Seastar Hydraulic Steering Fluid, Quart

DOMETIC Seastar Hydraulic Steering Fluid, Quart

Keep your hydraulic steering system performing like new with DOMETIC SeaStar Hydraulic Steering Fluid. Engineered specifically for SeaStar, SeaStar Pro, BayStar, BayStar Pro, and Hynautic steering systems, this premium fluid is the only steering fluid approved by SeaStar Solutions for use in its systems — using anything else can void your warranty and accelerate wear on rams, hoses, and helm pumps.

Formulated to meet Military Specification MIL-PRF-5606H, this fluid combines corrosion and rust inhibitors, anti-wear agents, viscosity stabilizers, and anti-foaming additives into a single high-performance blend. The result is smoother, more consistent steering response across a wide range of temperatures, reduced internal contamination, and a longer service life for every component in your steering system. Water emulsification additives also help minimize the moisture buildup that leads to internal corrosion and steering stiffness over time. Compatible with outboard, sterndrive (I/O), and inboard steering setups, this quart bottle is sized for routine top-offs, fluid changes, and system bleeding during maintenance or winterization.

Key Features

• Only hydraulic steering fluid approved by SeaStar Solutions for use in SeaStar, SeaStar Pro, BayStar, BayStar Pro, and Hynautic steering systems
• Meets Military Specification MIL-PRF-5606H for high-quality hydraulic fluid performance
• Corrosion and rust inhibitors plus anti-wear agents protect rams, seals, hoses, and helm pumps
• Viscosity stabilizers deliver consistent, predictable steering feel in both hot and cold conditions
• Anti-foaming agents purge trapped air for smoother, more responsive steering after fills or bleeds
• Water emulsification additives reduce moisture-related corrosion and internal damage
• Compatible with outboard, sterndrive, and inboard hydraulic steering systems
• Convenient 1-quart bottle, ideal for top-offs, fluid changes, and routine maintenance
• Backed by a two-year limited warranty

Specifications

• Manufacturer Part Number: HA5430H (supersedes earlier HA5430)
• Type: Hydraulic Steering Fluid
• Volume: 1 Quart (946 mL)
• Specification: Meets MIL-PRF-5606H
• Compatibility: SeaStar, SeaStar Pro, BayStar, BayStar Pro, Hynautic steering systems
• Warranty: Two Years Limited