Steel wire can be used outdoors, but because of the strain placed on the wires from other sources (for example, the wind), this can increase the total strain considerably. Our systems are designed for indoor use only. Perlon is not recommended for outdoor use, because of the (more extreme) impact of moisture and UV light. When less of a strain is placed on the wires and when these are replaced regularly, the system could be used outdoors in certain cases, however we advise against this and will not provide any guarantees to this end.