G10 fiberglass boards are made of a special glass epoxy laminate that has extremely high strength. G10 fiberglass is used in marine applications due to its superior strength, moisture resistance, and excellent electrical and fire insulation.
Fiberglass boards make excellent non-corrosive backing plates for high load deck hardware or bond to engine room bulkheads to hold mounting brackets. G10 boards are sold in 1/4 and 1/2 inch thickness.
G-10 is similar in strength and density to starboard, but because it is formed from epoxy resin, it bonds easily using most two-part epoxies.
Available in Backing Plate sizes and full sheets.
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FR-4 Grade fire resistance
Low moisture absorption
Rated to 285 F continuous operating temperature, will not melt at high heat
High impact strength
High tensile strength
High dielectric strength
High flex strength and dimensional stability
Would 1 1/4 x 2x3 at each end of a grab handle be strong enough?
We can not answer that without more details of your application. Please call one of our techs at (800) 497-0010 to provide some more details and help answer this question more accurately.
JD Tech Associate
Can G 10 board be used as backing plates on the underside of a swim step where there will be regular contact with salt water. Purpose is as backing plates for davit hardware mounted on swim step. Am looking for alternative to aluminum plates.
New to powerboats
G10 will work great in this application. The problem will be the stainless hardware.
Good idea! You can thread the G 10 and use that as a additional strength. Add a nylon lock nut for insurance but you have to make sure the bolt does not spin.Good luck. BruceSent from my iPhone
G10 plates work out great as backing plates for hardware, and it will not corrode from oxidation either.
JD Tech Associate
Yes, absolutely. Just be sure to use appropriate hardware and sealant.
Does G10 need to be UV protected. If so, what kind of paint would be recommended?
G10 plate should be painted with a 1- or 2-component urethane system that has UV protection. There are a lot of different paints that would work, it depends on what the customer is looking to get out of the paint/application.
JD Tech Associate
I have 3/8 inch teak strips behind the windshield. They were mounted on marine plywood. The plywood delaminated. Could I use this material to mount the teak, have it stick, and not have it rot?
Yes you can epoxy it in, and attach the teak strips to it, it won't rot.
JD Tech Team
i need to use 1/2" marine plywood as a backing material. What thickness of G-10 would be equivalent?
It's hard to say without knowing the specific application. For example, I use 1/4" G-10 plate as a substitute for 1/8" stainless steel plate or 3/16" aluminum as a backing plate for highly-loaded deck hardware such as cleats or stanchions. G-10 has dramatically different properties than plywood--better in compression, stiffer, etc.--so the substitution formula is hard to know.
nick the boatbuilder nick the boatbuilde
Will a foot wide strip of 1/4" G10 bend 1" over 3'? Or is G10 too stiff?
I would be very surprised if it would bend, even more surprised if it would stay bent.
No. Way to stiff
hi people. im looking for the name of a product. that is like some kind of styrofoam fiber board. That you can form and apply resin or glass to acheve its hardend??????
viktor Last Name
I bought this as a backing "plate" for cleats etc. It is extremely hard with little or no compression. I have been able to cut/saw it and sand it. However I think it would be a difficult product to "shape".
You are looking for divinicell or core foam.G-10 is a mutilayered fiberglass that is cured, and can be used for backing plates or structurallly
Divinycell issued for coring hulls. Very strong, can be shaped easily. Coosa Board is much lighter than G10 and is used for flat structural elements like coring a deck. It can be sanded to a curve, but otherwise is rigid.
Not sure what that might be, but this is not it. This is rock hard and inflexible from the get-go.
G 10 is rigid and very strong. It is not "formable". I used it as backing plate to re enforce the hull to mount dinghy davits.
What is the machinability of this material. Milling and drilling to be specific?
I used the board as a backing plate for deck hardware. I used thickened epoxy to glue it in place and covered it with fiberglass cloth. I did not have to machine it but drilling through it worked just fine with a normal drill bit.
Jamestown does carry Â¥Ã‹_Â¥Ã‹__" I now see.
It mills beautifully, drilling is easy. The only issue to be aware of is the dust. Wear masks and avoid contact with skin. You will itch for days if you get the dust on your person. Particularly in summer or if you are sweating, keep it off your skin. For cutting, I have found that bi-metal blades work best. It will blunt everything else pretty quickly. Use a slow feed rate.
Easily drilled and I also used a router on the edges so I assume that milling should not be an issue either.
Machinability of this material is excellent. It work well for milling and drilling. It will dull bits as it s extremely hard.
I am no expert, and not even a professional. I used a diamond/carbide table saw blade to cut it. For thicker pieces, I cut it in several places. I bought the saw blade online for about half a c note. I just bought two more as I've already wore it out, (I cut some that was Â¥Ã‹_Â¥Ã‹__" that I bought from another source as Jamestown didn't have that size). Same thing on drill bits, use carbide.Anything designed to cut metal should work. It is hard on equipment.It is also hard on you! Wear a Tyvek suit, full face mask respirator with proper filters, and don't eat or drink while working with it. Shower immediately, taking your clothes off outside, shaking them out and straight into the wash.The dust from it must be harmful, as its ground glass after all, not to mention the chemicals. It's worth it though. It is an awesome material!Good luck!
Drilling is about the same as drilling through any fiberglass, faster and easier than aluminum, but slower than wood.I've only drilled holes but I'm sure cutting is the same, just make sure your bits or blade is sharp.
Drilling and sawing just like any hard, hard plastic. It's possible with sharp tools, but it will take it's toll on regular non-carbide tipped bits and blades. I imagine milling is the same way.
As an epoxy based material it is easily machined and I have seen it tapped and threaded as well.I personally have not done so however, and have used it extensively as backing plates for deck hardware, whereby it is through bolted and to make up brackets and platforms for pumps and ER equipment. In one case I used a ss threaded insert bedded into the G10 with West Flex instead of a bolt.
Easy to work with. Had no problems cutting, sanding or drilling.
do you have 5/8" think G10 board 36" x 48"?
I used 2" by 4" pieces as backer plates and they worked just fine. I am sure you have different use for it however.
The thickest we have is 1/2".
can i use this for the floor? i have a 20ft glass pro.
The G10 is extremely strong and rigid. It is not very flexible. Basically think of a sheet of glass that won't break or shatter. It is a little hard to cut and drill, but for the right application it is amazing stuff. Also quite heavy for its size, and slick. It is easy to glass in place. I used it for smaller structural pieces and backing plates.
The stuff is very strong. I'm no expert but I think that it would work very well as a floor.
I used pre-cut pieces as backing plates for decj stanchion bases. I assume you asking about replacing a marine plywood floor with G10 - yes, it will last forever but is expensive and dificlut to cut.
I purchased two small pieces of the material to use as a support for hiking straps to pass under on a small open sailboat. The material is very strong, but I could not comment on using it for a floor.
I used 1/4" G10 to repair the fore-triangle deck of my sailboat. Used to be 1/2" plywood cored. So yes, I would say you can use it for the floor/deck of a boat.It is heavy. It can not be bent to a curve/shape.Coosa Board is a lighter product. If you are replacing the core of a floor/deck, and you are going to do fiberglass layup on top and bottom, Coosa may be a better answer.
Yes, but it will be an expensive solution, depending on how big the floor is. It may require additional reinforcement to make it stiff enough, depending on the configuration and span of area. Remember that this is an epoxy laminate, so you will need to use epoxy resins and compatible reinforcement when bonding it into a fiberglass laminate boat hull.
nick the boatbuilder nick the boatbuilde
Bought this for a fellow sailor so don't know his experience
Quick delivery, product as advertised
Reasonable price, fast delivery.
perfect piece to have
Needed to make a frame for bilge vents. Replacement vents are a different width. The frame will be a type of "picture frame" I will fit into place around the existing cut out in the hull. I will recess the frame into the hull and epoxy into place.
I rebuilt the plumbing for my boat holding tank. I used the fiberglass board and PVC pipe instead of bronze plate and copper pipe. Should last my life!Cutting and drilling G10 is like cutting sheet metal. Easy.
San Francisco, California
Purchased 2 sq feet of 1/4" G10 fiberglass boards to use as thermal insulation between steel parts. The panels were cut into smaller pieces and isolated mating steel parts where mechanically joined.G10 has excellent thermal resistance with 1/4" offering as much as 1" plywood AND unlike wood has excellent compression qualities. The product was packaged better than a Faberge egg. I thought it was as fragile as glass and started to worry that I might have spent good money on an unusable product. Not so, it's tough as nails and machines beautifully. Very happy with product and might be ordering another soon. Highly recommended.
Orange County CA
Used this to fabricate a mounting plate for my transducer, which I then adhered to the transom with 3M4200 (to avoid drilling). Starboard was to pricey for the small amount I needed. Very easy to work with.
Good product for small repairs
I removed a leaking cockpit drain which emptied into the centerboard trunk of my catboat. I used this product to fill the floor cutout where the old drain was located. Worked very well, created a very strong floor repair and interfaced well with fibreglass mat.
Lake Hopatcong NJ
Perfect Material for backing plates
We made thru-hull backing plates and upper rudder bearing supports from this G-10 sheet. It fabricates easily, is durable and strong, and will last the life of the boat. As always, our transaction with Jamestown Distributors was easy and the product showed up on time and as represented. We will order this product again from Jamestown Distributors in the future.
Fort Lauderdale FL
Great product/fast delivery
Backer for mid ship cleat on Catalina 22
Worked beautifully as a temporary patch to cover a soft spot on the floor of my fishing boat.
Elk Mound, WI
Rugged and easy to work with
Used the panels to build a bulletproof icebox. The last icebox aboard had failed after years of ice blocks being dropped from some height...it won't happen to this one!