Creosote, the most widely used preservative for pressure treatment of Electricity Board and GPO transmission poles in the United Kingdom has, when correctly applied, given good performance over a long period of time. Perhaps its only disadvantage as a preservative in the above fields is its tendency to exude or 'bleed' from a proportion of treated poles upon exposure to solar heat. This causes the poles to become oily making them difficult to handle during erection and maintenance and occasionally it causes annoyance to the general public who can soil clothes by brushing against such poles.

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