Thru hull

[Jrato14]

Hi,
I needed to drill a 7/8 hole thru hull to run a new transducer. There was a 1/2 hole already there so I just made it bigger. The old hole was filled with I assume 4200 and the hole is above the water line but not by more than 6 inches. Should I fill the new hole with 4200 or marinetex

 

[crazy charlie]

If I understand you correctly, you have a hole that needs to be enlarged to accommodate a new transducer and you want to know what to seal it with?? Above waterline you can use almost anything.Silicone,4200,etc. A flexible is best.Marinetex would be a good choice to fill a hole completely.Charlie

 

[Jrato14]

If I understand you correctly, you have a hole that needs to be enlarged to accommodate a new transducer and you want to know what to seal it with?? Above waterline you can use almost anything.Silicone,4200,etc. A flexible is best.Marinetex would be a good choice to fill a hole completely.Charlie

Thank you so much

 

[JASinIL2006]

MarineTex (or PC11) or 4200. I would never use silivone.

 

[Chris1956]

Gee, a dab of silicone caulk and a clamshell cover is what is commonly used.

 

[Jrato14]

I’m a retired navy guy and coastie I look forward to using 4200 to reminisce lol

 

[Scott Danforth]

use fast-cure UV-4000. also use painters tape on both sides as a dam to keep it from oozing into the bilge before its cured...... (dont ask how I know)