pegleg Posted June 8, 2013 Report Share Posted June 8, 2013 Does any one have any experience or knows how water absorbant the foam inside a modern boat hull is ? Quote Link to comment Share on other sites More sharing options...
Guest Posted June 9, 2013 Report Share Posted June 9, 2013 A 2 part liquid foam when mixed together in equal parts can expand up to 25 times its original volume and set rigid. It is extremely buoyant. 1 cubic foot will support 27kg in water and will bond well to most materials. It should always be protected by a GRP skin because, although closed cell and water-proof when set. It will absorb water when crushed. 1kg of liquid foam = 1 cubic foot when expanded under conditions of 18°c. Lower temperatures produce less foam. http://www.cfsnet.co.uk/acatalog/CFS_Catalogue__2_Part_Polyurethane_Foam_Liquid_415.html Quote Link to comment Share on other sites More sharing options...
duncan Posted June 9, 2013 Report Share Posted June 9, 2013 depends on the foam, and how it's getting in. most modern closed cell foams shouldn't 'absorb' water in the sense of getting wet, exposed etc, but then you have the issues associated with semi permeable membranes and water having to go somewhere! then there's encapsulated wood that ends up exposed over time and ends up absorbing water. most of the older 'problems' were associated with attempts to seal in open cell foams and one, or more, of the above problems. if you have a specific boat in mind then it would help to know which - then the appropriate specifics can be highlighted. Quote Link to comment Share on other sites More sharing options...
pegleg Posted June 12, 2013 Author Report Share Posted June 12, 2013 Thanks Duncan i will pass this on to my friend. Cheers Quote Link to comment Share on other sites More sharing options...
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