Q. Can you spray Universal Woodworm & Dry Rot onto cables which are attached to floor boards? And would the product damage the plastic coated cables?
A. Yes so long as you use an airless sprayer. And no it should not affect the cable plastic as once the product is thoroughly dry the solvent will have evaporated therefore causing no problem to the cable. If in doubt though, paint some onto the cable and leave to dry, then see if it has been damaged.