First time aluminum boat owner here. The previous owner upgraded the transducer and did a real nice job mounting it on a block glued to the transom. But I don't really like the looks of the sealant around the previous screws from the original transducer. If this were a fiberglass boat I would be using 5200. Is that what I want to use here? Or is there something better for aluminum boats?
TinBoats.net
The original aluminum boat site!
Below the waterline sealant for screw holes?
- Thread starter rpt50
- Start date
Help Support TinBoats.net:
5200 below the water line. 4200 above. 5200 is near permanent. 4200 you can get the screws back out.
- Joined
- Oct 1, 2011
- Messages
- 524
- Reaction score
- 319
- LOCATION
- SoCal
I always use Life Calk Polysulfide for anything underwater. Been using it for over 30 years on sail and power boats. IMO, 5200 is too permanent.
- Joined
- Feb 18, 2009
- Messages
- 2,401
- Reaction score
- 2,269
- Location
- Perrysburg Ohio
- LOCATION
- Perrysburg Ohio
That was great stuff, just takes to long to cure....my old Lyman was sealed up with that stuff...never had an issue after.
- Joined
- Oct 1, 2011
- Messages
- 524
- Reaction score
- 319
- LOCATION
- SoCal
Specs on Life Calk....I began using it as I had teak on my sailboats, then began using it on many other items.....deck hardware, railing, etc. It's very versatile.
Per Boat Life:
"A long lasting, permanently flexible marine polysulfide sealant which can be sanded, painted***, and used above and below the waterline. Tack-free in 1 to 3 days, excellent resistance to teak oils, gasoline, and diesel fuel. Ideal for teak decks, to bed deck and hull hardware, seal thru-hull fittings, and underwater seams. Will bond to fiberglass, wood, metal, glass, and itself. Cures to a firm flexible rubber seal with excellent waterproofing and adhesion qualities. Can be applied underwater for emergency repairs. Can be applied to damp surfaces."
Per Boat Life:
"A long lasting, permanently flexible marine polysulfide sealant which can be sanded, painted***, and used above and below the waterline. Tack-free in 1 to 3 days, excellent resistance to teak oils, gasoline, and diesel fuel. Ideal for teak decks, to bed deck and hull hardware, seal thru-hull fittings, and underwater seams. Will bond to fiberglass, wood, metal, glass, and itself. Cures to a firm flexible rubber seal with excellent waterproofing and adhesion qualities. Can be applied underwater for emergency repairs. Can be applied to damp surfaces."
thill
Well-known member
Life caulk or 4200 for me…
If possible, I install solid rivets into any holes under the waterline, no sealant needed
If possible, I install solid rivets into any holes under the waterline, no sealant needed
