Caulking, sealants

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bshillam

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1981
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Heaven To Me
A few minor projects that need to be finished. Question, I have replaced (or will be) the nav lights and originally the factory sealed holes with some sealant. This is in a non-cored area. What is the "standard" to use for sealant? Can it be picked up at Home Depot saving some dough?
Another question, the bead between the cockpit floor and cabin floor needs attention. Anyone know what was used and or should be used?
 
bshillam":1hvggd50 said:
A few minor projects that need to be finished. Question, I have replaced (or will be) the nav lights and originally the factory sealed holes with some sealant. This is in a non-cored area. What is the "standard" to use for sealant? Can it be picked up at Home Depot saving some dough?
Another question, the bead between the cockpit floor and cabin floor needs attention. Anyone know what was used and or should be used?
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5200! :wink:
 
I am really careful with 5200 as it is really permanent. Few boat fittings are permanent. For general sealing, no load situations, fibreglass to fibreglass joints, many products are suitable. I have found boatlife products generally don't yellow as much as the 3m. I use lifeseal a lot a mix of silicone and polyurethane. Also sika flex 421 or others that are non permanent. 3m 4200 is good for many all around apps. Both of your jobs are sealing only. No load so pretty simple. Enjoy.
 
3M 4000 is good as its less aggressive than 4200 or 5200 and has more UV protection .
Marc
 
Agree with Marc. The 4000 is not affected by UV. If you go to the product sheets, it actually is a better sealant than 4200, and in some cases better than 5200 quick set. But I have not seen 4000 in the big box stores yet.
 
Bought 3M 4000 at West Marine. Used it to reseal the bulkhead to the raised cockpit floor.
 
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