Written by Paul Worrall
Paint markers occupy a genuinly useful space in the artist’s toolkit — somewhere between a paintbrush and a pen, offering the opacity and coverage of acrylic paint with the control and convenience of a marker. They work on surfaces that traditional paint and brush combinations struggle with: glass, metal, stone, ceramic, wood, plastic, fabric, canvas. They’re the tool that mixed media artists reach for when they want precise opaque marks, that illustrators use for bold line work over painted backgrounds, and that rock painters and street artists have made central to their practice. The category is dominated by one name above all others — Posca — but the landscape around it is more interesting than it might first appear.
I’ve spent sixteen years in the UK art supplies industry and now run Discount Art Supplies, used by over 36,000 UK artists every week. Paint markers come up regularly in our community — particularly among mixed media artists who use them alongside watercolour, acrylic and collage. Here’s the honest guide. And check our live paint marker price comparison before buying — prices vary meaningfully between UK stockists.
⭐ Best Paint Markers UK — Quick Picks
Best overall — the benchmark: Uni Posca Paint Markers — water-based acrylic, works on 50+ surfaces, consistent flow, the standard against which all others are measured.
Best professional/refillable: Molotow One4All — refillable, interchangeable tips, UV resistant, rated for outdoor use. The serious artist’s upgrade from Posca.
Best for fine art and archival quality: Liquitex Professional Paint Markers — artist-grade acrylic pigments, archival, integrates with the full Liquitex paint system.
Best for outdoor and permanent use: Sharpie Oil-Based Paint Markers — oil-based rather than water-based, genuinly permanent on metal, glass, ceramic and outdoor surfaces.
Best budget set: Artistro Paint Markers — wide colour range, low-risk entry point for beginners exploring the medium.
Best for canvas and mixed media specifically: Posca PC-5M Medium Tip — the single most recommended size in the Posca range, the right starting point for most artists.
Water-Based vs Oil-Based Paint Markers — What Actually Matters
The most importent practical distinction in paint markers is water-based versus oil-based — and it affects surface compatibility, drying time, permanence and cleanup in ways that matter considerably more than brand preference.
Water-based paint markers — Posca, Molotow One4All, Liquitex — use acrylic or water-based paint that cleans up easily with water before drying, is non-toxic and suitable for indoor use, dries relatively quickly, and is compatible with most surfaces without requiring a sealer unless you’re working on non-porous surfaces like glass or metal where the dried paint can scratch off. Water-based markers are the default recommendation for most artists and particularly for anyone working with children or in a home studio environment.
Oil-based paint markers — Sharpie Oil-Based, Uni Posca Oil — dry to a genuinly permanent, water-resistant finish that water-based markers don’t match for outdoor durability or for surfaces where permanence matters absolutely. The trade-off is cleanup (requires mineral spirits rather than water), slower drying time, and stronger odour. For anything going outdoors, on metal, or requiring genuinly permanent marks that won’t be affected by weather or water, oil-based is the right choice.
Uni Posca Paint Markers — The Benchmark
UK Price Comparison
🔍 Compare Posca Prices →Made by Uni in Japan, Posca paint markers have been the reference point for the category for decades and remain the first recommendation for virtually every artist trying paint markers for the first time. The water-based acrylic formula is xylene-free and non-toxic, the valve-based delivery system ensures consistent paint flow without hard starts or blobs, and the coverage is genuinly opaque in a single pass on most surfaces. Posca has been professionally tested on over 50 different surface types — paper, canvas, wood, glass, metal, plastic, fabric, stone, ceramic, rock — without preparation on most of them.
The range covers tip sizes from PC-1MR (0.7mm extra fine) through to PC-17K (15mm broad chisel), with bullet tips, chisel tips, brush tips and calligraphy tips available. The PC-5M medium bullet tip at 1.8-2.5mm is the most popular size and the recommended starting point for most artists — versatile enough for both detail work and broader marks. Colours are vibrant and the white specifically is the genuine opaque white that artists working on dark surfaces consistently praise.
The honest limitations: Posca markers are not refillable, so running out means buying new markers rather than topping up. On genuinly non-porous surfaces like glass and metal a clear coat sealer is needed for permanence. Some lighter colours can read slightly pink on very dark surfaces before drying fully.
Molotow One4All — The Professional Upgrade
UK Price Comparison
🔍 Compare Molotow Prices →Molotow One4All is the paint marker of choice for artists who use them seriously and regularly — refillable with Molotow One4All refill ink, interchangeable tips meaning a worn nib can be replaced rather than the whole marker discarded, and a high-pigment acrylic-based hybrid paint that is UV resistant and rated for outdoor use without a sealer. For artists whose practice genuinly depends on paint markers — illustrators, muralists, street artists, mixed media artists using them extensively — the refillable system makes long-term cost considerably lower than buying disposable Posca markers at scale.
The paint requires a pump action to get flowing initially, which can feel like extra work compared to Posca’s valve system, and the coverage can be slightly less immediately opaque requiring an additional pass on some surfaces. But the durability, refillability and tip replacement system make Molotow the more sustainable and ultimately more economical choice for heavy users. The One4All range is also compatible with Molotow spray paints, which makes it a natural choice for artists who work across both marker and aerosol mediums.
Liquitex Professional Paint Markers — Best for Fine Art
UK Price Comparison
🔍 Compare Liquitex Marker Prices →Liquitex Professional Paint Markers use genuine artist-grade acrylic pigments — the same pigment system as Liquitex Professional Heavy Body and Soft Body paints — which means the markers integrate directly with the Liquitex paint system in a way that matters for artists who use both. Archival, lightfast, with the colour accuracy and quality that professional fine art requires. For artists whose work needs to last — exhibiting painters, illustrators producing work for print — the archival quality of Liquitex markers is the reason to choose them over Posca despite the higher cost per marker.
Sharpie Oil-Based Paint Markers — Best for Permanent Outdoor Use
UK Price Comparison
🔍 Compare Sharpie Paint Marker Prices →Sharpie oil-based paint markers are the recommendation for genuinly permanent marks on difficult surfaces — metal, pottery, wood, rubber, glass, plastic, stone. The oil-based paint is resistant to water, fading and abrasion in a way that water-based markers simply aren’t on exposed surfaces. For outdoor projects, rock painting intended to last, painted furniture, garden ornaments or any application where the marks will face weather and handling, Sharpie oil-based is the reliable choice. Cleanup requires mineral spirits rather than water, and the markers should be used in a well-ventilated space.
Artistro — Best Budget Entry Point
UK Price Comparison
🔍 Compare Artistro Prices →For beginners who want to explore paint markers before committing to Posca prices, Artistro offers a wide colour range at a low-risk price point. The quality doesn’t match Posca for consistency or coverage — some colours require multiple passes and can be streaky — but for someone discovering whether paint markers suit their practice before investing in better materials, Artistro gives you enough to make a genuinly informed decision. The wide set sizes also make Artistro attractive for hobbyists and crafters who want range over quality.
Which Paint Markers Should You Buy?
For most artists trying paint markers for the first time: Posca PC-5M in a starter set — the benchmark exists for good reason. For serious or heavy users who want refillability and outdoor durability: Molotow One4All. For fine art with archival requirements: Liquitex Professional. For genuinly permanent outdoor marks: Sharpie Oil-Based. For beginners on a budget: Artistro.
Compare current UK prices across all major retailers on our live paint marker price comparison before buying.
