3M 4200 substitute for "above waterline" ?

[bzajdek]

Looking to put on some hardware on the hull of my 13' whaler clone. I don't have any 3M 4200. I have checked local hardware stores and they only have 5200, is there a substitute I can get away with so I can get my boat in the water? example GE 100% silicone, maybe?

 

[Yacht Dr.]

Re: 3M 4200 substitute for "above waterline" ?

Hello m8..

No sillycone please..

What kind of hardware ? cleats, vents, rail bases .. ? You said hull .. so if its below the waterline use 5200.

If its small based hardware 5200 will be fine.

YD.

 

[getusummm]

Re: 3M 4200 substitute for "above waterline" ?

I prefer the 5200 anyway. The 4200 will turn yellow, the 5200 will not. They also make a 5200 quick dry formula. I have found small tubes at Lowes and Home Depot. West Marine carries the larger sizes.

 

[Mark42]

Re: 3M 4200 substitute for "above waterline" ?

The other brand of marine sealants is Boat Life. Check for Boat life Boat Seal for above the water line sealing. I have used it on cleats, and a couple of years later, when I wanted to change the cleat, it did come off without ruining the gel coat. Some stayed behind, but it was easy to scrape off with a razor blade. Its clear, a polysolfide and industrial silicone combo specifically for marine use. It stays soft, but doesn't come off easy. I also used it to seal the motor bolts on the outboard in 2003. Still sealing good.