Seafoam Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Sea Foam is the best-performing seafoam brand in July 2026, moving 5,300 units across 5 ASINs for 54.6% of Top 10 volume. STA-BIL follows with 2,000 units (20.6%), ahead of GUBARUN on 1,000 units (10.3%).

With 6 brands splitting the Top 10 and 85.6% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $21.59 to $34.82, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. On the growth side, B015T5Y8CG leads positive momentum with ▲ 100.0% MoM growth on 200 units, with B0CRVL7VN7 close behind at ▲ 100.0% MoM on 200 units.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.