Non marine bedding compound

[ianwright]

My wooden boat was built in the late eighties. Of the various bedding compounds used under deck fittings the one that has stood the test of time best is/was a grey builders mastic. Still soft but not sticky, (after 14 years) paintable after 12 hours and much cheaper than real 'marine' goop.
Naturally I can't remember what it was called, a pity 'cos now I need some more.
Any idea what I should look for in our local DIY shop?
I will NOT be using a 'marine' product or anything containing 'caulk' in its title.

IanW

<hr width=100% size=1>Vertue 203, Patience

 

[oldsaltoz]

G'day Ian,

Have a look in you local plumbing outlet, look at mastics used on roofing, this a lot a product I seem to remember using some years back on a roof sheeting.

I hope this helps...........

<hr width=100% size=1>Andavagoodweekend, Old Salt Oz /forums/images/icons/cool.gif

 

[snowleopard]

polyurethane mastic is available from builders merchants. it is the same as the marine version but a lot cheaper. sikaflex sell the same stuff to both markets, the price difference is a factor of 4!

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[Tradewinds]

Eagle Boat Windows tel:01756 792097 have a bedding compound which is as you describe. Was grey but I think is now white. I've used it - it's similar stuff that C&N used on their yachts. Afraid it had the dreaded 'M' word in its product name but is only £6 or so for a standard cartridge.

Good place for window/hatch repairs too.

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[vyv_cox]

When I was in the building industry many years ago we used grey stuff called "Butyl Mastic" for a range of sealing applications and it was extremely effective. A Google search on these words just pulled up 2400 hits, soi I guess it's still made.

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[yoda]

Another product with the came excellent properties is 'Seelastic' made by Simonize and available at good Moto Factors. At £4.50 a tube it is not cheap but it stands the test of time. I have tried others but always gone back to it as I haven't found a better sealant.

Yoda

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[BootleBumtrinket]

Sounds like a myth to me

About Sikaflex putting the same stuff in different tubes

I took the dried out bungs from a building mastic and one from Sikaflex and abused them generally over a few days: the sikaflex remained more pliable and more coherent

Also building mastics I've used are nowhere near as sticky as sikaflex, which is the stickiest stuff in the world in my experience

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[chippie]

I agree with Snowleopard, A polyurethane type sealant is probably what you are after, they are used in a wide range of applications in the building industry and stick to a wide range of substrates. Sticks like the proverbial, so be well organised when you apply it or it will end up on everything.

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[Plum]

Hello Ian, I had also been researching non-marine sealants. Thought you might be interested that Loctite do a product similar to the Sikaflex stuff called "loctite 5220" and it is available from RS (www.rswww.com) for GBP5.71 + VAT. I have not tried it but I have compared the elasticity and the tensile strength with the usual marine sikaflex stuff and it is similar. they are both moisture curing polyurethane.

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[Mirelle]

White lead paste

Unscrewed Mirelle's mushrom vent on the counter, 50 years after it was screwed on, and found the white lead paste under it still soft and sticky!

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[Adrian_Morgan]

Screwfix do an acrylic frame sealant (85p a tube). Works a treat, as does their 30 minute polyurethane glue. Fills gaps, sticks like ...

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[max_power]

Just as a a matter of interest

You state that your wooden Vertue was built in the late eighties.


Could I ask you if the hardwoods used in it’s construction came from renewable sources ?




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[ianwright]

Re: Just as a a matter of interest

>Could I ask you if the hardwoods used in it’s construction came from renewable sources ?<

Yes, you can,,,,,,,,,,,

IanW


<hr width=100% size=1>Vertue 203, Patience

 

[kds]

Re: Just as a a matter of interest

If max does ask you - perhaps it is because the resins, steel, aluminium and plastics = and energy to extract or manufacture them = which are used in his boat, all came from renewable sources ??
Or does he have another point ?

<hr width=100% size=1>Check out some pictures of my boat at;
<A target="_blank" HREF=http://www.canongrange.co.uk/boat>http://www.canongrange.co.uk/boat</A>

 

[Ecartar]

Have recently been advised of a Sikaflex clone called PU40. Regret no personal experience yet. Available locally here in Devon, but not yet had a chance to try it or do nationwide search. Throwing this three pen'orth into the pot in the hope it may be of value! Hope to report later.

Regards

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[max_power]

A Fair Point !

Life is all about making our own choices - and having to live with them.

When I ask boat owners who have had wooden boats built ( or built by themselves) recently, using hardwoods, if the wood came from renewable sources ,they either become aggresive or fudge the issue ( like Ian Wright has). They know very well that they have either contributed to the destruction of a wonderful future resource or helped prop up an inhuman regime. If I owned a boat like Ian Wright's I could just not sleep at night and I leave him to his own vanity and arrogance that the only boat worth having is a wooden one. Bugger the next generation.

So called sailors say they love the wildlife aspect of sailing but close their eyes when it comes to making decisions on hardwoods.

The globe is practically made of aluminium and metal raw materials. Fossil fuels are just a 'one off' non- renewable resource so they have no potential. The so called 'traditional' wooden sailors would not lower themselves to softwood/resin / cold moulded wooden boats that have a positive future. This is what gets my gander up.

Whenever this subject comes up , it is twisted into an energy issue exactly as you have done. As I say, I never get a straight answer.












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[paulrossall]

What sort of boat have you got and what is it made of?

You have not completed a profile of yourself and I find that most users who have not done so and who are asked for some details either become aggresive or fudge the issue.

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[ianwright]

A Straight Answer,,,,,,,

Well now, not that it’s any of your business what my boat is built of, but perhaps the general point needs an answer,,,,,,,,,,,,,,,,,,,

Patience is a Vertue (Gettit? Eh?) and was built for me as a training exercise at the International Boatbuilding Training Collage (Lowestoft).
She is rigged as a Gaff Cutter, weighs a little over five tons, has wooden (softwood)spars, an iron keel of two(ish) tons and is built of Iroko planks on oak frames with African ‘mahogany’ cabin sides, (book matched, very pretty,,,,,) and assorted plywood and soft wood ‘inside’, so we are concerned with lets say two tons of tropical hardwoods, the iroko and the mahogany.
What does a tree weigh? About three or four tons? So we are talking about one trees worth of timber would you say? Well fine. I have caused to be built a thing of great beauty whose life could be over a hundred years. At a guess five families could own and enjoy her during that life. A couple of score of students learnt a little of their trade in the building of her. A number of tradesmen will earn a little of their income from the care and maintenance of her.
I doubt that few trees have died in a better cause.

I understand that very few plank on frame boats are built these days (mores the pity) about ten to fifteen new boats a year in the UK. so country wide your perceived problem is not great.
I doubt if I have contributed much to any inhuman regimes,,,,,, (you are kidding, right?)
I suggest that your crusade might be better directed at slash and burn farming, Hamburger franchises, replacement window makers, garden furniture makes and buyers and the like. Might be better not to be rude to or about folk you don’t know either,,,,,,,,,,,,,,,,,,

IanW.


<hr width=100% size=1>Vertue 203, Patience

 

[ean_p]

Re: A Straight Answer,,,,,,,

good answer , especialy the last sentence.

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[rich]

Re: A Straight Answer,,,,,,,

Well said ian.as you can see, hermees is all hardwood,/forums/images/icons/mad.gif max eh!

<hr width=100% size=1>rich )