EMR Shielding Solutions EMF Shielding Paint YShield HSF74 5 Liter High water resistance and environmentally friendly. Very good Ecologically. Attenuation of 37dB (effectiveness of 99.98%) one layer, 45dB (effectiveness of 99.997%) two layers Perfect corrosion resistance: no metalic particles, no oxidizing, provides long term durability Not frost resistant, shipping only on temperatures over 0C or with UPS Express. Ingredients: Potassium silicate, water, graphite, carbon black, additives