Painting the inside of a water tank?

I’m just about to refit the top with sealant and a new rubber gasket but I’ve noticed there’s no breather. I could add one but I guess it must have been ok without before. Much easier to add one now with the top off... but I won’t bother unless someone can talk me into it being essential?
 
Good job. Looks smart. I am guessing very similiar to the Sigmaguard I mentioned back on page 1, although it seems a little more costly.

Looks great.
 
ip485 said:
Good job. Looks smart. I am guessing very similiar to the Sigmaguard I mentioned back on page 1, although it seems a little more costly.

Looks great.
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When I suggested a WRAS approved product at #21 I had noticed that the Sigmaguard 585 you had suggested previously was one such, but I could not find it in smaller than 4 litre pots at ca. £60 plus VAT, whereas 1 litre of the Maxline I found was available and seemed likely to be enough for John's needs, at £37 plus VAT. If one was doing a bigger job - or if the Sigmaguard can be got in smaller quantities than I could find - the position would be different.

I hope that I did not incline John away from having a spare few litres of Sigmaguard that he could use on another tank - and out of interest I wonder if he can tell us if there was any of the 1 litre of Maxline left over. It certainly looks good and thick!
 
Hydrozoan said:
When I suggested a WRAS approved product at #21 I had noticed that the Sigmaguard 585 you had suggested previously was one such, but I could not find it in smaller than 4 litre pots at ca. £60 plus VAT, whereas 1 litre of the Maxline I found was available and seemed likely to be enough for John's needs, at £37 plus VAT. If one was doing a bigger job - or if the Sigmaguard can be got in smaller quantities than I could find - the position would be different.

I hope that I did not incline John away from having a spare few litres of Sigmaguard that he could use on another tank - and out of interest I wonder if he can tell us if there was any of the 1 litre of Maxline left over. It certainly looks good and thick!
Click to expand...
There’s a tiny bit left over, but I admit I wasn’t mean when I applied it as I slapped on two very generous thick coats. It’s pretty viscous stuff so not easy to apply thinly and I didn’t want to warm it as it would decrease it’s already fairly short working time. It does cure to a smooth glossy finish so it flows a little once it’s brushed on.
 
john_morris_uk said:
There’s a tiny bit left over, but I admit I wasn’t mean when I applied it as I slapped on two very generous thick coats. It’s pretty viscous stuff so not easy to apply thinly and I didn’t want to warm it as it would decrease it’s already fairly short working time. It does cure to a smooth glossy finish so it flows a little once it’s brushed on.
Click to expand...

Thanks. I guesstimated area from your photograph using your hand as a scale, but could not be sure. I thought the stuff might be rather like the (two coats) of a very thick epoxy product we applied to the hull years ago. It’s been great, and rollered on a large area was fine. But it had the consistency of a cheese fondue - so I did not expect quite the same finish as your varnishing.
 
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