Happy Jax 3 Posted November 24, 2007 Share Posted November 24, 2007 We have just had out boat lifted out for the winter season, this is the first lift since it was purchased earlier this year. It is an ex Castle Craft hire boat (GRP) approx 9 years old. On washing down the hull, I have noticed that it appears to have std blue antifoul around the water line. However, underneath it has a black substance, almost tar like, but dry to the touch. Have not seen this before. Is this normal practice by the boat yards? If so where can it be purchased? I assume it must be cheaper than normal fresh water antifouls. I also have a concern regarding being environmentally friendly, If it is not the case can I cover it with a fresh water antifoul? Any advice would be very much appreciated. Quote Link to comment Share on other sites More sharing options...
Morris Man Posted November 24, 2007 Share Posted November 24, 2007 Hi Col & Lou, it sounds like you have tar varnish under the waterline, this was used on all the old wooden boats the other finish it could be is bitchamum paint, both paints are about £15.00 for 5 ltrs, we mhave used both of these on our boat for the last 12 years. Hope this helps Robin. Quote Link to comment Share on other sites More sharing options...
jillR Posted November 24, 2007 Share Posted November 24, 2007 hi col & lou ive found the best way to deal with tar varnish or bitchamin is to work from the keel out using a long handled radiator roller if you need to take a long break, you can submerge the roller in water then roll it off on wrag when you need to continue. you can lower a narrow board into the can to act as a roller board rather than using a tray. jill Quote Link to comment Share on other sites More sharing options...
petersjoy Posted November 24, 2007 Share Posted November 24, 2007 Hi, if you want to know exactly what it is call and see alex (ex castle craft) now at the chandlery in bridge stores at Loddon, i'm sure he'll be more than happy to advise you. Paul. Quote Link to comment Share on other sites More sharing options...
Happy Jax 3 Posted November 25, 2007 Author Share Posted November 25, 2007 Thanks all for the advice. Tar varnish or Bitchamin does not seem very environmentally friendly. Or is it? Although I don’t think any antifouling is. Thanks for that Paul, I did not know that Alex now had the chandlery at Loddon. Must give him a call. Does anyone have the number? Quote Link to comment Share on other sites More sharing options...
petersjoy Posted November 25, 2007 Share Posted November 25, 2007 Sorry left the flyer he gave me on the boat but heres the number for bridge stores, i'm sure they will pass it on 01508 520669 Paul. Quote Link to comment Share on other sites More sharing options...
Jim Posted November 25, 2007 Share Posted November 25, 2007 Hi there, Black tar varnish is quite common on Broads boats and also not particularly expensive either. From what I'm told, it's pretty effective as anti foul in the Broads environment and most people that use it finish off the water line with a suitably coloured anti foul rather than have black showing above the water line. It is a bitumen based product but isn't considered harmful to wildlife when dried. Hope this helps Jim Quote Link to comment Share on other sites More sharing options...
Happy Jax 3 Posted November 25, 2007 Author Share Posted November 25, 2007 Thanks for that Jim If it is black tar varnish I will probably continue with it. It certainly kept if clean. Quote Link to comment Share on other sites More sharing options...
Happy Jax 3 Posted November 25, 2007 Author Share Posted November 25, 2007 Thanks Paul I will give it a try Quote Link to comment Share on other sites More sharing options...
petersjoy Posted December 11, 2007 Share Posted December 11, 2007 Got his details here now. phone 01508521880 Email castlecraftltd@aol.com Paul. Quote Link to comment Share on other sites More sharing options...
jillR Posted December 12, 2007 Share Posted December 12, 2007 if you use tar varnish try not to get it on your skin as it burns and leaves a nasty red sore patch hence the long handled roller jill Quote Link to comment Share on other sites More sharing options...
Happy Jax 3 Posted December 12, 2007 Author Share Posted December 12, 2007 Thanks for that Paul. I will give Alex a call. Jill thanks for the advice I will proceed with caution. Just got out of hospital, I definitely don't want to be going back in. Col Quote Link to comment Share on other sites More sharing options...
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