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ContinuousWave: Whaler Repairs/Mods
3m-4200 ? for Transducer Mounting
|Author||Topic: 3m-4200 ? for Transducer Mounting|
posted 06-12-2002 04:12 PM ET (US)
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,
posted 06-12-2002 05:03 PM ET (US)
What does the tube say?
I think 24 hrs should do it.
posted 06-12-2002 05:43 PM ET (US)
I don't have a tube of it yet...
The reason why I'm asking is more for scheduling..
posted 06-12-2002 06:01 PM ET (US)
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)
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.
posted 06-13-2002 03:59 PM ET (US)
Thank you for the information.. sounds like I'm good to go... drill, fill, screw and launch
posted 06-23-2002 11:44 AM ET (US)
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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