Tecnoseal marine anodes are designed to protect underwater metal components from galvanic corrosion through sacrificial cathodic protection. The range includes zinc, aluminum, and magnesium anodes for different water conditions, including saltwater, brackish water, and freshwater applications. Tecnoseal anodes are available for hulls, propeller shafts, propellers, trim tabs, engines, sterndrives, and other submerged metal components. Correct selection of the anode material, size, and application helps protect valuable marine equipment and extend the service life of the vessel’s underwater metalwork.
|
1-2 weeks delivery time The Tecnoseal 00630FISH Series consists of suspended fish-shaped hang-on anodes supplied with a 6 m (19.65 ft) cable, available in Zinc 00630FISH, Aluminium 00630FISH-AL and Magnesium 00630FISH-MG versions. All three variants share the same dimensions of 237 mm length and 70 mm height. The Zinc version weighs 3.00 kg (6.61 lbs), the Aluminium version 1.18 kg (2.60 lbs), and the Magnesium version 0.76 kg (1.68 lbs).
|
$ 132.49
Type:
| ||
|
1-2 weeks delivery time Tecnoseal aluminium NACA-profile shaft collar sacrificial anodes, available in nine sizes for shafts from 19 to 35 mm, including metric and imperial shaft configurations. All models have a height of 25 mm, with outside diameters of Ø55 or Ø66 mm depending on size. The range covers shaft openings from 19 to 35 mm and aluminium anode weights from 0.07 to 0.12 kg. Select the required model according to shaft size, outside diameter and weight.
|
$ 17.88
Shaft Diameter:
Size:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal aluminium shaft collar sacrificial anodes for shaft installations, available in Limited Clearance, Medium Size and Large Size configurations. The range includes metric and imperial shaft sizes from 19 mm / 3/4" up to 140 mm, with collar heights from 18 to 40 mm, overall diameters from Ø61 to Ø225 mm and weights from 0.02 to 2.20 kg. Compact Limited Clearance versions cover shaft sizes from 19 mm / 3/4" through 50 mm, including 7/8", 1", 1-1/8", 1-1/4" and 1-1/2" options. Additional medium and large aluminium versions are available for 60, 70, 75, 100, 120 and 140 mm shafts. Select the required model according to shaft size, collar height, overall diameter and weight.
|
$ 14.28
Shaft Diameter:
Size:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal aluminium UK Type shaft sacrificial anodes for marine shaft installations, available in metric and imperial shaft configurations from 19 mm / 3/4" up to 50 mm. The range includes thirteen models with shaft openings from 19 to 50 mm, heights from 65 to 100 mm, overall diameters from Ø56 to Ø85 mm and aluminium anode weights from 0.22 to 0.952 kg. Imperial shaft options include 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-1/2" and 1-3/4". Bolts and nuts are not included. Select the required model according to shaft size, height, overall diameter and weight.
|
$ 51.71
Shaft Diameter:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal aluminium USA Type shaft sacrificial anodes for marine shaft installations, available in metric and imperial shaft sizes from 19 mm / 3/4" up to 76.20 mm / 3". The range includes compact models with 2 fastening holes and larger versions with 4 fastening holes. Depending on the model, weights range from 0.14 to 1.25 kg, heights from 51 to 102 mm and overall diameters from Ø54 to Ø122 mm. Available shaft sizes include 19, 25, 28, 30, 35, 40, 45, 48, 50 and 60 mm together with 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-1/2", 1-3/4", 2", 2-1/4", 2-1/2", 2-3/4" and 3" configurations. Bolts and nuts are available on request. Select the required version according to shaft size, fastening configuration, height, overall diameter and weight.
|
$ 21.73
Shaft Diameter:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal magnesium NACA-profile shaft collar sacrificial anodes, available in nine configurations for shaft sizes from 19 to 35 mm, including metric and imperial shaft dimensions. All models have a height of 25 mm, with outside diameters of Ø55 or Ø66 mm depending on size. Shaft openings range from 19 to 35 mm, while magnesium anode weights range from 0.06 to 0.10 kg. Select the required model according to shaft size, outside diameter, shaft opening and weight.
|
$ 21.14
Shaft Diameter:
Size:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal magnesium Limited Clearance shaft collar sacrificial anodes for shaft installations where a compact collar profile is required. The range includes fourteen models for metric and imperial shaft sizes from 19 mm / 3/4" up to 50 mm / 1-1/2", with weights from 0.05 to 0.15 kg. Available versions feature heights from 18 to 25 mm, overall diameters from Ø61 to Ø85 mm and internal shaft diameters from 19 to 50 mm. Metric versions are available for 20, 25, 30, 35, 40, 45, 48 and 50 mm shafts, together with 3/4", 7/8", 1", 1-1/8", 1-1/4" and 1-1/2" imperial configurations. Select the required model according to shaft size, overall diameter, collar height and weight.
|
$ 19.05
Shaft Diameter:
Size:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal magnesium Standard Type shaft sacrificial anodes for marine shaft installations, available for metric and imperial shaft sizes from 19 mm / 3/4" up to 80 mm. The range includes models with 2 fastening holes for shaft sizes from 19 mm through 2" / 50.8 mm, and larger models with 4 fastening holes for shafts from 55 to 80 mm. Depending on the model, anode height ranges from 56 to 110 mm, overall diameter from Ø58 to Ø128 mm and magnesium anode weight from 0.09 to 0.69 kg. Bolts and nuts are available on request. Select the required Tecnoseal model according to shaft diameter, overall dimensions, fastening-hole configuration and weight.
|
$ 27.12
Shaft Diameter:
Size:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal magnesium UK Type shaft sacrificial anodes for marine shaft installations, available in six metric and imperial shaft configurations from 19 mm / 3/4" up to 30 mm. All models have a height of 65 mm and an overall outside diameter of Ø56 mm, with shaft openings from 19 to 30 mm. The range includes 3/4", 7/8", 1" and 1-1/8" imperial versions together with 25 mm and 30 mm metric sizes, with listed magnesium anode weights from 0.01 to 0.18 kg. Bolts and nuts are not included. Select the required model according to shaft size, Ø1 opening and weight.
|
$ 63.03
Shaft Diameter:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal magnesium USA Type shaft sacrificial anodes for marine shaft installations, available for shaft sizes from 19 mm / 3/4" up to 60 mm and including both metric and imperial configurations. The range includes compact 2-fastening-hole models from 00500USAMG through 00514USAMG, plus the larger 00517USAMG version with 4 fastening holes. Depending on the model, anode height ranges from 51 to 102 mm, overall diameter from Ø54 to Ø107 mm and magnesium anode weight from 0.09 to 0.65 kg. Bolts and nuts are available on request. Select the required model according to shaft size, overall dimensions, fastening configuration and weight.
|
$ 27.12
Shaft Diameter:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal zinc NACA-profile shaft collar sacrificial anodes, available in nine sizes for shafts from 19 to 35 mm, including metric and imperial shaft configurations. All models have a height of 25 mm, with outside diameters of Ø55 or Ø66 mm depending on size. The range covers Ø1 shaft openings from 19 to 35 mm and zinc anode weights from 0.22 to 0.32 kg. Select the required model according to shaft diameter, outside diameter and weight.
|
$ 22.18
Shaft Diameter:
Size:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal zinc shaft collar sacrificial anodes available in Limited Clearance, Slim, Medium and Large Size configurations for shaft diameters from 19 mm / 3/4" up to 360 mm. The range includes metric and imperial shaft sizes, with collar heights from 18 to 60 mm, overall diameters from Ø61 to Ø511 mm and weights from 0.21 to 49.40 kg. Available models include compact collars for 19–50 mm shafts, medium-size versions for shafts up to 95 mm and large collars for shaft diameters from 100 to 360 mm. Select the required Tecnoseal model according to shaft diameter, overall collar diameter, height and weight.
|
$ 16.59
Shaft Diameter:
Size:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal zinc Standard Type shaft sacrificial anodes for marine shaft installations, available for shaft sizes from 19 mm / 3/4" up to 90 mm and including both metric and imperial configurations. The range includes models with 2 fastening holes for shaft sizes from 19 mm through 2" / 50.8 mm, and larger models with 4 fastening holes for shafts from 55 to 90 mm. Depending on the model, anode height ranges from 56 to 113 mm, overall diameter from Ø58 to Ø137 mm and weight from 0.41 to 3.65 kg. Bolts and nuts are available on request. Select the required model according to shaft diameter, overall dimensions, fastening-hole configuration and weight.
|
$ 30.72
Shaft Diameter:
Size:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal zinc Barrel Type shaft sacrificial anodes for marine shaft installations, manufactured with 4 fastening holes. The range includes nine models for shaft diameters from 95 to 130 mm, with anode weights from 5.10 to 15.20 kg. Depending on the model, heights range from 114 to 156 mm and overall diameters from Ø142 to Ø180 mm. Bolts and nuts are available on request. Select the required Tecnoseal model according to shaft diameter, anode height, overall diameter and weight.
|
$ 297.96
Shaft Diameter:
Size:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal zinc Light Type shaft sacrificial anodes for marine shaft installations, available in five metric and imperial shaft configurations from 19 mm / 3/4" to 28 mm. All models feature 2 fastening holes, a 40 mm height and Ø50 mm overall diameter, with shaft openings from 19 to 28 mm and weights from 0.22 to 0.31 kg. The range includes Tecnoseal 00500L for 19 mm / 3/4" shafts, 00501L for 7/8" shafts, 00502L for 25 mm shafts, 00503L for 1" shafts and 00504L for 28 mm shafts. Bolts and nuts are available on request. Select the required model according to shaft diameter and anode weight.
|
$ 29.17
Shaft Diameter:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal zinc UK Type shaft sacrificial anodes for marine shaft installations, available in metric and imperial shaft configurations from 19 mm / 3/4" up to 50 mm. The range includes thirteen models with shaft openings from 19 to 50 mm, heights from 65 to 100 mm, overall diameters from Ø56 to Ø85 mm and weights from 0.56 to 2.47 kg. Available imperial configurations include 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-1/2" and 1-3/4". Bolts and nuts are not included. Select the required Tecnoseal model according to shaft size, height, overall diameter and weight.
|
$ 71.93
Shaft Diameter:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal zinc USA Type shaft sacrificial anodes for marine shaft installations, available for shaft sizes from 19 mm / 3/4" up to 6-1/2" / 165 mm. The range includes metric and imperial shaft configurations with 2 fastening holes on models up to 00514USA and 4 fastening holes on larger models from 00516USA onward. Depending on model, anode height ranges from 51 to 102 mm, overall diameter from Ø54 to Ø209 mm and weight from 0.36 to 6.35 kg. USA reference designations include X-1 to X-22 and D-series references for selected metric sizes. Bolts and nuts are available on request. Select the required version according to shaft size, Ø1 opening, overall dimensions, fastening-hole configuration and weight.
|
$ 37.59
Shaft Diameter:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal aluminium Radice conical propeller sacrificial anodes for fixed pitch propeller installations, supplied as replacement anodes only. The range includes ten models for shaft sizes from Ø22–25 mm up to Ø110 mm, with weights from 0.05 to 3.00 kg. Available versions range from 39 to 134 mm in height and from Ø33 to Ø160 mm in overall diameter, with individual Ø1, Ø2 and Ø3 dimensions for replacement matching. Select the required Tecnoseal model according to shaft size, anode dimensions and weight.
|
$ 5.43
Shaft Diameter:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal aluminium Radice conical propeller sacrificial anodes for fixed pitch propeller installations, supplied complete with a brass plug. The range includes nine standard brass plug models and selected non-standard configurations for shaft sizes from Ø22–25 mm up to Ø70/100 mm. Available versions range from 20 to 46 mm in h dimension, 18 to 46 mm in h1 dimension and from Ø37 to Ø100 mm in overall diameter, with weights from 0.11 to 4.52 kg. Standard models use the corresponding Radice brass plug thread, while the non-standard versions include Tecnoseal 00410-2AL with 18x1.5 thread, 00413-1AL with 26x2 thread and 00414-2AL with 30x2 thread. Select the required version according to shaft size, plug type, thread size, dimensions and weight.
|
$ 57.86
Type:
Shaft Diameter:
Item:
| ||
|
1-2 weeks delivery time Tecnoseal aluminium Radice hexagonal-type propeller sacrificial anodes for fixed pitch propeller installations, supplied as replacement anodes only. The range includes nine models for shaft sizes from Ø22–25 mm up to Ø70/100 mm, with weights from 0.05 to 1.01 kg. Available versions range from 39 to 98 mm in height and from Ø33 to Ø97 mm in overall diameter, with individual c, Ø1 and Ø2 dimensions for replacement matching. Select the required model according to shaft size, anode dimensions and weight.
|
$ 6.74
Shaft Diameter:
Item:
| ||
What is the purpose of using Tecnoseal anodes on a boat?
Tecnoseal anodes provide sacrificial cathodic protection for underwater metal components by corroding preferentially instead of the more valuable parts of the vessel. They can be used to protect areas such as hull fittings, propeller shafts, propellers, trim tabs, engines, sterndrives, and other submerged metal components.
Correct anode selection and installation help reduce galvanic corrosion and extend the service life of the protected equipment.
What are the main differences between zinc, aluminum, and magnesium Tecnoseal anodes?
The three materials differ mainly in their electrochemical activity and the water conditions for which they are suited. Zinc anodes are traditionally used in saltwater, while aluminum anodes are suitable for saltwater and brackish water and can provide high protective capacity for their weight. Magnesium anodes are more active and are primarily intended for freshwater applications.
The correct material should be selected according to the vessel, protected metal, and operating environment, as using the wrong anode material can reduce the effectiveness of the cathodic protection system.
How do Tecnoseal anodes differ for various parts of a boat?
Tecnoseal produces anodes in different shapes, sizes, and mounting configurations to match specific marine components. Anodes for shafts, propellers, trim tabs, engines, sterndrives, and hull installations are designed to fit the geometry and mounting requirements of the equipment they protect.
Choosing the correct anode depends on the application, dimensions, mounting method, material, and compatibility with the original equipment or existing installation.
How can I identify the correct Tecnoseal replacement anode?
The most reliable method is to use the Tecnoseal part number or the original OEM reference of the anode being replaced. If these are unavailable, dimensions, mounting-hole spacing, shape, weight, material, and the make and model of the protected equipment can help identify the correct replacement.
Compatibility should always be confirmed before installation, especially when several visually similar anodes are available for the same engine, drive, or propulsion system.