building the Heidi.

**PAR** · 23rd May 2013, 02:17 AM

Use a "Polysulfide" instead of a polyurethane for the lap sealant. 3M-101 is one of the few available. BoatLIFE 1033 and BoatLIFE 1034, are polysulfides, Joinsil 222 is another often found in aquarium stores. Make sure it says polysulfide and doesn't have the word silicone anywhere in the product description.

**Kingfisher** · 25th May 2013, 04:28 PM

I haven't been too successful in tracking down polysulfide (or polysulphide) in Australia. Does anyone have any hints?

**PAR** · 25th May 2013, 07:13 PM

There are two types of polysulfides - a single part, usually in a tube or caulk gun cartridge and a two part. The two part stuff is what is commonly used to seal the caulk lines on a traditional deck. It's not easy to work with, but is a superior product.

I'm not sure of what's all available there, but I've heard good things about "FixSeal+", which should be available at most marine stores (like Binks).

**Dry Water** · 27th May 2013, 07:54 PM

Yes, PAR's on the right course. I use Fixseal and am about to try Sikaflex 291 available from Bunnings and Mitre10.

**HELLICONIA54** · 27th May 2013, 08:23 PM

So,caulking with thick wool soaked in hot tar/pitch,is not the go?

**HELLICONIA54** · 9th June 2013, 08:58 PM

Ok,I guess Thanks to our learned members,I have things pretty much sorted BUT ONE.Has anyone actually built one? or know of one? I have looked everywhere inthe book,but there does not seem to be an average weight given.Can this boat be car topped? or an i in for yet another boat trailer?

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