Best Acrylic Boat Windows and Windshields (2026)

Acrylic is the default glazing on small and mid-size boats for good reasons. It weighs half what glass does, it takes an impact that would shatter plate glass, it does not yellow in the sun, and it can be cut, drilled, and bent into a wraparound windshield with a heat gun and a jig. The thing it does not do well is resist scratches, which is why plastics distributors push hard-coated grades at boat owners. Read the fifth pick before you pay for one.

Buying acrylic for a boat is different from buying an RV window. There is no single "boat window" product. Depending on what broke, you need a pattern-matched windshield, a complete portlight, a bare replacement lens, or a sheet cut to a shape you draw. This guide covers the best source for each.

Our picks at a glance

How we evaluated

We have not fabricated windows from each of these suppliers. Rankings come from published product specifications, supplier catalogs, and owner reports on sailing and fishing forums, weighed on:

• Fit. A windshield made from the original mold fits. One made from a tracing might.
• Material grade. Standard, impact-modified, or abrasion-resistant acrylic, and whether the supplier tells you which.
• Tint options. Clear, smoke, bronze, and opaque matter more on a boat than a house.
• Ordering friction. Online cart versus phone quote versus mailing your old part.
• Price for the job. Including edge finishing, which is where DIY sheet jobs go wrong.

Prices are as listed in September 2026 and move with sheet stock.

1. UPD Plastics Boat Windshields

Best for Replacement Windshields. UPD Plastics in Davie, Florida has been making boat windshields since 1975 and holds more than 3,000 patterns covering roughly 100 manufacturers, from AB Inflatables and Actioncraft through Albin to Tiara. If your center console or runabout came from a production yard, the odds are good the mold is on their shelf. For anything that is not, they 3D-digitize the old shield or the deck and build a mold, usually without a tooling charge.

Windshields come in a choice of acrylic thicknesses and tints. Pricing is by quote through their online form rather than a cart, which is the one drawback. Returns on stock, uninstalled shields are free within 30 days; custom and installed pieces are excluded.

Request a quote from UPD Plastics

2. Specialty Marine Boston Whaler Windshields

Best Off-the-Shelf. If you own a classic 17-foot Montauk from 1977 to 2002 or an Outrage 18 to 25 from 1978 to 1992, Specialty Marine stocks the acrylic windshield in clear, bronze tint, or blue smoke, starting at $268. You add it to a cart and it ships. No quote, no template, no waiting for a mold.

That narrow model coverage is the whole limitation. For anything else, Specialty Marine sends you to UPD Plastics. It earns its place here because Whalers of that era are everywhere, the windshields crack, and this is the fastest fix.

Shop Specialty Marine windshields

3. Bomar and Lewmar Acrylic Portlights

Best Portlights and Hatch Lenses. Most production sailboats and cruisers carry portlights and deck hatches from Bomar or Lewmar, with acrylic lenses in an aluminum, stainless, or molded frame (Bomar's 100 Series cast hatches are the exception, with polycarbonate lenses). When a lens crazes or cracks, you have two routes. Our full Lewmar and Bomar review covers thickness, warranty, and the re-lens job.

The first is a complete new portlight. Great Lakes Skipper lists Bomar fixed-lens portlights from about $110 for a 6.5-by-16.75-inch unit to about $240 for an 18-by-8.5-inch smoke-lens port, with opening portlights with screens in between. Swapping the whole unit avoids the tedious job of cleaning old sealant out of a frame.

The second is a replacement lens. Every Lewmar hatch and portlight made after July 2007 has a lens code stamped in the acrylic, between the right-hand handle and the edge on hatches, under the logo on portlights. Lewmar's online identifier turns that code into the right spare part, and the hatch kits arrive with the seal and handles already fitted, at $132 to $394 from Defender. Lenses come in clear, smoke, and green. Older or unmarked units go to Lewmar tech support by email, and Bomar lenses are quoted by phone from Pompanette.

Browse portlights at Great Lakes Skipper or identify your Lewmar acrylic.

4. Boat Outfitters Cut-to-Size Marine Acrylic

Best Cut-to-Size. Boat Outfitters in Florida sells marine acrylic cut to your dimensions and pitches it for exactly the flat jobs a boat throws up: side windows, livewell lids, console doors, dash panels, and trim plates. Beyond clear, they offer several tint levels, opaque black for cutting glare on a dash, and two opaque whites chosen to match common gelcoats, so a replacement panel disappears into the boat.

The company would rather cut it for you than have you cut it at home, and they are right. A factory saw and a router give you a square, polished edge that will not craze. Pricing is by quote, and the page does not state which acrylic grade is used, so ask if you want impact-modified or hard-coated stock.

Order from Boat Outfitters

5. Cast Acrylic Sheet

Best DIY Material. If you are re-glazing a whole boat and have the tools, buy cast acrylic: ACRYLITE GP, Plexiglas G, or the cast stock any of the suppliers in our sheet supplier roundup will cut. It is what the sheet makers themselves recommend for boat windows. Polyvantis's own answer to a boat owner asking how to glaze a fiberglass hull is "cast sheet is recommended for windows in a marine (boat) application," bonded with DOWSIL 795 or GE SilPruf and framed with room to move.

Cast sheet does the three things a boat window needs and a hard coat cannot. It bends with heat into a wraparound windshield or a domed hatch lens. Its edges can be sanded and buffed to a polish that will not craze. And when a season of salt-and-wiper haze builds up, it sands and polishes back to clear with the method in our scratch repair guide. Sailboat owners on the Sailboat Owners forum used 1/4-inch for portlights and 1/2-inch for large deck hatches, reported around $600 in material for three hatches and six large portlights, and got quotes for cut-and-finished pieces from TAP Plastics, Interstate Plastics, and E-plastics of $440 to $800. Cast runs roughly $6 to $10 per square foot; our cast vs extruded explainer covers what the premium over extruded buys.

About the hard-coated sheet. We originally ranked ACRYLITE AR2, the abrasion-resistant sheet A&C Plastics markets as marine, in this slot. Then we read the maker's data sheet: Polyvantis rates it for indoor use with outdoor exposure "typically limited to three years," it cannot be thermoformed, line-bent, or flame-polished without the coating crazing, a scratch through the coat is permanent, there is no warranty, and it costs two to four times plain sheet. Our full AR2 review has the numbers. It is a fine product on a flat panel under a hardtop; it is not boat glazing.

Piedmont Plastics' PMG Ultra is the other grade to know: an impact-modified marine acrylic that resists cracking when screws go through it, with a ten-year warranty. It is the choice for panels that will be fastened rather than clamped.

Shop cast acrylic at ePlastics or PMG Ultra at Piedmont Plastics.

DIY notes from people who have done it

The Sailboat Owners forum thread on re-lensing hatches and portlights is the best practical guide we found. The consensus:

• Thickness. 1/4 inch for portlights, 1/2 inch for large deck hatches. One owner's original hatch lens measured 3/8.
• Acrylic over polycarbonate. Lexan is tougher but scratches faster, yellows sooner, and one owner found it let too much light through at night. Use acrylic unless the piece is small and takes real abuse.
• Edges. Flame-polished edges left stress in the sheet and led to crazing. Get edges milled or sanded and polished.
• Sealant. Dow 795 structural silicone for bonding lenses into frames. Butyl tape for bedding frames to deck, bought from a door-and-window supplier at a fraction of the marine-store price.
• Frames. Clean old butyl with green Scotch-Brite and MEK, not sandpaper, which cuts through the anodizing. Touch up bare aluminum with Alodine.

Buying checklist

• Start with the code. On a Lewmar hatch or port, the stamped code gets you an exact spare in one step.
• Match the tint to the old part. Bronze, smoke, and blue smoke are not interchangeable next to each other.
• Ask for the grade. Standard, impact-modified, or AR-coated. If the supplier cannot say, assume standard.
• Let the supplier cut it. A factory edge is worth the money on a windshield or hatch.
• Allow for expansion. Acrylic moves eight times more than glass with temperature. Oversize the holes and use a flexible sealant, never a rigid bed.
• Clean it like acrylic. Fresh water, a soft cloth, a plastic-safe cleaner. Never dry-wipe salt off it.

Sources

• UPD Plastics
• Specialty Marine: Acrylic windshields
• Great Lakes Skipper: Bomar portlights and Defender: Lewmar standard portlight replacement lens
• Lewmar: Hatch and portlight identifier
• Boat Outfitters: Marine acrylic sheets
• Polyvantis knowledge base: adhesive for acrylic windows on a fiberglass boat (cast sheet recommended), Polyvantis: ACRYLITE Optical mar resistant TDS 1970D (PDF), A&C Plastics: abrasion-resistant marine acrylic, and Piedmont Plastics: PMG Ultra marine grade acrylic
• Sailboat Owners Forums: Replacing acrylic portlights and hatch lens
• Piedmont Plastics: Acrylic sheet for boat windshields