Seastar Hydraulic Steering Fluid
MaybeShoppers spend an estimated $3.9M a year here. But the top 5 brands take 99% of clicks, so Seastar Hydraulic Steering Fluid is a Maybe.
- Flapen Score
- 55 / 100Top 23% of 7,287 Automotive niches · +6 vs the category median of 4955
- Market size
- $3.9M/yr128K searches / yr
- 90-day growth
- +50.5%search demand this quarter
- Competition
- 66%top-5 click share · 6 brands · 69 sellers
Flapen Score
Seastar Hydraulic Steering Fluid against its category
The dotted line is the Automotive average. Past it, Seastar Hydraulic Steering Fluid is stronger. Inside it, weaker.
Market
The Seastar Hydraulic Steering Fluid market on Amazon at a glance
Shoppers on Amazon United States searched for Seastar Hydraulic Steering Fluid 128K times last year and spent an estimated $3.9M. The top 5 brands take 99% of clicks. Demand peaks in Apr–May–Jun–Jul. Flapen scores it 55 out of 100, a Maybe.
01 · Demand
An estimated 9.8% of those searches ended in a purchase.
Shoppers searched for this 128K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 9.8% of those searches ended in a purchase. Searches in the last 90 days moved +50.5% against the 90 days before. Searches, conversion and average price together put the market at an estimated $3.9M a year.
- Searches, last 12 months
- 128K
- Growth, 90 days vs prior 90
- +50.5%
- Conversion, latest week
- 9.8%
- Market size, estimated
- $3.9Ma year
- Peak month
- June3.4× the quietest month
- Top search term
- seastar hydraulic steering fluid37K searches a year
02 · Price
A sale here is worth $312.84.
Listings sell for $312.84 on average, from $15.50 to $1218.59. Amazon reports units sold in ranges. This niche sold 13K to 15K a year. The average listing sells 750 to 1,000 of them. At $312.84 that is $235K to $313K a year per listing.
- Average price
- $312.84above the $15 to $100 sweet spot
- Price range
- $15.50–$1218.59
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 13K–15K
- Units per listing a year
- 750–1,000
- Revenue per listing a year
- $235K–$313K
- Returns
- 1.1%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
54% of listings pay for placement with sponsored ads. 62% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #99 within Oils & Fluids. It carries 550 reviews at 4.67 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 54%
- Prime listings
- 62%
- Out of stock, average day
- 0.0%
- Average rank
- #99in Oils & Fluids
- Average rating
- 4.67 starsAmazon United States average 4.42 stars
- Average reviews
- 550per listing
- Listings tracked
- 13
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 61 months on average, so the names here are established.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 61 months
Products
Top Seastar Hydraulic Steering Fluid products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 9, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
SeaStar Solutions HA5430H SeaStar/BayStar Hydraulic Steering Fluid 1 Quart
- Price
- $32.16
- Rating
- 4.7/5
- Reviews
- 744
- Age
- 6y ago

Quicksilver 858075Q01 Power Trim and Steering Fluid 32 oz
- Price
- $16.06
- Rating
- 4.8/5
- Reviews
- 2,362
- Age
- 21y ago

Star Tron Premium Synthetic Blend Hydraulic Steering Fluid ISO 15 Marine-Grade
- Price
- $23.15
- Rating
- 4.8/5
- Reviews
- 90
- Age
- 1y ago

SeaStar Steering Fluid 1 Quart (Two Pack) Marine Prevent Corrosion 32 oz
- Price
- $57.04
- Rating
- 4.8/5
- Reviews
- 213
- Age
- 4y ago

Dometic SeaStar Baystar Hydraulic Steering Kit HK4200A-3
- Price
- $912.86
- Rating
- 4.6/5
- Reviews
- 614
- Age
- 11y ago
Trending
estimated 90-day click momentum
Quicksilver 858078Q01 Hydraulic Helm Steering Fluid - 32 Oz. Bottle
- Price
- $25.65
- Rating
- 4.8/5
- Reviews
- 513
- Age
- 21y ago

Dometic SeaStar Hydraulic Steering Fluid HA5430H 1 Quart (Single Pack)
- Price
- $31.60
- Rating
- 4.8/5
- Reviews
- 41
- Age
- 4y ago

Star Tron Premium Synthetic Blend Hydraulic Steering Fluid ISO 15 Marine-Grade
- Price
- $23.15
- Rating
- 4.8/5
- Reviews
- 90
- Age
- 1y ago

STAR BRITE PRO Star Power Trim & Tilt Fluid - Super Premium All Purpose Hydraulic Fluid for Trim Tabs Power Tilt & Steering Systems - Anti-Wear Anti-Foam - Outboard & Stern Drive Systems (028532)
- Price
- $15.50
- Rating
- 4.8/5
- Reviews
- 1,676
- Age
- 21y ago

SeaStar Solutions HA5430H SeaStar/BayStar Hydraulic Steering Fluid 1 Quart
- Price
- $32.16
- Rating
- 4.7/5
- Reviews
- 744
- Age
- 6y ago
Newest
by launch date
E-cowlboy 300HP Replace for Seastar Outboard Steering Cylinder HC5345-3 300 HP Front Mount Hydraulic Steering Cylinder Two-Way Lock Valve Front-Mount Aluminum Alloy Cylinder for 300 HP Boats
- Price
- $258.80
- Rating
- 4.3/5
- Reviews
- 13
- Age
- 1y ago

Star Tron Premium Synthetic Blend Hydraulic Steering Fluid ISO 15 Marine-Grade
- Price
- $23.15
- Rating
- 4.8/5
- Reviews
- 90
- Age
- 1y ago

SeaStar Steering Fluid 1 Quart (Two Pack) Marine Prevent Corrosion 32 oz
- Price
- $57.04
- Rating
- 4.8/5
- Reviews
- 213
- Age
- 4y ago

Dometic SeaStar Hydraulic Steering Fluid HA5430H 1 Quart (Single Pack)
- Price
- $31.60
- Rating
- 4.8/5
- Reviews
- 41
- Age
- 4y ago

HC5345 Seal Kit For SeaStar Hydraulic Steering Cylinder Seal Kit with Pin Wrench HS5157 compatible with HC5340 HC5341 HC5342 HC5343 HC5344 HC5345 HC6750 HC6751
- Price
- $19.54
- Rating
- 4.4/5
- Reviews
- 625
- Age
- 5y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 66% of clicks. Leaders hold, but buyers still shop past them.
Brands
6 falling
Sellers
69
Est. top-5 brand share
99%
Top 20: 100%
Est. top-5 click share
66%
Top 20: 100%
Open market
0%
- SeaStar54%
- Quicksilver20%
- STAR BRITE16%
- Dometic SeaStar7%
- E-cowlboy2%
- Danti1%
Demand
Seastar Hydraulic Steering Fluid search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 3.4×
Search terms
Top Seastar Hydraulic Steering Fluid search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- seastar hydraulic steering fluid37K/yr
- seastar hydraulic steering kit26K/yr
- seastar hydraulic steering18K/yr
- sea star steering hydraulic fluid9K/yr
- marine hydraulic steering fluid8K/yr
- seastar7K/yr
- hydraulic steering fluid5K/yr
- boat hydraulic steering fluid3K/yr
- sea star hydraulic steering fluid3K/yr
- hydraulic steering fluid for boats3K/yr
Reviews and returns
What reviews say buyers love and hate about Seastar Hydraulic Steering Fluid
We read the reviews and the return reasons for every product selling here.
“Leaks from the container”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
16 topics
Keep looking
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Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Seastar Hydraulic Steering Fluid questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









