---
product_id: 4601313
title: "Dometic SeaStar Hydraulic Steering Fluid, HA5440H, 1 Gallon"
brand: "seastar"
price: "€ 244.23"
currency: EUR
in_stock: true
reviews_count: 8
category: "Sea Star"
url: https://www.desertcart.sk/products/4601313-dometic-seastar-hydraulic-steering-fluid-ha5440h-1-gallon
store_origin: SK
region: Slovakia
---

# Water emulsification additive Proprietary additive formula Anti-corrosion & anti-rust agents Dometic SeaStar Hydraulic Steering Fluid, HA5440H, 1 Gallon

**Brand:** seastar
**Price:** € 244.23
**Availability:** ✅ In Stock

## Summary

> 🛥️ Navigate with confidence—only the best fluid fuels your SeaStar steering!

## Quick Answers

- **What is this?** Dometic SeaStar Hydraulic Steering Fluid, HA5440H, 1 Gallon by seastar
- **How much does it cost?** € 244.23 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/4601313-dometic-seastar-hydraulic-steering-fluid-ha5440h-1-gallon)

## Best For

- seastar enthusiasts

## Why This Product

- Trusted seastar brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Advanced Protection Formula:** Includes anti-foaming, anti-rust, and corrosion inhibitors to extend system life and reliability.
- • **Seamless System Maintenance:** Compatible with SeaStar’s hydraulic filler kit for clean, efficient bleeding and fluid replacement.
- • **Engineered for Peak Performance:** Validated and matched exclusively for SeaStar hydraulic steering systems to ensure flawless control and safety.
- • **Viscosity Stability Under Pressure:** Viscosity stabilizers maintain fluid consistency for smooth steering in all conditions.
- • **Made in the USA with Quality Assurance:** Crafted domestically with a limited warranty backing your investment.

## Overview

SeaStar Hydraulic Steering Fluid HA5440H is a premium 1-gallon hydraulic oil engineered with a proprietary additive package that prevents foaming, rust, and corrosion while stabilizing viscosity. Validated exclusively for SeaStar hydraulic steering systems, it ensures optimal performance and safety. Made in the USA and backed by a limited warranty, this fluid is essential for maintaining smooth, reliable steering on your vessel.

## Description

HA5440 Size: 1 Gallon Features: -Made in the USA.-1 Quart.-1 Gallon.

Review: Good quality and value - Works perfectly with my steering system
Review: Great Fluid. - Purchased this product to replace the fluid in my boats Power Purge JR so it has fresh fluid. Great value.

## Features

- SeaStar Hydraulic Steering Fluid is engineered with a proprietary additive package which contains anti-foaming and anti-rusting agents, anti-oxidants, viscosity stabilizers, corrosion inhibitors, wear additives and a water emulsification additive
- SeaStar Hydraulic Steering Fluid is the ONLY steering fluid which is Validated and Performance Matched to ensure the optimum performance and safety of SeaStar Solutions Hydraulic Steering Systems
- NOTE: There is no difference in the formulation of HA5440 and HA5440H. This is a part number change ONLY and does not affect anything else
- SeaStar Solutions offers a hydraulic filler kit (part # HA5458) which allows for a clean bleed of a hydraulic steering system when used properly
- Due to recent upgrades in SeaStar Solutions' Steering System components, SeaStar Solutions recommends using ONLY SeaStar Steering Fluid in their hydraulic steering systems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000FQ7NOK |
| Best Sellers Rank | #202,500 in Automotive ( See Top 100 in Automotive ) #53 in Power Steering Fluids |
| Brand | SeaStar |
| Brand Name | SeaStar |
| Container Type | Bottle |
| Customer Reviews | 4.6 out of 5 stars 143 Reviews |
| Global Trade Identification Number | 00731957801098 |
| Included Components | SeaStar Hydraulic Oil, 4 Liter - 1 Gallon |
| Item Form | Liquid |
| Item Type Name | SeaStar Hydraulic Oil, 4 Liter - 1 Gallon |
| Item Weight | 3.6 Pounds |
| Liquid Volume | 1 Gallons |
| Manufacturer | SEASTAR SOLUTIONS |
| Package Information | Bottle |
| Recommended Uses For Product | Hydraulic Oil |
| UPC | 731957801098 |
| Unit Count | 128.0 Fluid Ounces |
| Warranty Description | limited warranty |

## Product Details

- **Brand:** SeaStar
- **Item Weight:** 3.6 Pounds
- **Liquid Volume:** 1 Gallons
- **Package Information:** Bottle
- **Recommended Uses For Product:** Hydraulic Oil

## Images

![Dometic SeaStar Hydraulic Steering Fluid, HA5440H, 1 Gallon - Image 1](https://m.media-amazon.com/images/I/71Pjmas15vL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality and value
*by J***R on February 21, 2024*

Works perfectly with my steering system

### ⭐⭐⭐⭐⭐ Great Fluid.
*by T***D on October 31, 2025*

Purchased this product to replace the fluid in my boats Power Purge JR so it has fresh fluid. Great value.

### ⭐⭐⭐⭐⭐ Great product
*by M***G on October 15, 2022*

My steering is like new.

## Frequently Bought Together

- Dometic SeaStar Hydraulic Steering Fluid, HA5440H, 1 Gallon
- HC5345 Seal Kit For SeaStar Hydraulic Steering Cylinder Seal Kit with Pin Wrench HS5157 compatible with HC5340, HC5341, HC5342, HC5343, HC5344, HC5345,HC6750, HC6751
- Marine Tech Tools Bleed Tube, Seastar Hydraulic Steering Bleed Kit, Fits Seastar Hydraulic Cylinders, Seastar Hydraulic Steering Fluid Bleeder Kit, Marine Tool Kit for Boats

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**Shop now:** [https://www.desertcart.sk/products/4601313-dometic-seastar-hydraulic-steering-fluid-ha5440h-1-gallon](https://www.desertcart.sk/products/4601313-dometic-seastar-hydraulic-steering-fluid-ha5440h-1-gallon)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-02*