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Can I use polyaspartic or polyurea epoxy?

I will be building a 78-foot boat, Carbon fibre is one choice to make it out of, the other is Aluminium or stainless steel, I have not done any fibre glassing in the last 30 plus years, forgotten a lot of info. Thinking of using a slow setting resin, something like 12 hours to set and 24 hours to cure, will need to relearn about the colour gel coat, form work and none stick coating, I will take around 6 mth just to do the hull and maybe the decks and strengthens and bulk heads ECT, then the rest take up to 2 years to complete

Beautiful finish

Nice. You explain everything nicely

1 million views! I've been looking for this video and apparently so has everyone else

I am a certified journeyman shipwright recently retired. I am amazed at one thing I've done wrong for the last 50 years. Never too old to learn.

Thanks for your video. I realized I have part of this job ahead of me. Luckily, only the compound around the lid, the lid itself is good (according to my experiments)

Waste of time to watch this video. We were looking for results.

West system is the best system

I'm a big fan of your channel. You are a very good teacher. It answers so many questions I had on various topics related to fiberglass and painting. Thank you! One question I have, thar may be answered in the follow-ups of this video, is how you can detect you have sanded enough prior to applying a primer? Is it when there is no paint left, when the surface is smooth, or else? I'm afraid of removing too much, or not enough, by not knowing what to look for. Thanks again!

been meaning to ask, is your workshop near the water. just curious about the viability of a boat shop NOT near the water.

I have a 25B, my twin mercruisers were removed and replaced with a large single diesel moved fwd for the V shaft drive which improved the balance and handling of the boat. Acording to Ray Hunt, the balance point of the 25B is 10ft fwd of the stern, so thats where all heavy things should be installed.

Can you show us how to roll out gelcoat with a roller and make it stand up for a nice gelcoat nonskid? Sand works, but it’s totally cheesy.

Fuel tank. Im surprised you cant modify it to fit? Cut an inch out of it all round and stick it back together, thats how bertram make them. Or make your own from scratch, i think epoxy is ethanol proof. Alternatively you can gets tank made from plastic, they plastic weld the sheets together, mates got one in his 32ft diesel, he loves it.

hi i love your videos i have a question how can you find out if a boats stringers were hollow from the factory or if the wood was rotted out completely and all traces are gone . it may sound like a foolish question but i am looking at a fiberglass gillnetter by robert with no wood in the fore stringers and im stumpted

Andy great vid however more info would be great comparing vinyl vs poly in the long run, not so much working with them, you covered that. Ive been lead to believe ester dries much stronger than poly, and bonds better as well. Your thoughts? Oh cost comparison would be cool as well.

Those powered hand shears are amazing!

I had runs all over the place with Alexseal. I want my money back.

You mentioned here that gel coat isn't compatible with epoxy layup here, but don't really explain why. I've seen on your channel testing showing gel coat will stick to an epoxy layup just fine -> ruclips.net/video/kHAbyglpp3M/видео.html Just curious, what's behind the change of opinion?

Epoxy for bonding dissimilar materials, ester for laminating. If you cant do the whole job in one hit with epoxy, dont worry about it. Also epoxy turns yellow and breaks down from uv exposure and needs to be painted or clear coated with a gelcoat or 2pack spray.

Andy, do you know you a leaning right, right shoulder low? By-product of surgery no doubt.

That flexible trowel is f****** badass

Epoxy should work with the glass too? I've seen some people have issues with it

I am new to this so I’d like to ask a stupid question. I understand why you would not use Topside for areas below the water line but is there a reason you would not use the same below the water line paint on the entire bottom. Thanks in advance for tolerating my lack of knowledge

8 years ago… 8 years ago I probably watched this when I was bored and not understanding the full process. And there’s 2024 I bought a boat a year ago and I decided to build stuff for my 1968 boat 😂

Great video. I'm thinking of using the Coosa on my foredeck. Just out of interest, how thick is the outer fibreglass skin on the transom? I'm not really a fan of coring under the waterline.

I'm glad you are doing well and recovering rapidly!

Attacking a new to me process doing a balsa core in a race boat. My plan was gonna be epoxy over a honeycomb lightweight core. But I have lots of friends in the unlimited hydroplane racing world. And 2 of them who I greatly respect stopped and schooled me. I will be using balsa and vinylester. I have never used vinylester. I will be revisiting some of your older videos to refresh my memory. In my case I need to match the outer skin of my hull to a certain level on the inner skin over the core. Oh and vacuum bagging coming too. You might say I am over my head! But I am also chasing triple digits and wanna be as safe as possible. Hope you are feeling good with your shoulder.

I am about to do transom and stringers. I got a 5 gallon of poly resin but it says perfect for marine and auto (above waterline). The guy I got my resin from runs a repair shop and says he uses it but I am hesitant. Is this okay or should I look for a different resin? The one I got is ClearCote General Purpose low profile laminating resin. Product code is 124445 Love the videos! They've helped a lot! Thank you!

Can you gel coat over interlux 2000e barrier coat??? Thanks Andy for all the info. I’m a backyard boat rebuilding person on my first boat. I wish I could get on your pateron

Hey Andy great content its very helpful. I have a 26 ft 1967 Columbia sailboat. The boat is in good shape structurally, but the crazing and cracks in the gelcoat that you explained in this video are happening on every square inch of the hull and deck of my boat. Is there a way to fix this apart putting a new layer of fiberglass over everything? Thanks

Adtech is another option as an in between for epoxy and gelcoats

Thanks Andy 😁👍

Glad you"re back! Always intresting and well produced. Any Bertram progress?

I am confused. In your old video, you tested the gel coat over epoxy and concluded that it was totally fine. What has changed? ruclips.net/video/GwS4YgoGFm8/видео.html&ab_channel=BoatworksToday I don't try to be rude. As a new boater, I want to tackle a small project of closing holes from old instruments in the sailboat cockpit. As that referenced video showed up recently in my suggestions, I thought of using epoxy as It is a small patch. My considerations were: I already have epoxy, the same as in your old video; polyester has a short shelf time. I will have to throw away the can after the project as I will use only a small part for the project, and I hate throwing away stuff, especially when it contains harmful chemicals.

🤯

As a fiberglass tech of 45 years and having been certified by many of the major gel coat and fiberglass tech schools in the USA here is the real scoop. Blisters in a boat are always caused by uncured resin during the manufacturing process; gel coat is actually porous and when the vessel is kept in the water (usually standing warm water without much current) the water actually permeates through the hull and into the laminate below and mixes with that uncured resin and it creates an acid, that acid expands and expands through the gel coat barrier creating the blister. The only way to properly cure a boat that has a blister problem is to grind/dremel out the blister, clean, prep with acetone and then apply epoxy mixed with a filler like cabisil, then over coat with epoxy primer and bottom paint. If there are hundreds or thousands of blisters…you’ll need to use a peeler and remove all the gel coat from entire bottom and then roll & tip a few coats of epoxy to high build and then epoxy primer the entire bottom and then apply a bottom paint of your choice. I’ve literally done hundreds of blister boats and lightning strike boats that require the same procedure. For whatever reason Power Quest boats are notorious for having blisters.

hey brother what's up with the Butrum?

Hey Andy. I did my wet work with polyester resin. But i purchased epoxy primer& barrier coat. And epoxy fairing compound. Doesn't sound like a gel coat is compatible with the epoxy

What an informative video, Andy! Nice one!

Great video! When you mention the laminating window on epoxy, can you clarify that a bit more? I'm currently doing a very large repair with epoxy after recoring our whole deck, I've been laminating immediately after getting the air out of the layers. Is that too soon or is it fine since the whole thing cures together? We're working in the heat in Texas so I'm mostly trying to beat the epoxy before it flash sets. I do have to tie in the laminations since we're going about 6ft at a time, but I've been sanding back to taper them in together and so far it seems to have held.

I use epoxy for everything I've had very good luck using it

Love your channel. Just wondering why you didn't sand the paint off? Is it not necessary? Please explain. Thanks love your work and explanations.

Tropical hardener???

I'm making a small model boat about 3ft long, and want to cover it in surface tissue with resin on the inside where the hull meets the shell...I already bought epoxy resin and RTU, but still not sure it is the correct choice. I will be doing one side first and then when it is dry, it will be ground back on the edges until it is just big enough and I can put the sides on, then when ll is done the outside will also get tissue and resin. Only want to paint the bottom facing bits where it might wear against surfaces... and varnish over resin the rest. SO I need to be able to not do it all in one go.

Can’t really even use poly here in southeast Alaska we only get maybe 20 days all summer above 65 so I have had to do all epoxy

Another great vid, recommend people slow it down and watch it two, three times. There are many stitch and glue designs where the naval architect calls for epoxy resin and you still want that gelcoat finish. There will be a bunch of these guys pulling there hair out about now haha. You should link your video of the gelcoat over epoxy tests, which showed us it is fine for poly over epoxy with the correct preparation. It might quell some of those comments

Does all fiberglass resin work with all hardener?

At the 12:00 minute if i understood you correctly. Material had been introduced like a transom cut out with an epoxy bedding. Leaving a narrow joint as mentioned. I'm not an engineer of composites, but with minimal welding experience i believe it may introduce possible integrity issues. Weird stuff goes on between apples and oranges. I agree with you Andy, but weird things goes on when stresses move around.

Andy, really miss your old stuff from 10-12 yrs ago.