep your wooden shed safe from the elements. Another advantage of this Everbuild EVBLJCR05 wood preserver is that it is non-flammable, which means that it will safeguard your shed from even the smallest fire. The material dries rapidly and is not damaging to plants once it has been thoroughly dried. Because of the consistency of this product, it is simple to apply with a garden sprayer, and the preservative will penetrate the wood in a short period of time. It has a strong bond with the wood and provides excellent protection. If you want to protect your shed from the elements, you can use varnish or wood paint once the preservative had dried.

Sikkens SIKCHLSPLO5 wood preservers & wood stains – Dark Oak

Sikkens SIKCHLSPLO5 Wood Preservers
  • Cetol HLS Plus Translucent Woodstain Light Oak 5 Litre
  • Cetol HLS Plus Translucent Woodstain Light Oak 5 Litre
  • Cetol HLS Plus Translucent Woodstain Light Oak 5 Litre
  • Model number: SIKCHLSPLO5

Sikkens is a well-known brand in the wood preservation industry, and the Sikkens SIKCHLSPLO5 wood preserver demonstrates why. This is a translucent wood stain that is a version of the Cetol HLS plus stain. It is available in a variety of natural-looking colours and variations. With one litre of Sikkens SIKCHLSPLO5 HLS plus wood preserver, you can coat about 6 – 18 square metres of wooden surfaces. Based on the type of wood used and the state of the wood surface, this figure may differ slightly. This wood preserver dries out relatively quickly; within 5 hours, it is completely dry.

A stunning appearance is achieved by the translucent quality of this liquid when applied to your wooden shed. By providing superior protection against algae and fungi (mould), this wood preserver not only protects the wood, but it also helps to prevent it from cracking and peeling. The Sikkens SIKCHLSPLO5 wood preserver is resistant to ultraviolet light. This aids in the preservation of the natural colour of the wood for a longer period of time by decreasing the impact of ultra violet rays on the wood. The HLS plus wood preserver is water resistant and micro porous, making it ideal for outdoor use. In addition to wooden huts, you may use this to construct a wooden fence. Citole HLS plus is a wood preservative that can be used as a finishing agent as well as a basic preservative. However, relying on this as a stand-alone solution would not be as beneficial as one would want.

Ronseal SFWPDB5L shed & fence wood preservative

Ronseal SFWPDB5L Shed & Fence Wood Preservative Dark Brown 5 Litre
  • Highly penetrative solvent-based wood preserver
  • 2 in 1 preserves and eradicates
  • Superb colour and preservation for long lasting protection
  • Preserves, preventing rot and decay
  • Eradicates, killing woodworm and protecting against re-infestation

Once again, this is a product that is available in a number of different colour options. Dark brown in colour, the Ronseal SFWPDB5L shed and fence wood preservative offered here is made by Ronseal. They also sell additional brown colour varieties, such as autumn and light, in addition to the original. This is a wood preservative that is based on solvents and penetrates deeply into the wood. When exposed to oxygen, solvent-based paints and wood preservatives dry out more quickly than when not exposed to oxygen. Another advantage of using a solvent-based preservative is that it can protect your shed against insects such as wood worms while also preventing re-infestation. So the Ronseal SFWPDB5L shed and fence wood preservative can assist you in keeping your shed free of decay and rot for longer periods of time.

You could even call this a “two-in-one” preservative because it has the ability to both eliminate any present infestation and prevent against future infestations. This product is water resistant and comes in a metal can that holds 5 litres. If you would like to give your shed a brown colour, you may purchase this product and feel confident that your wooden shed is in good hands.

Cuprinol Ducksback 5 Year Waterproof for Sheds and Fences, 5 L – Forest Oak

Cuprinol Ducksback 5 Year Waterproof for Sheds and Fences, 5 L - Forest Oak
  • 5 years protection
  • Non drip easy application
  • Shower proof in 1 hour
  • Wax enriched water repellent

We are often sceptical of treatments that claim to be intended for use on sheds because many of them are merely standard external wood preservatives that are being sold to a specific market segment. Cuprinol Ducksback, on the other hand, is distinct, and the reason for this distinction is that it is enriched with wax.

As previously said, using a wax-enriched exterior wood preservative will limit your options when it comes to selecting a top coat; nevertheless, in the case of sheds, we believe this is a good trade-off to make. To our way of thinking, sheds are significant financial investments, and if any portion of them becomes compromised, you may find yourself having to replace the entire shed (whereas with, say, a fence, you could just repair the damaged part).

The fact that sheds generally house objects such as bicycles and/or gardening equipment, which can be expensive and hard to repair if they are damaged as a result of water entering inside the shed, is another argument in favour of employing a wax-enriched exterior wood preservative for a shed.

Other benefits of Cuprinol Ducksback include the fact that it doesn’t drip, has a mild scent and is safe to use near plants, pets, and children.

Wood Preservers FAQs

Top tips before applying a shed preservative

If there is already mould, algae, or fungi on the shed surface, it must be cleaned with a suitable mould and algae cleanser or fungicidal wash before applying a wood preservative to prevent further growth. Preservers are intended to aid in the prevention of biological growth, but they will not eliminate it if it has already taken hold. If mould, algae, or lichens are already present on the wood, use a suitable shed cleaner to remove the mould, algae, and lichens from the wood surface.

Despite the fact that wood preservers are completely harmless to humans, plants, and animals when fully dried, they are extremely detrimental to aquatic systems and should be kept away from garden ponds, streams, sewers, and other water courses to avoid contamination. Children and pets should be kept away from fluids and freshly treated sheds until they have dried completely.

When applying a coloured preserver, always cover and protect goods and areas that are not to be treated. This is especially important when working with stone, concrete, plastic surfaces, and plants. Colored wood preservers will quickly discolour these surfaces and may even cause some types of plastic to disintegrate completely.

Sealing in a shed preservative

Despite the fact that many (but not all) wood preservatives contain a modest amount of wax, they do not necessarily provide long-lasting weather protection. Garden sheds that have been treated with a shed preservative can usually be treated with an exterior wood oil that is specifically designed for garden sheds after the preserver has dried completely, which is usually after 72 hours. This will help to seal in the wood preserver and provide the best all-around wood protection. In addition to keeping shed timbers supple and nutritious, it will also defend against water infiltration and weathering. Some exterior wood oils also contain UV filters, which will aid in the preservation of the shed’s colour for a longer period of time.

The shed will be treated with a water-based oil, paint or stain if it is to be painted or stained. It is critical that the preservative does not contain any wax or silicon, among other things. Preservatives containing wax will repel water-based top coats and will prevent them from adhering to the wood when applied.

Can shed preservatives be spray applied?

This is dependent on the sort of shed preserver that is being sprayed as well as the immediate environment. When it comes to spraying a wooden shed, there are a few things to keep in mind. In the first place, many preservers contain biocides and fungicides, which protect sheds against biological growth as well as insect infestation. It is not recommended to breathe in the tiny mist created by spraying. Overspray is another factor to consider. It is feasible and likely that coloured shed preservers will stain porous surfaces like as stone or paved patios, rockeries and paths, among other things, and that it will be difficult, if not impossible, to remove.

Can I use just a wood preservative on my shed?

Biological threats such as mould, algae, wood rot, and insect attack are effectively protected against by wood preservers, although they do not provide much protection against the elements in the long run. Use a wax-free wood preserver to ensure that the protective features of the preserver are maintained and that the wood is better protected against weathering. Once the preserver has been allowed to dry completely, treat the shed with an oil-based shed treatment or Log Cabin Treatment in either clear or coloured form. The use of a preservative that contains wax will prevent the application of a water-based treatment or paint on top of it since the wax will simply reject the top-coat and cause it to flake off.

Can I paint my shed after using a wood preservative?

This is dependent on the sort of wood preserver and top-coat that is being used on the project. Briefly stated, you cannot paint over a water-based preserver that contains water repellent qualities such as wax or silicon with a water-based paint, for example. A wax-free preserver is the greatest option because it may be overcoated with nearly any sort of topcoat, such as water-based paints, wood oils, external varnishes, and stains on the exterior of the house.

Which type of paint should I use on my shed?

There is a wide variety of outdoor wood paints and garden paints available that are ideal for painting wooden shelters. Which one is the best is mostly determined by which type of colour best matches your expectations. Different goods and manufacturers may provide performance guarantees as well as other distinguishing characteristics like as UV resistance or resistance to mould and algae, among other things. Decide on a paint that best matches your colour preferences while also meeting your performance goals. Never use an interior paint on an external surface since interior paints are just not built to withstand the elements and will soon begin to peel and flake off as the weather changes.

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