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Author Topic:   3m-4200 ? for Transducer Mounting
AnthonyT posted 06-12-2002 04:12 PM ET (US)   Profile for AnthonyT   Send Email to AnthonyT  
I've read all the articles regarding mounting transducers and bedding the screws with 4200 and that is clear.

The one question I have is, how much time must I give 4200 to set/cure prior to putting it in the water ?

Thanks in advance,

OutrageMan posted 06-12-2002 05:03 PM ET (US)     Profile for OutrageMan  Send Email to OutrageMan     
What does the tube say?

I think 24 hrs should do it.


AnthonyT posted 06-12-2002 05:43 PM ET (US)     Profile for AnthonyT  Send Email to AnthonyT     
I don't have a tube of it yet...

The reason why I'm asking is more for scheduling..
If I need a full day of curing prior to placing the boat in the water, I then need to make accomondations for it.... From what you are saying I can't just slap the transducer on with the screws bedded in 4200 and then place the boat in the water... Wishful thinking, anyway...


jimh posted 06-12-2002 06:01 PM ET (US)     Profile for jimh  Send Email to jimh     
While 3M-4200 is a fine product, it is by no means the only product that can be used in bedding screws. In fact, some would say there are better products.

Whaler themselves uses Bostik 920, although this is hard to source in small tubes.

Zillions use a boat caulk type product.

3M also make boat caulk products, which cure faster and don't have as much adhesion as 4200.

3M-4200 is a strong adhesive, not quite as tenacious as 3M-5200, a products whose grip is so strong that special solvents must be used to release it.

3M-4200 is also available in a Fast Cure (FC) variety. The regular version takes quite a while to set up, perhaps as long as week to reach complete cure; the FC version takes less. From what I recall, water actually helps them cure.

I am sure a company as large as 3M must have a website or an 800 number where you can get much more information about their 4200 product and from first hand sources.

Tom W Clark posted 06-12-2002 09:04 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     

There is 3M 4200 and then there is 3M 4200 FAST CURE. The former may take several days or a week to fully cure, the latter takes maybe 24 hours.

Remember, polyurethane caulks like 3M 4200 cure by contact with moisture as do polysulfide caulks like 3M 101, and Boat LIFE Life Caulk. So to answer your question, you may launch immediately after caulking your transducer. No problem.

AnthonyT posted 06-13-2002 03:59 PM ET (US)     Profile for AnthonyT  Send Email to AnthonyT     
Thank you for the information.. sounds like I'm good to go... drill, fill, screw and launch


timbo posted 06-23-2002 11:44 AM ET (US)     Profile for timbo  Send Email to timbo     
I have a 73 13' sport, all the repairs I have done I used 5200 fast cure. The main difference between the 5200 and 4200 is 5200 is more permanent and substantial. I use the fast cure, because When I fix something i like to go out right away and see how it holds up.

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