Air lock grommets

[baggyray]

Due to the wildly fluctuating temps in my brewery (aka kitchen aka Ice Station Zebra :lol: )...I intend to use aquarium heaters in my fv.
Can anyone suggest a supplier of the air lock grommets required ?..the only ones I could find wanted £2.50 postage for a 50p grommet
Also,what is the safest sealant to use to close the grommet/cable gap ?

 

[Peapodmaster]

get them from your LHBS. they should be about 40p. as for sealing.. i just used superglue. there are various methods i recon though.