Marine-Tex is a high strength epoxy putty that hardens like steel and is sandable like wood. Use it to repair holes, cracks, dents, worn out surfaces and damaged substrates on your boat and beyond. This unique putty bonds and fuses ceramics, fiberglass, plastics, wood, metals, ferro-cement and porcelain.
Marine Tex epoxy is impervious to oil, fuel, grease, brine and detergents. Commonly used for minor fiberglass gelcoat repairs, tt is unaffected by temperatures from -60 F to 300 F. It can be sanded, drilled, sawed, threaded and painted. Non-magnetic, non-rusting and non-corrosive.
Note: Not suitable for use with polyethylene and polypropylene based plastics. Poor adhesion will result if surfaces are unclean, oily, greasy, or generally contaminated.
Choose stiffer Gray Marine-Tex for machinery and metal repairs, as White is better for fiberglass repairs.
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Frequently Asked Questions and additional information
Underwater application: While Marine Tex putty can be applied underwater, it is likely to be washed away before it can cure. FlexSet is better for underwater applications due to its denser consistency. To test underwater application, mix the epoxy above water, and deposit on wax paper or plastic wrap. Slide the wax paper or plastic wrap onto the palm of your hand with epoxy facing up.
Take it below the water line and apply to surface. Be careful not to smack or pancake the product onto the surface, this will trap water under the epoxy. Instead, roll the epoxy onto the repair to push water out of the way. Leave wax paper/plastic wrap on the repair while full cure takes place for best results.
Below-the-water-line applications: It can be used for repairing gouges or holes located below the water-line. Once cured, Marine-Tex is impervious to water and many chemicals. The key is to apply in dry conditions, such as with the boat out of the water. Since putties will go only where they are placed, be sure that the Marine Tex has completely encapsulated the problem area. It is a good idea to sand the perimeter of the repair before application for maximum adhesion.
Will it cure in cold weather? Epoxies need heat in order to cure. If your application temperature is not at least 60F you must apply heat to the area before, during, and after the application in order for it to cure. ITW recommends you place a shop lamp approximately 12" - 18" in front of the application. The lamp will provide heat at a constant rate, so that the material's temperature is always constant. Do not apply a heat gun or hair dryer to the area, these types of heat will heat the area too much.
Once fully cured, it may be drilled and tapped once. Do not attempt until full cure has occurred. Marine Tex is fuel resistant (gasoline, diesel) and is suitable for repairs where fuel exposure is possible. It can also be used for gelcoat repairs. We are sometimes asked if it suitable for potable water system repairs, and the answer is no.
Temperature range limitations: While Marine Tex can safely tolerate 250F constant temperatures in a dry environment (with spikes to 325F), limits also depend on pressure and conditions.
How high of a temperature can Marine-Tex withstand? Temperature limits depend on pressure and conditions. Up to 250F constant temperature in a dry environment, with spikes up to 300-325F.
Adding Pigments: White Marine-Tex can be pigmented. No pure color will be achieved by adding pigments. (We recommend epoxy-friendly pigments, like Fibre-Glass Evercoat's.) Do not use more than 5% pigment per total volume of epoxy.
Gray Marine-Tex does not contain metal fillers. Both Gray and White have two year shelf lives in closed containers at moderate temperatures. Wen working with this epoxy putty, expect a pot life of approximately 30 minutes at 72 F. Do *not* use any thinners under any circumstances, as thinners change the physical properties.
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Is it necessary to apply this epoxy to both surfaces to be bonded or just one of the two?
This is a thick putty epoxy not for gluing two surfaces. Use it to repair holes, cracks, dents, worn out surfaces and damaged substrates.
JD Tech Team
How is the Marine Tex surface prepped before applying anti-fouling bottom paint ?
Sand, and clean with acetone.
JD Tech Team
I have some damage on bottom of keel from striking a rock. About 8-10 sq. inches of gelcoat gone and some damage to fiberglass, about an inch deep at its worst. Is this the best product to use for the repair and, if so, should I/can I put gelcoat over it after it is faired? Would it be better to use epoxy and laminate. I can send photo if that would help answer. Thanks. Peter Shelley
You can use marine-tex for the keel repair. No need to apply gel coat over it, just bottom paint.
JD Tech Team
Will this product work well for building top of an engine block. We have a low area on the engine block? It is a ntc 350 cummins engine.
no I wouldnt use it for this
If the low area is on the outside of the block around the coolant passages and not in an area subject to the heat and compression of combustion, the gray Marinetex should work.
RICHARD J. ROBBINS
I chipped my wife's favorite coffee mug, around the top edge, leaving a somewhat jagged break. I have experienced Marine-Tex in the past on my boat and thought perhaps this will do for her mug as well. Of course it's clean and dry now, and will be subjected to normal dish-washing loads. Do you think it would work?
I would not use this product for anything that touches food or drink as it is chemical based.
Absolutely. You can repair it and let it harden, then sand it to make it perfect
Can you also supply J.B.Weld epoxy?RegardsIan Poole
Sorry, we don't carry JB Weld.
How good is this product on applications to wood (Cedar)?
Hi Steven B.Used Git Rot and Thixo, now for fairing I'll get Marine Tex.Thanks for responding.Roy
Hi John, Thanks for response. Roy
Marine-Tex will give you a strong, water proof repair on just about any surface material. Try it out on a small job before you commit to a big repair.
One of the best products for wood that has been compromised as a result of water Penetration . Also Used in concert with "get rot" !
Roy, I really not sure, I used in to patch fiberglass and it worked very well. Best of luck!
how long after repair(under water line) do I have to wait before re-launching?
Didn't use it under water
24 hours is fine
Not sure.. most would say 24 hours.. it all depend on temp and humidity. Being in Texas I had to make smaller batch becasue 15 minutes time frame wasn't doing it in 90 degree weather.. dry very fast..Here's part cut off from their website.. You can even do it in water if you really really wanted to.. or use other marine tex products...Can I apply Marine-Tex under the water?Yes, but the Marine-Tex is likely to wash away in moving water while it is trying to cure. The FlexSet is better for underwater applications because it is of a denser consistency. If you would like to try an underwater application, mix the epoxy above the water, then deposit it on wax paper or plastic wrap. Slide the wax paper or plastic wrap onto the palm of your hand with epoxy facing up. Take it below the water line and apply to surface. Be careful not to smack or pancake the product onto the surface, this will trap water under the epoxy. Instead, roll the epoxy onto the repair to push water out of the way. Leave wax paper/plastic wrap on the repair while full cure takes place for best results.Can I apply Marine-Tex in dry conditions on a below-the-water-line application?Yes, the Marine-Tex is an excellent choice for repairing gouges or holes that are located below the water-line. Once cured, Marine-Tex is impervious to water and many chemicals. Since putties will go only where they are placed, be sure that the Marine Tex has completely encapsulated the problem area. It is a good idea to sand the perimeter of the repair so that the Marine-Tex achieves a grip on the solid surface around the repair.
does it come with hardener and everything I need?
Yes, it does. I have used this to make repairs large and small. Great stuff! Be prepared to work quickly, though - it will set up faster the more hardener you use.
Wear the gloves!!! Really make sure every is ready for it.. If you have hole, put tape on other side to prevent it otherwise it'll just go thru till it thicken up. It's great for filling in those rivets and screws hole from previous owners repair attempts as I'm restoring ski boat.
Yes, it is a complete kit
Yes, Marine-tex Epoxy comes with the hardner, Marine-Tex has been used for more years than I have been around by boat owners and builders and fisherman to repair damage to wood and metal gules. The toughest product I know and its completely waterproof.
Is white marine-tex epoxy suitable for repairing a small ding in the fiberglass siding of a motorhome?Does it require painting and a clear coat application after drying and sanding?
Only if you want to change color. I have used a paint to color and it is beautiful. Mix your color in before application. I usae marine tex on just about all fix it projects. Neal
Yes it works great. I have used it for that and many other repairs many times
CLARENCE E. TIMMER
I have used Marine-tex to repair gouges on two small sailboats and have been very happy with the result. I have not needed to protect it in any way and the repairs are only visible if pointed out to an observer.
I would certainly buy this product again.
Used this on a 50 year old MGB fiberglass removable hard top I'm restoring. Used it to patch a deep gash, and also used it to skim coat sections of the gel-coat worn down to the fiberglass to the point threads showing, Worked great, and easy to apply. Nice long working time with the white Marine-Tex. Sands easily. Primed it with Total Boat high-build primer, and finishing with Total Boat Wet Edge Topside paint.
Great stuff...have used it a hundred times.
I would buy this product again
Easy to use, does a great job, looks Great
Canal Winchester, Ohio
Marine Tex is hard to use!
I read and followed instructions and found that filling vertical cracks (up to 1" thick)the product dripped or ran terribly and it was a battle to get it up to stay put until it started hardening in 45 minutes. Mixing proportions are not clear-cut with the kit supplied--i.e. weights and volumes of epoxy and hardener were not clear and whether all of hardener in kit could be mixed with larger epoxy container.
Port Angeles, WA
AMAZING 2 PART THERMO-SET EPOXY
THE KIT COMES WITH A RESIN AND A HARDENER...MIXED AT A 95% RESIN TO 5% HARDENER RATIO.THOROUGH MIXING IS IMPORTANT.YOU HAVE A LONG "OPEN TIME" TO WORK THE PRODUCT, PLUS AMPLE TIME TO SHAVE, SHAPE , MOLD AND CONTOUR THE PRODUCT AS IT SLOWLY HARDENS.DUE TO THIS, YOU CAN PRODUCE A REPAIR THAT IS ALMOST PERFECT AND MAY REQUIRE VERY LITTLE SHAPING OR SANDING. I HAVE REPAIRED A 175 P.S.I. AIR COPRESSOR AUTO WATER DRAIN FITTING WITH IT AND IT WORKED GREAT! JEFF GEYER BOATWORX
JEFF FROM BOATWORX
Sailing Boat repairs
I purchased a quart of white Marine Tex to repair one of my rudders on my son's Hobie 18. A portion the size of 2"X 2" broke off near one of the mounting screws.Rather than try to piece the two parts back together, I drove three deck screws at various location along the break and then tied wire to the screws to act as reinforcement. I created a mold out of cardboard in the shape of the corner and filled in with Marine Tex. The rudder is about 1" thick. The mixing went well and I used plactic spoons to mix the two parts. Finally used a plastic knife to place the mixture into the mold. The mixture took about half a day to cure but is rock hard. Will next shape the corner by cutting the excess and sanding the rest. Next will drill the new mounting hole. Next project: Repair cracks in the hull of my Sunfish. GREAT PRODUCT!!!!
i use to race gokarts i use M T to put i exhast port to reshape the port to what i wanted some of those exhast ports got 400 degrees and never came out great stuff really work have use about 4 guart set ups and getting another one soonalso use to reshape the intakes on those gokarts use a flow bench to shape what i needed won 18 races out of 20 one year
Made an Intake Manifold of Grey Marine T
I made an Intake Manifold for a Chevy 3100 V6 Engine, Modifying it from fuel-injection to carburetion. So Multiple Fuels could be used. The Grey Marine Tex worked perfectlly, and is also imperveous to gasoline. This is the 6th time I have ordered Marine Tex for similiar projects on Engines. and I will be ordering more for projects in the near future.
"Photography by Axtel"
Super great product
Used to fix screw holes that were in transom from trim tabs. Worked really great. This product will be on our Number 1 list.Hard as a Rock, sanded and painted with ease.
Repaired Cummins Engine Block
Just repaired a machine tool handle, the Marine-Tex I used was over 35 years old. Left over from a old employer, even broke glass jar trying to get it open. But save the hardner. the job was sucessful. Glad I found M-T on web, may need a new supply in the next 35yrs. WHAT A GREAT PRODUCT!!!!!!!