GOOP vs 3M 5200

[steveooo]

Originally Posted by Hunters Pa

The goop is more rigid, like a cured epoxy.

I disagree. Goop is very flexible when cured. I think the Goop should be sufficient for this application, although I do think the 5200 would provide a stronger bond, as it is designed for through hull applications. There really isn't a lot of water pressure that will be going on where you are planning to use the product. With that in mind, I would prep the surface really well by scuffing it with a heavy grit sand paper and cleaning it with acetone or alcohol, and I would go with the Goop because of its great flexibilty when cured.

[prowlerdude]

Ive used both and have been happy. The only drawback I had with the white 5200 I used was the mess. It was my first instalation and add the spaz factor... My beads were not up to par and it showed.

[Siebler]

Originally Posted by prowlerdude

Ive used both and have been happy. The only drawback I had with the white 5200 I used was the mess. It was my first instalation and add the spaz factor... My beads were not up to par and it showed.

Yeah 5200 is a pain. If you go this route wear gloves. trust me.

Both products work well but if you plan on using the sonar within a week or so I would go Goop as it cures faster. 5200 takes a long time to fully cure all the way through (even the fast cure stuff takes a while).

[dtownfan]

thanks for the info! i have a tube of marine GOOP here at the house and wanna give it a shot. i will post pics when i finisher her up. i spent the day making a home for the new yaks so i have not even started the contour carving for the wet mount. this weekend me make the trip to farmville va to get my 135 ride......went for one and picked up 2! i bought my wife a Tarpon 100 and a carbon manta ray paddle. when the wife is happy, i am happy'er!

[Billy V]

If you use the 3m 5200 do Not use alcohol to prep the area. It will prevent the 5200 from curing.

[Iceman]

I would prep the surface really well by scuffing it with a heavy grit sand paper

Crucial! I don't bother with the acetone.

[dgax65]

The 5200 worked very well on my transducer wet mount. I managed to get a relatively neat bead completely around the bottom of my mount without getting the sticky white crap all over things like I did in the past. I let it cure for about a week (it rained all week, so there was nothing to lose by waiting). As far as I could tell, the 5200 made a perfect seal with the hull. I had roughed up the hull with sandpaper and it adhered well. For this type of application I think that 5200 is superior.

BTW: While the 5200 worked great, I didn't get enough Goop on the side seams to get a really good seal. The second time out, I dropped the kayak getting it off the truck and I popped one of the seams. It wasn't a big leak, but my transducer was nearly uncovered by the time I got ready to launch. I had adequate sonar performance most of the time I was on the water, but my readings were a little spotty when I was rocking in the swells. I said when I started making the wet well that I would only give it one chance and would tear it out if it wasn't perfect. Well, it got two chances and I had to get rid of it. I could have tried Gooping all the seams again, but that would have been a pain in the ass with no guarantee of success. I was eager to get back out to fish the next day so I pulled the whole thing and went with a Goop-to-the-hull mount. Either I did a better Goop job that I've ever done before or I just selected a better location. The Goop mount is giving me very good readings. I was metering the canyon down to 583ft in 200khz. I'm not going to bother with a through hull until I have to replace my head unit (Lowrance LMS 527C DG iGPS). That unit is no longer in production and the best price I can get for a compatible thru-hull is $394.
http://www.lei-extras.com/store/sear...ProdNum=106-79
If I move up to a Lowrance HDS FF I'll spend the money for a thru-hull.