Product Details
Product Details
The Flexfab 5526-038 is a blue silicone, 1-ply nylon hose engineered for demanding engine environments. It resists hardening, cracking, cold leaks, aging, and many chemicals, making it a durable, long-lasting solution for diesel, automotive, marine, agricultural, and industrial cooling systems. The recommended Flexfab clamp for this size is shown in the chart below.
Why this hose
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Blue silicone, 1-ply nylon — durable construction engineered for demanding cooling-system service.
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-65F to +350F range — stays flexible in cold and handles under-hood heat without hardening or cracking.
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Resists hardening, cracking, cold leaks, aging, and many chemicals — long service life where ordinary rubber fails.
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Meets SAE J20 R3 Class A; TMC RP303B Cl I Gr II — engineered to recognized heavy-duty hose standards.
Frequently asked questions
Is this hose fuel-rated?
No. Silicone heater hose is for coolant, radiator, and heater applications — it is not fuel-resistant. Do not use for fuel or oil lines.
What clamp does it take?
Use the Flexfab 2582‑0006 clamp, sized to this hose’s outside diameter. Two clamps per connection is standard practice.
Flexfab 5526 Series — Complete Size & Clamp Chart
Every size in the series. Click a part number to open that product. The clamp column shows the Flexfab clamp(s) that fit each hose OD.
