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OS 45 TYPE III (OS45) Chemical compatibility with O-rings, rubbers, & plastics

OS 45 Type III is a silicate ester-based high-performance hydraulic fluid known for its excellent thermal stability and low volatility. It is used in various high-temperature applications, including aviation and industrial hydraulics. This fluid provides superior lubrication, anti-wear properties, and oxidation resistance, ensuring efficient operation and extended service life of hydraulic systems. OS 45 Type III is formulated to meet stringent industry standards and is suitable for use in environments where conventional hydraulic fluids would degrade. Proper handling and storage are essential to maintain its performance and safety characteristics.

Need OS 45 TYPE III (OS45) resistant plastics, O-rings, rubbers, and seals? Get in touch now!

Canyon Components strives to meet all customer service requests. If you need something that isn't listed below, feel free to contact a Canyon Components product and application consultant and let our knowledgeable staff help you design the perfect part for your needs.

Paint covered o-ring

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Full Chem Table

Custom Gaskets & Cut Parts

Material	Performance	Get a quote
FFKM (CanRez™, Kalrez®, Chemraz®)	Excellent: <15% Swelling	Get a quote
FKM ETP (Viton® Extreme)	Excellent: <15% Swelling	Get a quote
FKM (Viton®)	Excellent: <15% Swelling	Get a quote
NBR (Buna-N, Nitrile)	Acceptable: <15-25% Swelling	Get a quote
HNBR (Hydrogenated Nitrile)	Acceptable: <15-25% Swelling	Get a quote
EPDM (Ethylene Propylene)	Not Recommended: Over 40% Swelling	Get a quote
Aflas® (TFE/P, FEPM)	--- Insufficient Testing Data	Get a quote
Silicone (VMQ, PVMQ)	Not Recommended: Over 40% Swelling	Get a quote
Fluorosilicone (FVMQ)	Acceptable: <15-25% Swelling	Get a quote
Polyurethane (PU, AU)	Not Recommended: Over 40% Swelling	Get a quote
Teflon® (PTFE)	--- Insufficient Testing Data	Get a quote
Neoprene (Chloroprene)	Excellent: <15% Swelling	Get a quote
SBR (Styrene-Butadiene)	Not Recommended: Over 40% Swelling	Get a quote
ACM (Acrylic Rubber)	--- Insufficient Testing Data	Get a quote
Butyl (IIR, Isobutylene Isoprene)	Not Recommended: Over 40% Swelling	Get a quote
Butadiene Rubber (BR)	Not Recommended: Over 40% Swelling	Get a quote
Isoprene Rubber (Polyisoprene)	Not Recommended: Over 40% Swelling	Get a quote
Natural Rubber (NR)	Not Recommended: Over 40% Swelling	Get a quote
Hypalon (CSPE)	Acceptable: <15-25% Swelling	Get a quote

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Metal Piston

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Groove Design References

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Coatings, Packaging, & Other Services

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Custom Parts & Custom O-rings

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