barmyfluid Posted August 18, 2020 Report Share Posted August 18, 2020 A few hull coating data sheets I've seen recently specify an alkaline degreaser as part of the prep. What are people using? I was thinking of plain soda crystals in hot water, safe and cheap, pH of around 11, would that do the job? Link to comment Share on other sites More sharing options...
Jen-in-Wellies Posted August 19, 2020 Report Share Posted August 19, 2020 Which hull coating data sheets are these? I've never seen, or heard of alkaline degreaser being used on any blacking for inland steel hulls. I may even have read the instructions on the tin at some time! Are we talking about anti-foul for GRP hulls, or something else? My concern with using anything that is going to be rinsed off is where is the rinse water going to end up? The cut, storm drain, sewer? In each case someone might have something to say about a high pH chemical ending up in it. Jen Link to comment Share on other sites More sharing options...
Momac Posted August 19, 2020 Report Share Posted August 19, 2020 10 hours ago, barmyfluid said: degreaser http://www.cloverchem.co.uk/2013/info/en/326_virosol_info.pdf which may be diluted with water and seems to work better when used with water or https://www.bmstores.co.uk/products/elbow-grease-all-purpose-degreaser-500ml-345773 which also works well with water and may be easier to obtain as it is sold in places like The Range , Morrisons and B&M . Link to comment Share on other sites More sharing options...
barmyfluid Posted August 19, 2020 Author Report Share Posted August 19, 2020 2 hours ago, Jen-in-Wellies said: Which hull coating data sheets are these? I've never seen, or heard of alkaline degreaser being used on any blacking for inland steel hulls. I may even have read the instructions on the tin at some time! Are we talking about anti-foul for GRP hulls, or something else? My concern with using anything that is going to be rinsed off is where is the rinse water going to end up? The cut, storm drain, sewer? In each case someone might have something to say about a high pH chemical ending up in it. Jen SML Vinyguard and Ballastic epoxy for a couple: https://www.smlmarinepaints.co.uk/files/library/files/DATA_SHEETS/Vinyguard_Silvergrey_88_AG.pdf I've never seen it as a requirement for standard blacking either, though I'd guess it's not immune. I would be wary of high pH or chemical runoff, that's why I thought soda crystals may be a good choice, they're pretty innocuous in the scheme of things, they're used in laundry etc. 1 Link to comment Share on other sites More sharing options...
Chewbacka Posted August 19, 2020 Report Share Posted August 19, 2020 (edited) I think sugar soap is an alkaline degreaser, I shall google it. added It is according to Wikipedia Edited August 19, 2020 by Chewbacka Link to comment Share on other sites More sharing options...
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