Silicon rubber (heat-resistant technical plate), Rivne region.

Basic technical characteristics and physical and mechanical indicators:
Tensile strength at break, not less than: 6.0 Mpa.
Plates made of biologically inert materials based on siloxane rubbers (silicones) are produced in various sizes, with a thickness of 1 to 40 mm, a hardness of 20 (spongy) to 80 Shor units.
These products withstand long-term exposure:
high and low temperatures (from -50 °C to 280 °C, briefly up to 320 °C).
electric field up to 20 ÷ 30 sq/mm,
ozone, oxygen, various oils,
of boiling water, while water absorption does not exceed 1-2%.
in terms of gas permeability, they are 10 ÷ 20 times superior to organic rubbers. non-toxic, inert to physiological fluids. resistant to diluted solutions of salts, acids and bases.
Physical and mechanical properties:(//tractor-service.com)
Tensile strength not less than 60 ÷ 80 kgf/cm sq.
Elongation at break is not less than 300%
Hardness 20 ÷ 80 units. Shora
Density 0.2 ÷ 1.3 g/cm³.
Resistance to chemical media:
Water.
Salts: sodium carbonate, copper sulfate, iron chloride, sodium chloride.
Bases: ammonium hydroxide, KOH (25%), NaOH (20%).
Acids: nitric - (10%), sulfuric - (30 ÷ 50%), hydrochloric - (10 ÷ 18%), stearic acid, acetic acid - (30%), phosphoric acid.
Ammonia, oxygen, hydrogen peroxide, ethylene glycol, ethyl alcohol, acetone.
Food products: beer, wine, alcohol,table vinegar, melted butter, confectionery and bakery products.