Synthetic varnish for wood: a UK buying guide

Updated: October 2026

You are standing in front of a wooden door that needs a clear finish, but the search results show 100 ml bottles intended for paintings.

You are standing in front of a wooden door that needs a clear finish, but the search results show 100 ml bottles intended for paintings. Before you buy synthetic varnish for wood, identify whether the product is a decorating varnish or an artist’s coating: the same search phrase can lead to very different materials. Our synthetic varnish comparison covers small acrylic varnishes sold for art and craft work on amazon.co.uk, rather than full-size tins for doors, tables or floors. This guide explains the distinction, the useful trade-offs and the point at which you should leave that comparison and choose a joinery product instead.

Our top picks

Badge	Product	Binder as listed	Finish	Surfaces as listed	Note	Price	Offer
Best overall	Liquitex Liquitex Professional satin	Acrylic	Satin	Paper, canvas, wood	9.0	about £14.93	View offer
Alternative	EIGTWEN EIGTWEN gloss and matte	Acrylic	Gloss and matte	Canvas and wood	7.8	about £14.36	View offer
Best value	Baker Ross Baker Ross FE585 gloss	Water-based	Gloss	Metal, plastic, wood	8.8	about £8.99	View offer

Best overall

Liquitex Liquitex Professional satin

9.0/10about £14.93

View offer

Alternative

EIGTWEN EIGTWEN gloss and matte

7.8/10about £14.36

View offer

Best value

Baker Ross Baker Ross FE585 gloss

8.8/10about £8.99

View offer

On this page

1.What “synthetic varnish” means on a UK tin
2.Acrylic, alkyd or polyurethane
3.The VOC line, and when it is not this bottle
4.Sheen, pack size and claims to check

What “synthetic varnish” means on a UK tin

In decorating language, synthetic varnish commonly refers to a solvent-borne varnish made with a synthetic resin, often an oil-modified alkyd. It is typically sold for timber such as doors, frames and furniture. The bottles in our comparison are mainly acrylic artist and craft varnishes in capacities of roughly 100–250 ml. Their labels may mention gloss, satin or matte finishes, but that does not turn them into trim varnish. Start with the object, not the word “synthetic”. For a dry acrylic painting or a small indoor craft, continue to the guide to synthetic varnish on acrylic paintings. For a door, tabletop or other working surface, look for a UK decorating varnish whose technical sheet explicitly names that substrate and use. Our synthetic varnish versus polyurethane guide covers that fork.

Acrylic, alkyd or polyurethane

Acrylic varnish is not one single product class. A water-based acrylic decorating varnish can be made for painted woodwork, while an acrylic artist varnish can be formulated for a flexible paint film on canvas. The latter should not be assumed to tolerate knocks, cleaning and repeated contact merely because “acrylic” appears on the label. Alkyd varnish uses a resin modified with oils and is commonly solvent-borne. Polyurethane is also a resin used in varnish, not always a completely separate layer that you apply after “varnish”. Choose a product labelled for the actual surface and location.

Testsieger

Liquitex Liquitex Professional satin

9.0/10about £14.93

View offer

The VOC line, and when it is not this bottle

UK rules set volatile organic compound limits for certain decorative paints and varnishes. Under Schedule 2 of SI 2012/1715, subcategory (e), interior or exterior trim varnishes and woodstains have ready-to-use limits of 130 g/l for water-borne coatings and 400 g/l for solvent-borne coatings. Those figures concern building trim products in that regulated category; they should not be quoted as though they were measurements printed on an artist’s varnish bottle. “Low odour” and “water-based” can be useful practical descriptions, but neither phrase by itself states the VOC content. Application method also changes the exposure decision. The Health and Safety Executive’s paint guidance distinguishes ordinary brush or roller work from spraying, which creates a mist that can be inhaled. Do not treat a bottle’s general “non-toxic” marketing bullet as respiratory guidance for spray work.

Sheen, pack size and claims to check

Gloss, satin and matte describe sheen, not the underlying resin or the product’s durability. Decide first whether the varnish is suitable for your substrate; only then choose how reflective you want the finish to look. Pack size should be checked against the manufacturer’s coverage figure rather than guessed from photographs or marketplace cells. Listings can disagree about millilitres. The comparison set sits at about £9–£15 in the dated research extracts, but those small packs are not a sensible benchmark for a decorating tin. Our best synthetic varnish page compares value only within the artist and craft set; it does not recommend a bottle for a wooden door. “Non-toxic” in a product bullet is not, by itself, a named certificate, proof of food-contact suitability or evidence of a particular timber-performance test.

Common questions

Is synthetic varnish the same as acrylic varnish?

Not necessarily. In UK decorating, synthetic varnish often means an oil-modified alkyd coating, whereas acrylic varnish uses an acrylic binder and may be water- or solvent-borne. Both terms also cover products designed for different surfaces. Check whether the technical sheet names woodwork, furniture, floors, paintings or craft items rather than choosing from the resin word alone.

Can I use artist varnish on a wooden door?

You should not assume that you can. A small artist varnish is formulated around picture or craft requirements and may not provide the coverage, adhesion or wear resistance needed by a frequently handled door. Choose a decorating varnish whose manufacturer explicitly lists doors or interior woodwork, and follow its preparation and coat instructions.

Is water-based acrylic varnish always lower in VOCs?

The statutory limit for water-borne trim varnish is lower than the solvent-borne limit, but that does not reveal the VOC figure for an individual bottle. Check the product’s declared value and regulatory category. An artist varnish may not be a subcategory (e) building-trim product at all, so avoid applying the trim limits to it without evidence.

Can I thin every acrylic varnish with water?

No. “Water-based” does not automatically mean “safe to dilute”. Some decorating varnishes allow limited dilution for a porous first coat, while other products instruct you not to add water because it can disrupt levelling, sheen or film formation. Use only the ratio and circumstances stated on the exact product’s label or technical sheet.

Does “non-toxic” mean a varnish is food-safe?

No. A general non-toxic claim is not proof that a cured coating has been assessed for food contact, children’s toys or a named standard. If you are finishing a worktop, chopping board, toy or item that may be mouthed, require an explicit statement covering that use. Otherwise, choose a different verified product.

When should I leave the artist-varnish comparison?

Leave it when the job is a door, floor, table, exterior timber or another surface exposed to regular wear or weather. Those projects need a coating specified for the substrate, location and level of use, usually in a decorating-size tin. Stay with the comparison only for a painting or small craft that matches the bottle’s stated purpose.

Best acrylic varnish in this set