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Author Topic:   best sealant for wet screws
sr posted 06-24-2003 10:29 PM ET (US)   Profile for sr   Send Email to sr  
O.K. I've searched, I've shopped and bought 5200 and am now ready to affix my transducer. Then I read some more.
Is caulk or the sealant better? When I cleaned up the mess the dealer/rigger did (silicon) I know that is not the anwser.
I did also check the archives via search.
doobee posted 06-24-2003 11:03 PM ET (US)     Profile for doobee  Send Email to doobee     
I would recommend that you use 3M 4200, or Boatlife Lifecaulk. Both are suitable for below the waterline.
simonmeridew posted 06-27-2003 07:40 AM ET (US)     Profile for simonmeridew  Send Email to simonmeridew     
I'd second the 4200 idea; when I was scanning topics and saw this one I thought back to when I was "firming up" loose screws for my Montauk's railing. I used "Gorilla Glue" which isn't good for woodworking but great for "wet wood" not that I have any or at least admit to. I think it's very similar to 5200, a kind of polyurethane; expands like 2-3 times as it cures. Back to the topic: 4200
sr posted 06-27-2003 08:24 PM ET (US)     Profile for sr  Send Email to sr     
I appreciate the info, thank you! Unfortunately living in a small town I rely on my Ace Hardware guy. They can order either of the products and when I looked over his shoulder the listing for 4200 said" same as 5200, but 1/2 as strong".
This is good in case I need to slightly modify the angle of transducer. Now things have to get ugly, because the drilling comes next!
simonmeridew posted 06-28-2003 06:43 PM ET (US)     Profile for simonmeridew  Send Email to simonmeridew     
OK sr
I located what I consider THE technical manual on marine sealants. Way more than you want to know but it will guide you in your purchase. I went with 3M 4200.


JOHN W MAYO posted 06-30-2003 08:57 AM ET (US)     Profile for JOHN W MAYO  Send Email to JOHN W MAYO     
I used the 4200 myself,
I am going to use it today to secure the 4 bolts to mount one of those heavy duty dive ladders use to the transom.
I just hate to drill those holes...,It is almost painfull to me to do that to my Whaler
OutrageMan posted 06-30-2003 09:32 AM ET (US)     Profile for OutrageMan  Send Email to OutrageMan     
I hate to throw a monkey wrench in the works, but I would forgo the 4200 for 3M 101. Being a polysulfide it cures in the presence of moisture. Great for below the waterline. More resilancy than 4200 or 5200.


kingfish posted 06-30-2003 09:38 AM ET (US)     Profile for kingfish  Send Email to kingfish     

I'm happy to take your word that 101 has more resiliency than 4200 or 5200; I've never used 101 so I don't have any first hand knowledge.

Be aware though, that 4200 and 5200 both cure underwater too, and I've never had a resiliency problem with either one.

I'll get my hands on some 101 and give it a try-


Gene in NC posted 07-02-2003 10:24 AM ET (US)     Profile for Gene in NC  Send Email to Gene in NC     
Sc, you don't have to limited to small town resources. With the net you live in a very small world. Any and every thing is available w/o unreasonable effort or cost. Sealants are different from adhesives like 3m 5200. If only selant is needed prob best to avoid adhesives.

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