"Prevent electrolytic corrosion of screws with counter-sunk heads. Frequently applied in the lighting and electrotechnical industry.
Compulsory by law in many countries.
Furthermore a good protection for countersunk screws. Absorb vibrations."
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.