professionally installed foam years ago. store cold at or near mid 70's, i live in florida so i dont expose the resins to the ambient air until its go time. also the mix is very important. a proper mix looks nearly all 1 shade of banana pudding...caramel swirls no good. that shows up later in the cured foam. when the blobbs have large bubbles 1/8" + and semi translucent thats a sign of a bad mix. use a drill with a paint mixer, then drop mixer into bucket with acetone to reuse. that same 15 seconds with a drill gives 100 x's the quality of mix. a tip to help the foam flow to nooks and crannies as specially for my fellow boaters near the equator. do it first thing in the morning before it gets hot. the chemical reaction creates heat, and the reaction is also sped up by heat so its self accelerating. the cooler you store the resin and the cooler the part being foamed the longer it will remain liquid allowing it time to move before the rise. so store cold, pore cold in the morning, then as it cures and the sun comes out it will get a nice heat cycle to cure. by lunch youll have a finished product as good as a million dollar boat. i have also mixed in a gallon zip lock bag for small batches, snip the corner off and its very clean way to dispense with no buckets to clean.

dug a lot of that stuff out of boats when it became waterlogged, check monthly for dryness and expect to replace every few years.

Likewise - very informative. Subscribed as I am doing the same on my Chaparral - floor replacement. Winter project so foaming (in Canada) May be some months into the new year. Cheers!

Your videos are very thorough, I can see the need for that. I find myself skipping ahead, but I have done some regular fiberglass work where I can see you are targeting the newbie. Thats a good thing, and I am sure it is appreciated!

Awesome work! just started demo on my '86 Chaparral xlc restore, will definitely use your videos for reference!

Thanks. This vid helped me a lot!

great video mate. hey once its sanded can you stand on the foam bits or do you glass in the timber again?

Nice job, car ramrod!

Nice work good to know if you need to fix your floor

Just found your Channel, great job on the expansion foam. 💛👍👍🚤

For those who don't know and don't want to damage the threads for your cap, just stick a flat head screw driver we through the inner cap seal. And then press down gently and pri off the cap. You can still cover your tin if you don't use it all.

If you spike through the inner cap with a screwdriver then just lever it off, the threads will not be damaged at all.

To slow down the reaction (foaming) put the 2 pac liquids in the refrigerator and lower it to "a cold day" temperature - 15 Deg C.

That was so satisfying to watch haha. Could you use more smaller diameter holes if it were a long area say 3x1 ft. Thanks subscribed.

I used US Composites on a deck re-core. Great products. Best price on epoxy.

What density are you using ? I had bought some 16 lb from Us Compistes, it didn't expand well . I bought some fresh stock from another vender and it worked great

I have a 88 Mako walkaround. Previous owner removed the foam under the cabin liner, which now moves around a bit in a choppy sea. The hull rattles above the water line when hit by ways. Any thoughts on how to get foam up into the sides and under the liner to support it?

After clean up so you plug up the pour holes with wood? do you leave them open? What is the next step? glass over the whole deck?

If you spray the inside with water lightly it will react faster, if its a hot day with high humidity it also helps.

its a nice video, can we make that PU foam out of part A and B mix as foam core material of fiberglass project for boat? thanks.

Might you know the maximum temp this mixture becomes and for approximately h ow long - when it sets? I have an app where I can see using this to fill voids (to help preventing rattling) in an interior car plastic panel. My concern is that this heat could distort the original shape of the interior panel. Do you know of any such similar products that have a lower cure temp.

Thankyou vm very useful your tutorial. I need fill empty spaces in two sent of my canoe. and I can see a lot of more security filling that air spaces. But I dont know where to do the holes .i supose one big in the top but I" living in South America and Is not easy to obtain closed cell liquid urethane foam expanded .Health for you and yours

Ok what I did is take painters tape and mask off the holes it makes clean up a breeze

Maichel I already subscribed. Thanks . Although I was not clear on the location of the holes. you kindly answered me : 3 holes . To the back, in the middle and to the front. If you had a scheme, drawing or tutorial, which is more didactic for beginners, I would appreciate it. Thank you. Health and prosperity and Peace for all!. great greeting

I spent years on the decks of USN destroyers, and I would have taken a marlinspike to the part b can after about 10 seconds.

Thanks

I bought an old Wellcraft (1988 210 classic) about three weeks ago. Your excellent videos will come in handy for repairs. Did you do the sea trials of Canyon Lake?

Where do you purchase your marine foam from

Quick one foaming a bow section (commercial boat building) I wasn't paying attention to mixture it came shooting out that hole it was whistling like a train and I'm rushing to scrape away and at same time hide excess,it was funny as hell no one saw it no cameras then so I got away with it and if that boat ever sinks it won't be by the bow!

Thank you. Can you tell me where did you buy the part A and B?

Hello You have amazing videos I was watching you measure the moisture content on a transom tear-out. Did you know those are about as worthless as trolling motors on a ship. They only measure the surface of wood. Moisture is measured by weight. Take a block of wood and soak it in water for a day and then start a daily weight measurement and at the end of 30 days see how much it weighs.😊 I did a test with calcium chloride and a piece of wood and in a box. I covered the box with some cloth and an unbelievable thing happened. The cloth absorbed all the moisture and this experiment was done in March of 2021 And to this day the cloth is sill as soaked as the day I started the experiment, unbelievable. I’m wondering if you were to try this if a damp cloth like this would be beneficial in your trade and perhaps it could slow down a drying process in anything that needs to cure slowly. Re; my comment about the moisture meter. I’m guessing you only need the surface free of moisture to lay the glass on?

The msds sheet should have all the specs for any product used including expansion factors and quantities as well as pupose use and other pertinent data that should be read prior to use of any such product. Msds sheets can be obtained at place of purchase. Msds is .anufacturers specifications and data sheet.

A hole one end and another diagonally opposite and block the poured on as soon as the goo goes in it will spread right across with little void.

Sir where you bought poli yourithene from ?

Thank you for this very interesting and informative tutorial. I was wondering if you retained the plywood discs and refitted and plugged them using epoxy, or if that wasn't necessary.

Foam is expensive, i collected mayby 250+ 2 liter water bottles. Took the labels off rinsed fresh water and dried them then put the caps back on and shaved them under the sole, then fomed them all in. Save lots money, used maybe 1 gallon of foam on 16ft hull.

You could've put wax paper down around the hole with painters tape and then the overflow wouldn't have adhered to the wood decking.

I have a 16ft boat how much foam would I need for that

Good video. Thanks. How much time do you give it to expand before you pour the next one?

The A/B foam gets kinda pricey... you can add bits of styrofoam to the mix. It is a closed cell foam and is actually lighter then the marine expanding foam. It works great, fills the voids and saves you tons of $$$. Have not tried it in a transom though...

How much transom pour you used

It would be nice to know the volume of the space being filled

When do you know when to stop pouring?

Interesting Video, but honestly, i would never ever use foam again in a boat. I just removed the old foam from my boat and it was soaked with water….a real pain. The water was most probably coming in from the top over the years or even condensation. There was no way to see that water in the bilge as it was captured within the foam. Now i will do a sort of ladder with stringers which i will cut from foam and than laminate over with fibreglass and epoxy. The different compartments will have small holes at the bottom of them so the water (if any) can travel freely to the bilge….like that water can besten, an even more important the bilgepump can do its job ! With the regard to the your deck…..i would also have glassed the deck with fibreglass and epoxy to seal it for ever !

The boat needs to be lifted at one end to assist in the pour going to the very end, mixing it with just a couple of stirs is sufficient because it will mix further as you pour it through the hole. It if is already foaming it is far to late and will not travel to the furthest reaches before it as gone completely off consequently leaving air pockets..

Foam is required by US coast Guard Regulations on new boats. Foam is not waterproof it is meant to Displace water in compartments in the event the boat sinks. It should float at or just partially below the surface. Foam usually becomes waterlogged when people do not keep their bilges dry as much as possible. Also by not properly sealing Hull or floor penetrations.

How do you know how much to mix?

After you poured and filled rear compartment did you relevel the boat or lowered it down to create foam to run to bow?

The softness is that you didn’t fully mix the product. To reduce cleanup... take a damp sponge to the parameter of the holes which will reduce the bonding and simplify cleanup. I use foam with a 2 second cream time so chance of spillage is greater.

2 zip ties on any type of rod chucked up in a drill makes a cheap and disposable mixing device.

Having spent 40 years in the boat trade i have lost count of the jobs where i have had to dig soggy waterlogged foam out of tanks & double bottoms. None of it is waterproof, its utter shite.

does it work on a pond prowler 8 fishing boat a plastic boat

Can you add A/B foam to an open compartment? Reason I ask is I’d like to add foam to my floor but also see/make sure it’s going where I want, and install floor over top later on.

Does this protect the bottom of the ply or did you seal it with resin before screwing it down on the stringers?

As a boat builder we rarely ever put the foam back in our rebuilds. It traps moisture and that is the reason the deck rotted in the first place. We also have gotten away from using plywood for decks and sterns. We are using koosa. A carbon board that will not rot ever and is totally none absorbent. We only use foam to install fuel tanks or around insulated boxes. Plywood sucks for decks.

Is that Kevlar tabbing or just yellow resin?

😂genius opening the turn on lid to get it we’re it won’t close anymore 😅

I have an air Inflatable kayak it's getting older has a lot of little holes. Curious if I were to pour some Marine foam inside instead of air?? I can leave it inside the rubber kayak.. Or cut it out and have a all foam kayak us the rubber like a mold.!i

I have an 18 foot Cheverton boat how do I work out how much foam mix do I need ?

Stir for 5 seconds, reverse for 5 seconds and reverse once more, then pour.

Has any one tried air/foam-crete for this job? It would never absorb water, is very strong and light...and way cheaper.

raise the bow a couple of feet so the liquid will run to the stern and expand foreward to and not have voids in expanded foam

tip tap a screwdriver into the seal on part b. pierce it and pop it off, can still use the original cap , what you did with the channel locks was kinda dumb.

@05:09... yeah, I would have needed that advice earlier.... :-D

Is there any chance of it swelling the floor or hull?

Was that "bird" in the background a doorbell @00:07 ? 😂

Poxa vou fazer assim na minha cano de fibra

One question does hardener or activator or any of it contain isocyanate ?

How much total area and how much material did you have to use

Why is foam used

Where do you get this ??

Hi. I saw that you used 2 lb. density foam. I understand that there are multiple densities available. Any idea what the benefits are between low density ( 2 lb. like you used) and high density foam ( up to 16 lb. density)? I figure the low density equals lower total weight added to the boat. Any other advantages?

how much space does one of those mixtures youre making fill?

I am curious if anyone has experience pouring the two part, foam in the hull unmixed? Letting it mingle under the deck??? I know lazy, but i hate rushing and making a mess! LOL. PS. you seem to have a great extra hand there, thinks ahead for you with mixer etc. Hard to find...

Nice, try adding 1% of FLG graphene powder to both parts, mix very well first, your foam will be many times stronger, and fire retardant .

You don't measure your cavity and mix to fill just that area? I have watched several others and that is what they say to do so you don't over fill and crack something.

Cool, any link where to buy this foam ?

I am on day 3 of removing waterlogged foam from the bottom of my boat. I am at over 500 lbs already. This made me cringe. I understand the pros and cons to flotation foam. Still made me cringe to watch it go in.

Is it closed cell foam.

can it be used on a aluminum boat???

Makes me want to go get a caramel sunday.

just curious why that deck has no lamination on the bottom side at all? Or does it? It looked like it had none when looking at the holes. I always recommend against wood on a boat, however if fully sealed with glass, it will not ever rot. if you did not lay any glass on bottom or at the very least coat it with a layer of epoxy or poly resin, that floor will rot 100% in a few years. I hope not, but in my experience, it will rot. It sucks that wood rots like it does but it is just not made to get wet. Especially not that wood, that looks to be redwood of some sort, not marine grade ply, but I could be wrong with that as well. You took so much attention to detail with foam! This comment is not meant to bash you or your work, just generally curious/figured id give my professional opinion.

Would sprayfoam do the same job?

Could you use it to fill the voids in a cheaper cooler ❓❓

Foam by its very nature is mainly air pockets and unless the area you are putting it in is totally water tight it will not act as a buoyancy aid. Those small air pockets can quickly be replace by water leaving a totally soggy mess weighing down your boat. The only way foam can act as a buoyancy aid is in small water tight compartments at the bow or sides of the boat.

If I did this the double bottom would not be down already. void city underneath.

Show us the boat when done!

After filling a hole place a heavy block over hole so instead of wasting foam when it comes out it will spread inside more

I have watched the whole video and it would just use less then requested and wait until you find the right material so that nothing is wasted because it too expensive to waste it

Wax the floorboards to prevent the foam sticking.

"tempted to put your put on the hole" what does that even mean?

I have a dog named Jellyfish Jones.😪👍

.....AND WHY can't you just use closed sell spray foam again...? I was absent for that class.

Use a standard screwdriver in poke a Hall in the middle of it and pry it it’ll save the edge

So foam glory holes.

Trippin over dollars to save dimes, those paper towels prolly cost more then the plastic mixing cup..... But really great video good job

Should have covered one hole which would have forced better coverage

pUT A BRICK ON THE HOLE

I get why you like the idea of flotation but I've dug this stuff out when it's wet and seen the damage it does and there's no way this would ever go under my floor.

guaranteeing deck and any cheap below deck plywood will turn into a wet mess of rot in a few years