recommended bedding compound/sealant for port lights

[pcatterall]

The old compound is cracked and leaks on several windows.
I re-bedded one with that (butyle?) stuff that comes on a tape backing and has been great for deck fittings.
Even in the warm med I found it a bit too stiff so the layer of bedding is thicker than I wanted ( it doesn't leak but doesn't look too good!)
What is the recommendation for this task please will it have a decent shelf life when opened or do we have to tackle them all together?
Thanks

 

[oakleyb]

Someone recently mentiond they swear by neoprene glazing tape . I may give this a try over winter

 

[PaulRainbow]

The old compound is cracked and leaks on several windows.
I re-bedded one with that (butyle?) stuff that comes on a tape backing and has been great for deck fittings.
Even in the warm med I found it a bit too stiff so the layer of bedding is thicker than I wanted ( it doesn't leak but doesn't look too good!)
What is the recommendation for this task please will it have a decent shelf life when opened or do we have to tackle them all together?
Thanks

Butyl sealant in a cartridge, such as http://www.arbo.co.uk/arbo-sealants/arbomast-br/

Gets messy if you let it get out of control, cleans up easily with automotive panel wipe.

 

[Boathook]

Butyl sealant in a cartridge, such as http://www.arbo.co.uk/arbo-sealants/arbomast-br/

Gets messy if you let it get out of control, cleans up easily with automotive panel wipe.

Agree with Arbomast BR above and below the waterline. Tube stays usable for around a year if the end is sealed up well.

 

[PetiteFleur]

I've used the butyl glazing tape as used in window glazing. Had some left over from building an extension in 2012 and it's still in good condition. Used in re-bedding Aluminium window frames onto the grp. Also used for bedding in skin fittings. Excellent stuff and not at 'Marine' prices. I got it from Reddiseals.com

 

[pcatterall]

Thanks all,
I have 'gone for the Arbomast BR as the glazing tape sounds similar to what I have on board

 

[Yngmar]

Butyl tape works well, but you must learn how to use it properly. You apply it, then compress it, wait a few hours, then tighten further, repeat. The surplus will slowly ooze out and after a few days you can then cut off the squeeze-out. It never sets. It's a multi-day process and is unsuitable for anywhere with an exposed edge, as the edge will attract dirt and look icky soon. It does create an excellent seal that can cope with thermal expansion and even slight movement.

Neoprene gaskets or tape work well too and are used in production boats where nobody has the time to deal with the above procedure. My portlights and hatches from 2001 were all bedded with some kind of foam gasket and none of them leak.

 

[mariadz]

We used sabatack on ours four years ago and have had no problems since.

https://mariadz.com/2013/09/06/i-cant-stand-the-rain-at-my-window/