Tanning oils for use in the manufacture of leather, oils for hardening leather, vetch in the nature of a plant derivative used as an agent for tanning; epoxy putty for use in repairing leather shoes, glues for leather, epoxy putties for repairing leather, products for hardening leather, namely, sulphited oil, bi-sulphited oil, oxidized oils, raw oils, animal oils, synthetic oils, 2K Polyurethane systems, silicones, surfactants; products for preparing leather, namely, tanning agents, fillers, ...