Brightwork - GRP sealant ?

[dunkelly]

I met a guy who had the most beautiful brightwork on an endurance at the folly a few years ago . He mentioned something about a barrier between his teak rubbing strake and the grp hull prevent the the usual water ingress and eventual fail of any varnish applied . Unfortunately my advancing age( and possible not paying enough attention) has allowed me to forget what this product was , not sure if it was an overpaintable product or a post varnish application . Has anyone heard or know what it may be or an alternative solution to stopping this problem re-ococcuring?

 

[Pye_End]

International Clear Wood Sealer Fast Dry?

 

[dunkelly]

How does that stop the ingress in between the two different materials . As I read it it just coats the wood and the problem is the tiny gaps where water finds its way passed

 

[Tranona]

The rubbing strake should be bedded in sealant against the hull, I have very similar teak rubbing strakes and AFAIK know there is no "magic" potion different from ensuring that seal is sound and varnishing right up to the grp covering the thin line of exposed sealant.

This is my boat I did last year back to teak and 5 coats of International Woodskin. 20 years experience of doing the same on my previous similar boat does not lead me to think that the coating will degrade through water ingress at the junction of the teak to the GRP.

 

[dunkelly]

Unfortunately I think whoever fitted the rubbing strake didnt make sure enough sealant was coming out and there are some small gaps between the hull and the inside of the strake . Just hoped with modern tech there may be something !

 

[Tranona]

Mask it off, rake out any loose sealant and fillet in new sealant. Clean and degrease about 2mm either side of the joint and use something like CT1 in colour of wood or white. Force it into the gap with a lollypop stick (you can buy from craft shops) to form a radiused fillet and remove the tape immediately to leave a clean edge. Leave to cure for a couple of days and then varnish the wood running up into the fillet. Bit like going round the edge of a bath at home.

If you look closely at the top left in the photo where the white filler panel joins the coachroof, that is filleted white CT1 applied as I described.

 

[dunkelly]

Many thanks