3M 5200

[JK86 Starflite]

Hey Guy's,
I am ready to put all of my stringers in on my mate and was wondering if anyone has used 3M 5200 to attach them to the hull and then fiberglass over? any other products for resin coated wood to the hull? Thanks
JK

[175checkmate]

When I did my stringer install I used kitty hair bondo. Its water proof. Goop-ed it on real good to lock it down. Then used the same stuff to fill the 90 deg. angle between the hull and the stringer. Glass just hates to make a 90 deg corner.

[JK86 Starflite]

I have used kitty hair before on other projects. My concern is that it is a very brittle product and will not allow for any flexing of the hull. Have you noticed any separation of the stringer to the hull?
JK

[175checkmate]

I have not run the boat yet. I do no that the first stringer I glued down did not set straight. So I had to remove it. That was a ton of fun. The string was in for 3 day. I used a large hammer to remove the stringer. The stringer broke everywhere but the joint. I ended up having to grind all that mess out and start over. Not a real good time. Strong stuff. It is still just a base for the fiberglass. I fully enclosed the stringer in glass.

[Chris E]

5200 is a good product, sea ray used in on their boats. i have also used sikaflex which is another great product check it out:

http://www.sikaindustry.com/ipd-ma-products

works great on bedding fittings, and have also used to stop leaks in old wood boats.

[JK86 Starflite]

Thanks, I'll check out the Sikaflex. My concern was that when I removed the floor, the old material used to bond the stringer to the floor had separated from the hull. That is why I thought a more flexible product might be better. Maybe I'll do some mock ups on some scrap and see what takes a beating better. Thanks again.
JK

[175checkmate]

Testing would be very cool. Keep us posted. What ever the results there is no way i am tearing up the floor. LOLOLOLOLO

[aaronmt]

I personaly get a little carried away with the 5200. Its a fantastic product I use it on everything on my starflite. Ive heard of sicaflex but never used it yet. Aaron

[cooperider]

Thanks, I'll check out the Sikaflex. My concern was that when I removed the floor, the old material used to bond the stringer to the floor had separated from the hull. That is why I thought a more flexible product might be better. Maybe I'll do some mock ups on some scrap and see what takes a beating better. Thanks again.
JK
That stuff was only meant to hold the floor in place until the fiberglass sets up. Other than that it has no purpose. :surf:

[onthehammer]

Read my lips "5200 is permanent". I love the stuff, unless you have to remove the piece again. I have taken a lot of gelcoat off boats where this stuff has been used to hold items in place. :brickwall: Other than that, great stuff.

[Enticer1]

Hey Guy's,
I am ready to put all of my stringers in on my mate and was wondering if anyone has used 3M 5200 to attach them to the hull and then fiberglass over? any other products for resin coated wood to the hull? Thanks
JK

Starflite, 5200 is an adhesive/sealant meant for things like ports, thruhulls, ect. You probably don't want anything even slightly flexible bonding your stringers to the hull. 175Checkmate is on the money with his suggestion. Another thing you might try is resin and milled fibers, remember you can repair polyester with epoxy but not vice-versa. As far as the 90 degree angle, just make a nice round fillet with a spoon while your mixture is still wet and you'll have no problem with the cloth or mat later on. Its not rocket science and your not on a production schedule so you will probably do a better job than the factory. Good Luck
Doug (Enticer1):cheers

[dfarina]

I've used West System's 404 Hi-Density Filler to bond stringers and fillet the edges. Just mixed it with resin/hardener until its about the consistency of peanut butter.

[Chris E]

I've used West System's 404 Hi-Density Filler to bond stringers and fillet the edges. Just mixed it with resin/hardener until its about the consistency of peanut butter.

i forgot about that stuff, it would work awesome. west system is pricy but its easy to use.

[JK86 Starflite]

Thanks for all the suggestions guy's. The weather here in Md, is going into the low 60's so I'll be able to get the boat out of the garage. I am going to go with the kitty hair bondo on the bottom of the stringers and then glass everything in tomorrow. When I brought the boat home the two center stringers were de laminated from the floor (fiberglass and whatever checkmate used on bottom of stringers). I want to make sure this new floor stays put. I think the idea of using the bondo to fill the 90 degree angle is great idea. Thanks again.

JK :thumb:

[SCT]

What's the best product to remove residual 5200? I installed my thru hull hyd. fittings w/ 5200 and some oozed out. I'll probably try acetone first.
Any others?

Cheers-

[175checkmate]

JK, the hardest part will be applying even pressure to the string while the kitty hair sets up. I used thin metal straps that ran over the top of the stringer, made them so they extended outward. I then place weight on the end to apply pressure to the top of the stringer. Made for a real tight bond.

[Chris E]

What's the best product to remove residual 5200? I installed my thru hull hyd. fittings w/ 5200 and some oozed out. I'll probably try acetone first.
Any others?

Cheers-

that's what i'd use 3m also makes some solvent products that may work. something else i've used on gelcoat with good results is gun cleaner for paint sprayers - toxic stuff though.

[JK86 Starflite]

All,

Well the stringers are down with the kitty hair bondo. Seems to me that they will be down longer than I'll be alive! The first layer of glass is also down. I pulled the old floor out of the shed for pattern reference for the deck and noticed that whatever we are doing when we rebuild these floors is much stronger than the factory build. The time and attention alone is what makes the difference. Thanks again for the suggestions and I hope to tap your knowledge on other "things" that need to be done.
JK

[Mark]

Here's a step by step I did on my Starliner. Could be of some help. http://checkmate-boats.com/forums/showthread.php?t=4539&highlight=born

[JK86 Starflite]

Mark,
Thanks, I read your thread about a month ago when I purchased this boat, great job! I have learned a lot from your project and others. This forum is a wealth of knowledge. I have way to go, but nothing major. The motor comes off next to correct some tight steering and tilt problems, nothing but cleaning and greasing i'm sure. I need to get my new upholstery ordered so I'll be in time for the season. This my first checkmate, former Baja owner. I hope you all won't hold that against me! I'll be checking back in on several threads I'm sure. Thanks again and talk to you soon.
JK :cheers