Five different commercial formulations of bodied mayonnaise emulsions were applied to samples of Scots pine (Pinus sylvestris) sapwood as recommended by the manufacturers. Penetration and loading characteristics were determined by measuring the distribution profiles of the active ingredients after various intervals of time. The changes in the general appearance of the emulsions on the surface of the treated wood was also observed. It was concluded that the nature of the formulation can affect the speed and extent of penetration of the active ingredients into the timber and that the simple expedient of applying more emulsion to the surface of the wood does not necessarily lead to increases in penetration and loading. Application of bodied mayonnaise preparations appears a reasonable option for the remedial treatment of insect attack, particularly where spot treatment is adequate. However, treatment against wood-destroying fungi may not provide sufficient protection in the longer term where the risk of attack is relatively high. It is recommended that further work be carried out to confirm the findings of this limited study.

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