first boat......question about sealant?? Please help

[1970newport30]

Hello everyone,

Just bought my first boat, and couldn't be happier. Wondering if a specific type of sealant I have is right for the job. The precise sealant name is:
"One Part Polyether Urethane Sealant/Adhesive". It actually says on the product that it will adhere to fiberglass and is safe to use on marine projects above the water line. I guess my only real concern is that it didn't really come from a major marine supply store (i.e. west marine). I plan on using it for resealing deck hardware, re bedding the port lights and the haul-to-deck joint. Any help, comments or input is greatly appreciated. I got this boat real cheap and it looks like it hasn't been maintained properly, so i just want to do it right the first time.

Thanks for your help,
Jesse

 

[F_R]

Re: first boat......question about sealant?? Please help

Got a brand name on that sealant? One particular high quality brand is sold by the West Marine type stores.....and Home Depot. Check out what they sell here at iboats.

 

[tashasdaddy]

Re: first boat......question about sealant?? Please help

for what you are doing i prefer 3M 4200. what is the brand name of what you have?

 

[Wotam]

Re: first boat......question about sealant?? Please help

Over the years I have used most brands/variants of marine sealant That's commonly available... 3M, Sikkaflex, Boatlife... etc They all work ok.

My favorite marine sealant is 3M 101. Thicker, more flexible, lasts a long time and finishes out very smooth with a bit of mineral spirits on a finge. Costs a few bucks more.

If you want an adhesive/sealant (structural properties) I recommend 3M 4200 or 5200. 5200 has pretty serious adhesive properties, so don't use it on parts that you want to remove periodically, it's a bugger to make it let go.

There are a number of articles on the web about how to do this right. One key element is not fully tightening the hardware until the sealant sets up to form a gasket under the part being bedded.

 

[gcboat]

Re: first boat......question about sealant?? Please help

Here's a little reading for ya' :http://www.boatus.com/boattech/casey/35.htm[/url

 

[1970newport30]

Re: first boat......question about sealant?? Please help

here is a link to the exact product I was talking about:
http://www.topindustrial.com/prodset.htm

any additional input is appreciated.

~Jesse

 

[Arima90]

Re: first boat......question about sealant?? Please help

I'm a true believer in the 3M 5200 or nearly any of their sealant products. They do a good job of standing up to harsh enviroments. Just as an example; I used the 3M 5200 and J-B Weld on the lower case of my kids Honda 300 Quad. Thing was leaking from both areas like you wouldn't believe and I was told the 3M would work better than J-B weld with a good clean surface. So I used both, because I had always appreaciated J-B Weld. Within a couple of rides that J-B Weld patched area was leaking Oil again, however, it's been a year and the area patched with the 3M 5200 hasn't leaked at all. Says something about the 3M product.

 

[tomh59]

Re: first boat......question about sealant?? Please help

For me 3M 5200 has stood the test of "below the waterline" in salt. I won't
use anything else. It does take a week to fully set up.