--- product_id: 439480481 title: "SeaStar Solutions HA5440H, HA5440 Hydraulic Steering Fluid, Gallon" brand: "seastar" price: "¥72889" currency: JPY in_stock: true reviews_count: 5 category: "Sea Star" url: https://www.desertcart.jp/products/439480481-seastar-solutions-ha5440h-ha5440-hydraulic-steering-fluid-gallon store_origin: JP region: Japan --- # Water emulsification additive for system longevity Proprietary additive package for peak performance Anti-corrosion & anti-rust protection SeaStar Solutions HA5440H, HA5440 Hydraulic Steering Fluid, Gallon **Brand:** seastar **Price:** ¥72889 **Availability:** ✅ In Stock ## Summary > 🛥️ Navigate with confidence—only the best fluid for your SeaStar system! ## Quick Answers - **What is this?** SeaStar Solutions HA5440H, HA5440 Hydraulic Steering Fluid, Gallon by seastar - **How much does it cost?** ¥72889 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/439480481-seastar-solutions-ha5440h-ha5440-hydraulic-steering-fluid-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 - • **Foam-Free Operation:** Special anti-foaming agents ensure consistent hydraulic pressure and prevent steering lag or failure. - • **Ultimate Corrosion Defense:** Advanced anti-rust and corrosion inhibitors protect your steering system from wear and tear, extending its lifespan. - • **Engineered for Precision Steering:** Validated and performance matched exclusively for SeaStar hydraulic systems to guarantee smooth, responsive control. - • **Viscosity Stability Under Pressure:** Viscosity stabilizers maintain fluid consistency across temperature changes, delivering reliable steering in all conditions. - • **Made in the USA with Trusted Quality:** Manufactured domestically with rigorous standards, ensuring premium quality and peace of mind. ## Overview SeaStar Solutions HA5440H Hydraulic Steering Fluid is a premium, USA-made hydraulic oil formulated with a proprietary blend of anti-foaming, anti-rust, antioxidant, and viscosity stabilizing additives. It is uniquely validated and performance matched for SeaStar hydraulic steering systems, ensuring optimal steering responsiveness, corrosion protection, and system longevity. This 1-gallon jug is the essential maintenance fluid for professional-grade marine hydraulic steering reliability. ## Description HA5440 Size: 1 Gallon Features: -Made in the USA-1 Quart-1 Gallon Review: Great Fluid. - Purchased this product to replace the fluid in my boats Power Purge JR so it has fresh fluid. Great value. Review: Quantité correct pour le prix par rapport au concessionnaire! - Pas encore utilisé pour le moment le ponton est en storage!!! ## 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 | | Brand | SeaStar | | Brand Name | SeaStar | | Container Type | Jug | | Customer Reviews | 4.8 out of 5 stars 140 Reviews | | Global Trade Identification Number | 00731957801098 | | Item Form | Oil | | Item Weight | 1.63 kg | | Item weight | 1.63 kg | | Liquid Volume | 1 Gallons | | Liquid volume | 1 Gallons | | Manufacturer | SeaStar | | Material | Oil | | Model Number | HA5440H | | Number of Items | 1 | | Package information | Jug | | Part Number | HA5440H | | Recommended Uses For Product | Hydraulic Oil | | Recommended uses for product | Hydraulic Oil | | Specific Uses For Product | Prevent Corrosion | | UPC | 731957801098 | | Unit Count | 128.0 Milliliters | ## Product Details - **Brand:** SeaStar - **Item Weight:** 3.6 Pounds - **Liquid Volume:** 1 Gallons - **Package Information:** Bottle - **Recommended Uses For Product:** Hydraulic Oil ## Images ![SeaStar Solutions HA5440H, HA5440 Hydraulic Steering Fluid, Gallon - Image 1](https://m.media-amazon.com/images/I/71Pjmas15vL.jpg) ![SeaStar Solutions HA5440H, HA5440 Hydraulic Steering Fluid, Gallon - Image 2](https://m.media-amazon.com/images/I/61qOohmmEgL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Fluid. *by T***D on 31 October 2025* Purchased this product to replace the fluid in my boats Power Purge JR so it has fresh fluid. Great value. ### ⭐⭐⭐⭐⭐ Quantité correct pour le prix par rapport au concessionnaire! *by S***. on 30 December 2023* Pas encore utilisé pour le moment le ponton est en storage!!! ### ⭐⭐⭐⭐⭐ Best and cheapest way to buy this is the 4 liter size. *by S***I on 22 April 2024* everything was as expected. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/439480481-seastar-solutions-ha5440h-ha5440-hydraulic-steering-fluid-gallon](https://www.desertcart.jp/products/439480481-seastar-solutions-ha5440h-ha5440-hydraulic-steering-fluid-gallon) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-07-16*