... excellent weather ability 4.high quality Youngsun Fiberglass Cloth with silicone rubber coated is constructed from a fiberglass base cloth ... specially compounded silicone rubber, which enhanced the strength, fireproof, high temperature insulation ozone, oxygen, sun, weather and oil workability. ... to 10 years. 3. High insulation: dielectric constant from 3 to 3.2, breakdown voltage from 20 to 50KV/mm 4. ...