[voucht]

Originally Posted by brainbug007

So would you guy say this would do the trick or do I need something thinner/thicker?

http://www.ebay.co.uk/itm/SOLID-RUBB...em3 cbc488410

The ebay product seems to be regular rubber. Be careful with non fuel-resistant rubber, it will melt with the fuel. This rubber is OK for water, but I don't think it is suitable for fuel. It has to be Nitrile or other fuel compatible rubber kind (but Nitrile is the most common).
Hope this will help.