well, there are three kinds..
the tacky chocolate covered stuff,
the stuff from large bodies of water,
and then there is a fuel additive..
we talk about #3.
Sea foam is a fuel additive used to keep fuel when storing, clean the fuel system, etc..
'99 VN750 with 8900 miles and growing (3,111 when I bought it 03-22-08)
Ear shave with Unipods
Drilled mufflers and degoat
N/C Street shield EX windshield
Jumbo Saddleman Highway Studded saddlebags
Willie and Max Saddlebag mounting kit
License plate turn signals
Home made sissy bar
Luggage Rack from Scoop http://youtube.com/user/99vulcan750
Don't know if it is imported to your country yet, but if it is, get some. It's really the best fuel additive, miracle in a can, period. Do a search here and read some of the threads and you'll be a believer soon.