3M 4000 or 3M 4200?

[boatman37]

planning to rebed everything this weekend. i got 4200 for all the transom stuff but which should i use for the rails, cleats, etc? i had read to use 4000UV for anything in sunlight? i have a tube of 4200 but no 4000 but will get it if thats what i need

 

[SkaterRace]

Yes if it will be best to use 4000 if it is exposed the the sunlight. I would suggest using 5200 for the transom as far as I understand that lasts much longer and is more solid but I am sure I might be wrong and someone will let me know it.

 

[mr 88]

5200 is pretty much permanent ,as in once its on its not coming off without taking everything its attached to with it.

 

[jbcurt00]

4000/4200 above the waterline

5200 below the waterline

 

[boatman37]

5200 for swim platform, transducers, trim tabs, etc? my concern is if i want to reseal those things in a few years i will have a hard time getting it off and had heard that it might pull the gelcoat with it? or is that the point? that it is so strong that you don't have to reseal it every few years?

 

[H20Rat]

It is more or less permanent, the concept of resealing doesn't apply any more! I've had to remove 5200 that was a couple years old, and generally it can only be removed by mechanical means. (drilling out a hole filled with it, grinding it down and repairing the gelcoat, etc...)

 

[thumpar]

I prefer 4200 unless it is something that will NEVER be changed/replaced. 5200 is a one time deal. They both can go below the waterline.

 

[spoilsofwar]

I prefer 4200 unless it is something that will NEVER be changed/replaced. 5200 is a one time deal. They both can go below the waterline.

I agree. I've used 4200 below the waterline on underwater LEDs.

 

[jbcurt00]

Yes they both can go below the waterline.

I posted my preference, 5200 below because its as near permanent as possible and makes resealing (hopefully forever) unnecessary.

 

[SkaterRace]

I agree if under the water line I like 5200 as I have yet to have a reseal it. I also found it quite useful for things other than sealing like fixing these 2 spots of where the gelcoat was chipped off back to the fiberglass. Used it on a old boat when I bought it and it had that and on the newest one too. Been 6 months and still strong. Also a hell of a lot cheaper than buying a tube of gelcoat if you always keep 5200, 4200 and 4000 UV around like I do I always find uses for them weather it be boat related or other things like on the house or car

 

[boatman37]

thanks guys. i think i will go with the 4200 below the waterline only for the fact that i already have it and on the chance that i may have to remove it at some point for whatever reason. i don't mind resealing it every few years either but hopefully i have my nxt boat by the time it needs redone again