A liquid stencil waterproofing agent designed to enhance stencil durability for exceptionally long print runs. Formulated for use with polyester mesh (not suitable for nylon mesh), this solution strengthens stencils, ensuring extended performance and resistance to wear. While stencils treated with Screen Hardener can still be decoated, removal becomes more challenging. Ideal for high-volume screen printing, this chemical provides added resilience and longevity to stencils, improving overall printing efficiency.