We are installing a new depth finder transducer. The old one didn't work and it was bear to get out. Had to soak with a rag full of 3M adhesive remover for 24 hours. We are hesitant to put 5200 adhesive on in case we have to remove it or replace it. Any suggestions. We have heard 4200, life caulk and any marine sealant. Thanks
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Phil Mc
Silicone works fine,
I used a a glob of marine silicone adhesive, squirted it out in a little mound, avoiding air bubbles, and squished the tranducer slowly in the glob. Works great.
I used a a glob of marine silicone adhesive, squirted it out in a little mound, avoiding air bubbles, and squished the tranducer slowly in the glob. Works great.
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Tom Monroe
polysulfide
The marine surveyor who did my boat told me polysulfide below waterline, silicone above.
The marine surveyor who did my boat told me polysulfide below waterline, silicone above.
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Ed
depth sounder installation
Life caulk works well both above and below the water line and is easier to work with and remove than 3M 5200. Try a product called Anti Bond to remove the 5200, it also removes vinyl letters, and most other sealants.
Life caulk works well both above and below the water line and is easier to work with and remove than 3M 5200. Try a product called Anti Bond to remove the 5200, it also removes vinyl letters, and most other sealants.
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VIEXILE
MARINE silicone above, polyurethane below
I believe it's "silicone above the waterline, polyurethane below." In any event, 4200 is a fast er curing 5200. Same removal problems. I just installed my transducer with 5200 and all new through hulls (5) below the waterline. It is nasty stuff, sticky and gooey, but I prefer it for underwater goodies. Besides, I figure this is a 10 year installation, since the old through hulls (VERY brittle bronze from 1972) were in for over 30 years. KW 18N64W.
I believe it's "silicone above the waterline, polyurethane below." In any event, 4200 is a fast er curing 5200. Same removal problems. I just installed my transducer with 5200 and all new through hulls (5) below the waterline. It is nasty stuff, sticky and gooey, but I prefer it for underwater goodies. Besides, I figure this is a 10 year installation, since the old through hulls (VERY brittle bronze from 1972) were in for over 30 years. KW 18N64W.
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Rich
marine silicone but not polysulfide
The other reader is correct--marine silicone above, 4200 or 5200 below, and not polysulfide, which as the manufacturer's information makes clear is for use with wood. There will be folks out there who acquired the folklore view that silicone is not a good material, but they fail to understand that "marine" silicone is formulated for this and is the best material.
The other reader is correct--marine silicone above, 4200 or 5200 below, and not polysulfide, which as the manufacturer's information makes clear is for use with wood. There will be folks out there who acquired the folklore view that silicone is not a good material, but they fail to understand that "marine" silicone is formulated for this and is the best material.
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Steve
4200
3M 4200 should work fine. I've used it on two different boats for thru-hull transducers. No leaks and easy to remove.
3M 4200 should work fine. I've used it on two different boats for thru-hull transducers. No leaks and easy to remove.
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VIEXILE
Read the Label
Again, I believe 4200 is just a faster curing 5200 , polyurethane based sealant. Read the labels. Inquire at 3M.
Again, I believe 4200 is just a faster curing 5200 , polyurethane based sealant. Read the labels. Inquire at 3M.
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David
I used 4200
When I installed my knotmeter thru-hull. Only been in the water 2 weeks but she is bone dry so far... 5200 seems far to permanent for a thru hull for my liking. My 2 cents worth David
When I installed my knotmeter thru-hull. Only been in the water 2 weeks but she is bone dry so far... 5200 seems far to permanent for a thru hull for my liking. My 2 cents worth David
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Gerry, Newbury MA.
4200 -5200
4200 tacks up and cures faster than 5200 but is not as agressive as 5200 as an adhesive, thus it can be removed easier. 5200 on the other hand can tear apart your outer layers of lamination upon removal.
4200 tacks up and cures faster than 5200 but is not as agressive as 5200 as an adhesive, thus it can be removed easier. 5200 on the other hand can tear apart your outer layers of lamination upon removal.
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Tom S
There really isn't that much difference between
the two. Both are very tenacious. Its actually not that big of a difference even though they position is that way. (They claim " that 4200 is approx. half the strength of 3M™ Marine Adhesive/Sealant 5200, which allows for disassembly of parts.) But reading the Spec's it looks like 4200 is "some tough stuff !!" don't get a false sense that 4200 is that easy to remove. But then again everything is relative. 4200 has a 258 psi shear strength for fiberglass on a 1 inch overlap. http://multimedia.mmm.com/mws/mediawebserver.dyn?rrrrrr9yJCFrL7Srd7SrrrGLKbMS71fp- 5200 has a 283 psi shear strength for fiberglass on a 1 inch overlap. http://multimedia.mmm.com/mws/mediawebserver.dyn?rrrrrr9yJCFrL7Srd7SrrrGkqbMS7DUO- But all this depends on the material used for the thruhulls Something that is REALLY peculiar is that the specs show that Fast Cure 4200 is MORE tenacious that 5200 .... Just look at the psi shear for Stainless Steel and ABS and Gelcoat. It shows 4200 to have a higher adhesion BTW the 4200 cures faster because its "Fast Cure". There is a regular 5200 and a "Fast Cure" 5200 that cures about the same amount of time.
the two. Both are very tenacious. Its actually not that big of a difference even though they position is that way. (They claim " that 4200 is approx. half the strength of 3M™ Marine Adhesive/Sealant 5200, which allows for disassembly of parts.) But reading the Spec's it looks like 4200 is "some tough stuff !!" don't get a false sense that 4200 is that easy to remove. But then again everything is relative. 4200 has a 258 psi shear strength for fiberglass on a 1 inch overlap. http://multimedia.mmm.com/mws/mediawebserver.dyn?rrrrrr9yJCFrL7Srd7SrrrGLKbMS71fp- 5200 has a 283 psi shear strength for fiberglass on a 1 inch overlap. http://multimedia.mmm.com/mws/mediawebserver.dyn?rrrrrr9yJCFrL7Srd7SrrrGkqbMS7DUO- But all this depends on the material used for the thruhulls Something that is REALLY peculiar is that the specs show that Fast Cure 4200 is MORE tenacious that 5200 .... Just look at the psi shear for Stainless Steel and ABS and Gelcoat. It shows 4200 to have a higher adhesion BTW the 4200 cures faster because its "Fast Cure". There is a regular 5200 and a "Fast Cure" 5200 that cures about the same amount of time.
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