Deck to coaming - what sealant?

[lesweeks]

I want to seal the gap between the deck and the cabin and hatch coamings (all wood).
I suspect a bit of flexibility is a necessity here and I also want to be able to form a bit of a fillet. I have to admit being confused by polysulfides, polyurethane, silicone etc. Can someone point me in the right direction please.

I intend putting a harwood moulding over this afterwards. Same sealant?

And what about bedding down the toerails and the rubbing strakes?

Suggestions will be appreciated.

 

[Woodlouse]

Sikaflex 291 if you want it to stay there forever.

Arbokol 1000 if you ever want to dismantle it without too much damage.

 

[Keith 66]

Or if you want a cheap oil based mastic that lasts really well & stays soft use EVO Mastic.
Dont use silicone rubber if you are going to paint or varnish round it or if you dont want it to leak!

 

[DoubleEnder]

And dont put

a moulding over the joint. Try to give the mastic a profile such that it sheds water. A moulding on top just traps moisture
Graham

 

[Seanick]

No Silicon
Sika is evil
Oil based mastics dry and leak
It has to Butyl rubber (Arbomast BR) Ever flexible and at 3.50 a tube good value.

 

[lesweeks]

Thanks for all the advice and suggestions.
Nick, I couldn't find Arbomast BR for £3.50. You must know a man......
Les

 

[Jean]

Sikaflex 252 is both a flexible sealant and an adhesive. Just used it on camper van, and very pleased with it. Ebay supplier, £20 including postage.