Collection: OTR Hard To Buff

On The Run Hard to Buff refers to the legendary line of ultra-permanent markers and inks produced by On The Run, historical German brand known for its high-quality graffiti and tagging tools. The term “Hard to Buff” literally means that the ink is very difficult to remove or clean, making it ideal for tags, long-lasting markings, and pieces that need to withstand weathering, UV exposure, smudging and attempts at removal. The ink is alcohol-based, highly pigmented deep black, and formulated to be opaque, weatherproof and extremely permanent across many surfaces including metal, glass, stone, canvas and walls — in short, a nightmare for anyone trying to erase it. 

Unlike standard inks, Hard To Buff penetrates surfaces such as concrete, brick, stone, and untreated materials, leaving a shadow or “ghost” even after cleaning. This makes it particularly popular for tagging where longevity is a priority.

Within this range you’ll find a variety of markers designed to suit different styles and needs. The classic OTR.070 Hard to Buff is the flagship piece — a broad-nib marker with a 15 mm tip that delivers rich, saturated black lines perfect for bold tags and visible markings. For those who prefer something more portable, the Hard to Buff Mini offers the same relentless ink performance in a compact format that’s perfect for carrying in a pocket or backpack.

If you’re looking for a slightly finer stroke but still want the signature durability, the Hard to Buff Round Nib 10 mm version brings a rounded 10 mm point that’s excellent for cleaner lines and more controlled writing. Meanwhile, the Hard to Buff Squeeze Pocket Markers — available in both 12 mm and 6 mm versions — give you the freedom of a squeeze-style marker with the same ultra-permanent formula, ideal for quick tagging, sketching or adding extra detail in tight spots.

To keep your markers going strong, the range also includes a 210+ ml bottle of Hard to Buff ink, perfect for refilling empty markers or preparing your own custom marker builds full of this renowned ink. Together, these Hard to Buff products form a cohesive lineup that covers everything from heavy-impact tagging to everyday street use.