Jason Markk Repel Pump Spray Jason Markk Repel creates a durable, breathable barrier that effectively repels liquids and stains. It’s water-based formula is safe to use on all materials like suede, nubuck, leather, nylon, canvas and more. Jason Markk have totally redesigned the Repel to deliver a “better-than-aerosol” spray quality. Engineered with multi-patented technologies, a fine mist combined with a continuous spray functionality covers large areas quickly and evenly in all directions. With the smart, re-usable head and convenient refill features added in, Repel is much more environmentally friendly than hazardous aerosols.