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Purosil Silicone Hoses & Assemblies

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Purosil LLC, founded in 1958 in Corona, California, manufactures silicone hoses for heavy-duty diesel, EV, and hydrogen markets, including the JAY20 Series (BlueJay, RedJay, GreenJay) plus turbo, coolant, and CAC hose. Northern Hydraulics supplies and special-orders Purosil silicone hose and assemblies on request. Send us a part number and we will cross-reference the equivalent.

(800) 823-4937

We don't list Purosil products online right now — but we can usually source them or supply a direct replacement. or call (800) 823-4937 — or browse products by other brands:

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Purosil LLC, founded in 1958 and headquartered in Corona, California, manufactures silicone hoses and assemblies for heavy-duty diesel, EV, and hydrogen specialty markets. The company is active and builds silicone and EPDM knit hose, clamps, and hose fittings — not hydraulic pumps, cylinders, or valves. Because Purosil silicone hose sits outside the hydraulic power components Northern Hydraulics stocks day to day, we supply it on a special-order and cross-reference basis: send a Purosil part number and we identify the current equivalent.

Purosil Product Lines & Series

Purosil’s catalog centers on the JAY20 Series of SAE J20 R1 Class A coolant and radiator hose. BlueJay is polyester-reinforced and rated -40°F to 350°F; RedJay is aramid-reinforced and rated -40°F to 500°F for hotter charge-air and turbo runs; GreenJay is a single-ply polyester heater-hose variant. Beyond the JAY20 family, Purosil builds heater, coolant, and radiator hose, marine wet exhaust hose, air-to-air and CAC (charge-air cooler) hose, turbo hose, vacuum hose, and silicone and EPDM knit hose, plus matching clamps and fittings.

Cross-Referencing Purosil Parts

The value here is matching a Purosil part number to an equivalent you can buy. Confirmed part-family prefixes include 70-xxx, 80-xxx, PUR-99-xxx, and 3641-xxx. Send us the number stamped on a BlueJay, RedJay, or GreenJay assembly and we match it by bore, temperature rating, reinforcement type, and SAE J20 R1 Class A spec — returning the current Purosil equivalent or a compatible silicone hose. If you are holding a legacy or hard-to-source Purosil hose, we work the cross-reference for you. Request a Purosil cross-reference quote and we will source the equivalent part.

Purosil – Frequently Asked Questions

Is Purosil still in business?

Yes. Purosil LLC, founded in 1958 and based in Corona, California, is an active manufacturer of silicone hoses and assemblies for heavy-duty diesel, EV, and hydrogen specialty markets.

What does Purosil make?

Purosil makes silicone and EPDM hose products, including the JAY20 Series (BlueJay, RedJay, GreenJay) coolant and radiator hoses, plus heater, turbo, vacuum, marine wet exhaust, and charge-air cooler (CAC) hose, along with clamps and fittings. It does not make hydraulic pumps, cylinders, or valves.

Does Northern Hydraulics sell Purosil parts?

We supply Purosil silicone hoses and assemblies on request and cross-reference them to equivalents. These are special-order rather than a stocked hydraulic line, so call (800) 823-4937 or submit a quote request to source a specific Purosil part.

What’s the equivalent to a discontinued Purosil part?

Send us the Purosil part number (common families include 70-xxx, 80-xxx, PUR-99-xxx, and 3641-xxx) and we match it by bore, temperature rating, reinforcement type, and SAE J20 R1 Class A spec to a current Purosil equivalent or a compatible silicone hose.

Can you cross-reference an obsolete Purosil part?

Yes. Give us the stamped part number and application details and we will work the cross-reference to find a current equivalent. Request a cross-reference quote to get started.

What is the difference between Purosil BlueJay and RedJay hose?

Both are SAE J20 R1 Class A JAY20 Series hoses. BlueJay is polyester-reinforced and rated -40°F to 350°F, while RedJay is aramid-reinforced and rated to a higher -40°F to 500°F for hotter applications.

Need help choosing Purosil parts?

Talk to a hydraulics specialist or send a quote request — we respond the same business day. (800) 823-4937 sales@northernhydraulics.net