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Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant

Flexfab 5581-100X12, 1.00" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 25mm

by Flexfab
€198,95 - €198,95
€198,95
€198,95 - €198,95
€198,95
Request a Quote (Bulk & Dealer Orders)

Quick Specs

BrandFlexfab
Series5581
TypeHose
Body Size1"
Length12 ft
ColorBlue

Performance & Construction

Construction Silicone hose w/ 4-ply polyester reinforcement
Inside Diameter 1.00" (25.0 mm)
Outside Diameter 1.39" (35.0 mm)
Actual Burst Pressure 550.0 PSI
Working Pressure ~183 PSI (1/3 of burst)
Temperature Range -65F to +350F
Wall Thickness .170"/.220"
Standards SAE J20 R1 Class A; TMC RP303B Class I Grade II
Origin Made in USA

Product Details

Product Details

The Flexfab 5581-100X12 is a silicone hose w/ 4-ply polyester reinforcement 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

  • Silicone hose w/ 4-ply polyester reinforcement — durable construction engineered for demanding cooling-system service.
  • -65F to +350F range — stays flexible in cold and handles under-hood heat without hardening or cracking.
  • Resists hardening, cracking, cold leaks, aging, and many chemicals — long service life where ordinary rubber fails.
  • Meets SAE J20 R1 Class A; TMC RP303B Class I Grade II — engineered to recognized heavy-duty hose standards.

Frequently asked questions

What clamp does it take?
Use the Flexfab 2582‑0016 or 2584‑0175 clamp, sized to this hose’s outside diameter. Two clamps per connection is standard practice.

Flexfab 5581 & 5501 Series — Complete Size & Clamp Chart

Every size in the series. The 5581 (blue) and 5501 (green) hoses are the same construction in different colors. Click a part number to open that product. The clamp column shows the Flexfab clamp(s) that fit each hose OD.

Blue
5581		 Green
5501		 ID
(in)		 ID
(mm)		 OD
(in)		 OD
(mm)		 Actual
Burst		 SAE TMC Weight
(lb/ft)		 Matching
Clamp
5581‑038
5581‑038X12 		— 0.38" 10.0 0.77" 20.0 600.0 PSI 425.0 125 0.16 2582‑0006
5581‑050
5581‑050X12 		5501‑050
5501‑050X12 		0.50" 13.0 0.89" 23.0 600.0 PSI 425.0 125 0.2 2582‑0008
5581‑062
5581‑062X12 		5501‑062
5501‑062X12 		0.63" 16.0 1.02" 26.0 585.0 PSI 425.0 125 0.24 2582‑0010
5581‑075
5581‑075X12 		5501‑075
5501‑075X12 		0.75" 19.0 1.14" 29.0 575.0 PSI 325.0 125 0.29 2582‑0012
5581‑087
5581‑087X12 		5501‑087
5501‑087X12 		0.88" 22.0 1.27" 32.0 560.0 PSI 300.0 125 0.34 2582‑0016
5581‑100
5581‑100X12 		5501‑100
5501‑100X12 		1.00" 25.0 1.39" 35.0 550.0 PSI 300.0 125 0.39 2582‑0016 or 2584‑0175
5581‑112
5581‑112X12 		5501‑112 1.13" 29.0 1.52" 39.0 525.0 PSI 300.0 125 0.44 2582‑0020 or 2584‑0175
5581‑125
5581‑125X12 		5501‑125
5501‑125X12 		1.25" 32.0 1.64" 42.0 500.0 PSI 275.0 125 0.49 2582‑0020 or 2584‑0212
5581‑138
5581‑138X12 		5501‑138 1.38" 35.0 1.77" 45.0 475.0 PSI 250.0 125 0.54 2582‑0024 or 2584‑0212
5581‑150
5581‑150X12 		5501‑150
5501‑150X12 		1.50" 38.0 1.89" 48.0 450.0 PSI 250.0 125 0.59 2582‑0024 or 2584‑0212
5581‑162
5581‑162X12 		5501‑162 1.63" 41.0 2.02" 51.0 425.0 PSI 225.0 125 0.63 2582‑0028 or 2584‑0262
5581‑175
5581‑175X12 		5501‑175
5501‑175X12 		1.75" 44.0 2.14" 54.0 400.0 PSI 225.0 125 0.68 2582‑0028 or 2584‑0262
5581‑187
5581‑187X12 		5501‑187 1.88" 48.0 2.27" 58.0 400.0 PSI 200.0 100 0.73 2582‑0032 or 2584‑0262
5581‑200
5581‑200X12 		5501‑200
5501‑200X12 		2.00" 51.0 2.39" 61.0 400.0 PSI 200.0 100 0.78 2582‑0032 or 2584‑0262
5581‑212
5581‑212X12 		5501‑212 2.13" 54.0 2.52" 64.0 375.0 PSI 175.0 100 0.83 2582‑0036 or 2584‑0312
5581‑225
5581‑225X12 		5501‑225
5501‑225X12 		2.25" 57.0 2.64" 67.0 350.0 PSI 175.0 100 0.88 2582‑0036 or 2584‑0312
5581‑238
5581‑238X12 		5501‑238 2.38" 60.0 2.77" 70.0 325.0 PSI 150.0 100 0.93 2582‑0040 or 2584‑0312
5581‑250
5581‑250X12 		5501‑250
5501‑250X12 		2.50" 64.0 2.89" 73.0 300.0 PSI 150.0 100 0.98 2582‑0040 or 2584‑0312
5581‑262
5581‑262X12 		5501‑262 2.63" 67.0 3.02" 77.0 285.0 PSI 125.0 100 1.02 2582‑0044 or 2584‑0362
5581‑275
5581‑275X12 		5501‑275
5501‑275X12 		2.75" 70.0 3.14" 80.0 275.0 PSI 125.0 100 1.07 2582‑0044 or 2584‑0362
5581‑287
5581‑287X12 		5501‑287 2.88" 73.0 3.27" 83.0 250.0 PSI 100.0 100 1.12 2582‑0048 or 2584‑0362
5581‑300
5581‑300X12 		5501‑300
5501‑300X12 		3.00" 76.0 3.39" 86.0 250.0 PSI 100.0 100 1.17 2582‑0048 or 2584‑0362
5581‑312
5581‑312X12 		— 3.13" 80.0 3.52" 89.0 225.0 PSI 75.0 100 1.22 2582‑0052 or 2584‑0412
5581‑325
5581‑325X12 		5501‑325 3.25" 83.0 3.64" 92.0 225.0 PSI 75.0 100 1.27 2582‑0052 or 2584‑0412
5581‑338
5581‑338X12 		— 3.38" 86.0 3.77" 96.0 200.0 PSI 75.0 100 1.32 2582‑0056 or 2584‑0412
5581‑350
5581‑350X12 		5501‑350
5501‑350X12 		3.50" 89.0 3.89" 99.0 200.0 PSI 75.0 100 1.37 2582‑0056 or 2584‑0412
5581‑375
5581‑375X12 		5501‑375 3.75" 95.0 4.14" 105.0 175.0 PSI 50.0 100 1.46 2582‑0060 or 2584‑0462
5581‑400
5581‑400X12 		5501‑400
5501‑400X12 		4.00" 102.0 4.39" 112.0 150.0 PSI 50.0 100 1.56 2582‑0064 or 2584‑0462
5581‑450
5581‑450X12 		5501‑450 4.50" 114.0 4.89" 124.0 150.0 PSI — — 1.76 2582‑0072 or 2584‑0512
5581‑500
5581‑500X12 		5501‑500 5.00" 127.0 5.39" 137.0 125.0 PSI — — 1.95 2584‑0562
5581‑550
5581‑550X12 		5501‑550 5.50" 140.0 5.89" 150.0 100.0 PSI — — 2.16 2584‑0612

Pairs With

Flexfab 2582-0016 Lined Worm Gear Clamp, 0.75"–1.00" ID, 300 SS, 10 Per Box Flexfab 2582-0016 Lined Worm Gear Clamp The matching half for this connection. Most buyers need both. €17,95
FLEXFAB

Industrial silicone hose engineered for heater, coolant, and high temperature service. Genuine Flexfab product with correct part numbers and specifications.

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