Some years back a friend asked me to look at a motor bike tank that was leaking, he had bought some petseal to do it. & applied it about a year before. Now the tank came of an old two stroke so had oil residue in it. The petseal is nothing more than cheap polyester resin with some glass fibres thrown in. The claim that is "carbon fibre" is ********, carbon fibre is black, glass fibres are clear. Polyester will not stick to steel more than a mechanical bond & certainly wont stick to oily steel or fibreglass.
The stuff is nothing but over priced snake oil.
On a related theme a bloke i know owns a large 65ft motor yacht, now she was grp & had built in fuel tanks, at about 2 years old they started getting engine trouble with fuel filters clogging up quickly. It got so bad the boat became unusable. It turned out the builders had used a tank sealer (unknown make) from new & the diesel had broken it down. The main tanks were outside the two engines & to get at them the superstructure had to come off, large part of the accomadation removed & engines come out before the tanks could be cut open & fixed. A heavy court case ensued & iirc the yard nearly went bust over it.
The stuff is nothing but over priced snake oil.
On a related theme a bloke i know owns a large 65ft motor yacht, now she was grp & had built in fuel tanks, at about 2 years old they started getting engine trouble with fuel filters clogging up quickly. It got so bad the boat became unusable. It turned out the builders had used a tank sealer (unknown make) from new & the diesel had broken it down. The main tanks were outside the two engines & to get at them the superstructure had to come off, large part of the accomadation removed & engines come out before the tanks could be cut open & fixed. A heavy court case ensued & iirc the yard nearly went bust over it.
