viton coating for PU timing belt

viton coating(chemically known as FKM or Fluoroelastomer) is a rubber coating that can withstand high temperatures.represents the highest echelon of surface protection against extreme heat and aggressive chemical environments.

Product information Sylomer brown

Coating material	Fluorocarbon rubber
Colour	black
Hardness	75° Shore A
Thickness	2/3mm
Minimum pulley diameter	20x coating thickness
Maximum operating temp. ℃	-20°C / +250°C (short acting range +275°C)
General remarks	withstand high temperatures，corrosion resistance，Ozone and Environmental Immunity
Tolerance for total thickness (timing belt + coating)	±0.2mm (ground ±0.3 mm possible)

. Material Science: The Viton Matrix

The extreme resilience of a Viton coating comes from its molecular structure. The carbon-fluorine bonds within the FKM matrix are incredibly strong and tightly packed, giving the coating its defining characteristics:

• Unmatched Temperature Thresholds: Viton coatings remain structurally stable and flexible at continuous operating temperatures ranging from -20°C to +250°C (-4°F to +482°F), and can withstand intermittent spikes up to 275°C (527°F).
• Universal Chemical Shielding: Unlike standard NBR, PVC, or PU, Viton is virtually impervious to aggressive organic solvents, concentrated acids, aromatic hydrocarbons (benzene, toluene), jet fuels, hydraulic fluids, and petroleum-based oils.
• Ozone and Environmental Immunity: It resists severe atmospheric aging, high UV exposure, and ozone cracking, making it ideal for high-voltage electrical environments or outdoor marine applications.