Rhino Liner - Stringers

[Smokin'Mo]

The other night I watched a show called Crash Labs. They were testing ways of preventing a cinderblock building from collapsing when an explosion was set off in front of the 2 storey building. After several explosions and collapses, they sprayed the interior of the cinderblock with rhinoliner and set off another explosion. The building held its shape (it deflected less than 1 inch on the inside surface during the explosion) and did not crumble. After seeing this I thought why wouldn't you use this to spray over all of the stringers and hull instead of glassing everything in. Apparently the strength is unbelievable and the stuff bonds to fibreglass and wood amongst other materials. Alot of people around these parts are using this product on the floors, outer hull, (for beaching) bow deck, and any area that requires waterproof and slip resistant surfaces.

I got a ballpark to spray my boats' under floor surfaces (stringers, hull, transom bulkhead) for about $800 bucks. I haven't figured out how much it will cost for all of the fibreglass to do this job but I think it will be close to the same. Only thing is I avoid the mess, fumes, etc. My boat is a 21' FG Fishing boat with deep-v hull. Middle 2 stringers are 15ft long x 11.5" tall, the other 2 are 12ft long x 7" tall.

Anyone ever heard of this being done to a boat?

 

[turfman]

Re: Rhino Liner - Stringers

If it would work; I'd do it tomorrow. I didn't realize that the stuff is that strong. Sure beats wraping stringers with glass.

 

[oops!]

Re: Rhino Liner - Stringers

hey mo ......

good to see another west coaster here..(i used to live in victoria)

i was removing some really tough black stuff from my boat a while back... did a post on it.... according to one of the mods here...automotive undercoating... and other materials were experimented with in the seventies.

im not a naval archetect.....so anything i say is just lightly educated opinion.

i have been told a vessel must have a certain amount of "flex"........
i personally like strong....and am going to add a full coat of something simmelar in my resto proj......no way water will get into the stringers....and the hull will be as strong as possible.

cheers
oops

 

[Smokin'Mo]

Re: Rhino Liner - Stringers

Hey Oops,

Rhino Liner comes in different formulations depending on the application. The product sprayed into a truck bed is the most common and virtually indestructible while allowing flex. The more heavy duty products are much stronger, while not as flexible. I think I'm gonna use the bed liner type and have them spray it on to about 3/16"-1/4" thickness. The flex issue should not be a problem as a boat will flex over its entire length by a substantial amount but not much in a smaller area.

BTW Nice job on hull the extension, very professional looking.

 

[oops!]

Re: Rhino Liner - Stringers

hey mo thanks......

i just re red my post....it might be misleading.....

im still going to glass in the stringers and floor then im gonna add more glass to everything.... glass if layed correctly, can be as strong as steel............ the stuff im going to use will be insurance.

cheers
oops

 

[Smokin'Mo]

Re: Rhino Liner - Stringers

Excuse my ignorance, but why would the stringers get perforated. If I apply the rhino liner to the floor as well (after screwing down) I'm not sure where the perforation would take place.

Check out this link. Rhinoliner can now be rolled or brushed on with this new type just introduced. Check out the applications they use it for. I think the floor would be a good place to use this stuff. Spray-on below floor.


http://www.rhinoliningsindustrial.com/gfGy6S44anlz/1202492554FastFloor Press Release.pdf

 

[oops!]

Re: Rhino Liner - Stringers

flex......air bubbles....... improper cure....ect
thats in the case of the stringers.......

i wouldnt substitute it for glass anywhere.....but i would add it as extra insurance.....


man the giants are doin really good.....

cheers
oops

 

[tashasdaddy]

Re: Rhino Liner - Stringers

when you fasten your deck down to the stringer, the screw perforates it. you install a seat, it perforates the deck, etc. i hate to say it. but there is not a 100% way of sealing them. that is one reason some of the top of the line boats are going no wood cores.

 

[salty87]

Re: Rhino Liner - Stringers

when you fasten your deck down to the stringer, the screw perforates it. you install a seat, it perforates the deck, etc. i hate to say it. but there is not a 100% way of sealing them. that is one reason some of the top of the line boats are going no wood cores.

i don't think i want to screw the deck to the stringers on mine. i've seen my handy work on backyard decks and getting off-center on a stringer is bound to happen. i'm thinking a construction adhesive of some sort.

 

[tashasdaddy]

Re: Rhino Liner - Stringers

and it is heavy!!!

 

[turfman]

Re: Rhino Liner - Stringers

But would it work?
Seems like a winner to me if it would; as I'm redoing my srtingers with new wood also. How heavy is it? I wouldn't think it would be more than +/- 10% that of glass.

 

[RubberDuckie]

Re: Rhino Liner - Stringers

There are different brands of Rhino-Liner'. 'Rhino-Liner' has become the generic term for truck bed liners, kinda like a photocopier is know as a 'Xerox'. On another boating forum i read, a guy recently had his cracked plastic seat molds fixed up with a type that is plastic based and sprayed on hot. Whereas the real rhino-liner brand is rubber based and cold sprayed. Then there is all the different brands of do it your self stuff too. If you were gonna use it for building boats you would want the right type for the application. But, that has been fiberglass and resin for a long time now.

 

[Zetman]

Re: Rhino Liner - Stringers

I coated all of my stringers in Herculiner. Using a mail in rebate, I was able to buy a gallon for $70. I used two gallons on my project and had plenty left over so I did my gas tank. I was qouted $800 to have a shop spray it on too.
I don't think its heavy, even when I used two coats. If the Army uses this stuff to cover their gas tankers and a bullit will seal itself its good enough for me. It was very easy to do and if you choose to do it yourself you will save a lot of money, plus it was kinda fun too. Here are a few pictures..Zet

 

[ondarvr]

Re: Rhino Liner - Stringers

Smokin wants to eliminate the resin and glass, not just coat the surface.

While the product does stick well to most surfaces and is tough, I don't know if it would have enough strength hold the stringers in place with no other reinforcement. Plus the wood adds some strength, but the glass is supplying more (or all), many times the wood is only really used as a shape, it could be most anything, wood is just cheap and easy to work with.

 

[Smokin'Mo]

Re: Rhino Liner - Stringers

For the stringers I used 4 laminations of 1/4" marine ply for 1" thickness and additional 1/2" marine ply on either side for a total of 2". If this doesn't provide the strength required I don't know what will. All overlaps are 4ft. The stringers are probably around 100lbs each for the long ones and about 50lbs each for the short for a total of 300lbs. I plan to secure to the hull with 3M 5200 or Sikaflex. Both have outstanding waterproof properties but the 5200 is much stronger. I don't plan on doing this project again on this boat so if it is permanent so be it. The next guy will have to grind it all off. I think the combination of the 5200, Rhinoliner and very strong stringers will make for a sound restoration. I will also use the liner on the deck but only after everything that needs to be screwed/bolted down is completed so the liner will cover all perforations.

 

[ondarvr]

Re: Rhino Liner - Stringers

There are stringer systems that are glued in, they're normally a one piece fiberglass grid. They use a 2 part glue that is very strong, some of these are glassed in after glueing for extra strength. I just don't know if I would trust an unkown (unkown for this application) product to hold everything together without a great deal of testing.

 

[Smokin'Mo]

Re: Rhino Liner - Stringers

That's a good point Ondarvr, but like I said in the original post, if a cinder block wall can be coated with this stuff and a bomb exploded literally in front of the wall (opposite side) then the strength is not an issue. The liner did not peel off of the cinderblock and shouldn't peel off the fibreglass. They say it sticks unbelievably well to fibreglass and wood. I have it in my truck bed and have abused it for years with no sign of wear, cracking, peeling, bubbling etc.

When I do this I will specify the type of Rhinoliner called Hardliner. It is stronger than the truck bed stuff and is used by the US military for lining armoured personnel carriers on the inside of the vehicle. It can be applied several coats for more strength.

 

[Bondo]

Re: Rhino Liner - Stringers

Smokin wants to eliminate the resin and glass, not just coat the surface.

Ayuh,....

I Agree with Ondarvr,.......

I think it's a Bad Idea to substitute Putty,+ Bedliner for what Should be Resin......

And,...... Those Stringers are Way Overbuilt.... No Reason for 2" wide stringers,......
Most hulls are lain up with 3/4" Stringers.....And Fiberglass & Resin of course.....

I think you're Way over impressed with 5200,.....
It might be abit tenacious,....
But,... It's Still just a sealing Putty.......

 

[ondarvr]

Re: Rhino Liner - Stringers

Next time I build a cinderblock yacht and want to sail in bomb throwing pirate infested waters I'll know to coat it with Rinoliner.

 

[oops!]

Re: Rhino Liner - Stringers

rvr.......thats funny




mo, yes, the stuff did hold a bomb blast...but thats not what were trying to do here.....glass is the tried and true way.......we all know it works......it wasnt the glasses fault the stringers rotted....the glass was still standing when the wood had rotted away underneath it.......

the testing that rvr suggested......(when he says test....it means guys in lab coats with clipboards).....should be done before it goes on any vessel vhere lives may be at stake.....

having said that.....its your boat man....you can do what ever you want with it.......keep us posted

cheers
oops.............gotta go to the rockets game now......hope we dont get our a.....kicked...!