Fiberglass is what most marinas use. A gelcoat finish shrugs off sun and salt for years, wipes clean and can be buffed back to a shine or patched after a knock. It costs two to three times as much as a polyethylene box of the same size.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Best Fiberglass Dock Boxes: Under 18 cu ft
- Taylor Made Stow 'n Go Standard Small#1 of 6Full review
The shortest of Taylor Made’s standard-height fiberglass boxes, for a short finger pier.
Amazon $901.08$901.0816.5 cu ftFiberglassGas supports - DoxBox Fiberglass Triangle#2 of 6Full review
A fiberglass corner box with vents and soft-close arms, for less than Taylor Made’s corner model.
Amazon $699$69913.1 cu ftFiberglassGas supports - Taylor Made Stow 'n Go Corner#3 of 6Full review
A fiberglass corner box that uses the dock gusset, space a rectangular box can’t. You pay for that fit.
Amazon $1,099.95$1,099.9513.9 cu ftFiberglassGas supports - Taylor Made Stow 'n Go Low-Profile Medium#4 of 6Full review
A low fiberglass box for a tight slip where a taller box would be in the way. It costs a lot for the space it gives.
Amazon $768.99$768.9910 cu ftFiberglassGas supports - DoxBox Fiberglass Rectangle 47"#5 of 6Full review
A tall, narrow fiberglass box that fits a slim strip of dock. The listing leaves out the lock and lid details.
Amazon $699$69914.8 cu ftFiberglass- - C&M Marine CM02 Dock Box 48"#6 of 6Full review
A small low-profile fiberglass box from a marina supplier. It costs more than the Taylor Made low-profile boxes and has fewer features.
Amazon $902$90210 cu ftFiberglassStay cables
Best Fiberglass Dock Boxes: 18 cu ft and up
- Taylor Made Stow 'n Go Top Seat Large#1 of 9Full review
The biggest Taylor Made box, with a seat top. The best fit when you want a dock bench and the most fiberglass storage.
Amazon $1,358.23$1,358.2335 cu ftFiberglassGas supports - RecPro Dock Box with Seat Top 71"#2 of 9Full review
A big fiberglass dock box with a seat top, from an RV and marine parts maker. Roomy, but no published warranty.
RecPro $1,449.95$1,449.9535.7 cu ftFiberglassGas supports - Taylor Made Stow 'n Go Deep Medium#3 of 9Full review
A 6 ft, extra-deep fiberglass box for cushions, tubes and skis. Good value per cubic foot for fiberglass.
Amazon $1,174.44$1,174.4429.2 cu ftFiberglassGas supports - Taylor Made Stow 'n Go Fisherman's XL#4 of 9Full review
The Standard XL with rod holders in the lid, for anglers who keep rods at the dock.
Lippert (Taylor Made) $1,302.95$1,302.9529 cu ftFiberglassGas supports - Taylor Made Stow 'n Go Standard Large#5 of 9Full review
A 7 ft fiberglass box. Check the price of the 95 in Standard XL first, which has sold for less.
Lippert (Taylor Made) $1,249.95$1,249.9526 cu ftFiberglassGas supports - Taylor Made Stow 'n Go Standard XL#6 of 9Full review
The longest standard Taylor Made box, for boaters with long gear and the dock length to fit it.
Amazon $1,610$1,61029 cu ftFiberglassGas supports - Taylor Made Stow 'n Go Standard Medium#7 of 9Full review
The common 6 ft fiberglass dock box, long enough for paddles and skis. A good default for a typical slip.
Amazon $1,128.02$1,128.0223 cu ftFiberglassGas supports - DoxBox Fiberglass Rectangle 70"#8 of 9Full review
A 6 ft fiberglass box with vents and soft-close arms for less than a Taylor Made of the same length.
Amazon $799$79919.7 cu ftFiberglassGas supports - Taylor Made Stow 'n Go Deep Small#9 of 9Full review
A short, tall and deep fiberglass box for bulky gear on a slip without much length.
Amazon $918.71$918.7118.7 cu ftFiberglassGas supports
