Tehplastina Um Gost 12855 — 77

Universal oil-, heat-, and frost-resistant. It is the most versatile type, typically used in contact with transformer oils.

These technical plates are manufactured in several forms to fit different sealing needs: tehplastina um gost 12855 77

Ozone- and frost-resistant. This type is optimized for outdoor environments where exposure to ozone and low temperatures is a factor. Technical Specifications Type UM (Universal) Type OM (Ozone-Resistant) Operating Temperature -60°C to +100°C -55°C to +50°C (standard) Hardness (Shore A) 55–70 units 70–80 units Tensile Strength min. 6.4 MPa min. 7.8 MPa Service Life Formats and Sizes Universal oil-, heat-, and frost-resistant

The standard defines two main categories based on their resistance properties: This type is optimized for outdoor environments where

is the standard for rubber sheets used specifically in transformers and other electrical equipment . These sheets, often called "transformer plates," are designed to create fixed seals that withstand aggressive environments like transformer oil and extreme temperatures.