[andrew001]

WaterWeld™ will plug or seal leaks and patch holes and cracks in almost anything. Ideal for repairing plumbing, fuel tanks, tub and shower, drains, pool and spa, boats and potable water tanks; setup occurs even under water. After curing, it can be drilled, tapped, filed, sanded and painted. WaterWeld™ has a set time of 15-25 minutes and sets hard in one hour. WaterWeld™ cures to an off-white color, is rated at a tensile strength of 1300 PSI and will withstand temperatures up to 300ºF.

[kavindave26]

[whitewillows55]

[vfdsaq]

I'm currently using tons of the metallised version repairing small holes in the floor of my van and cracks in the steel on the roof.

[Zeerover]

Step away from the superglue ? more

[NewLibertyStandard]

Many Thanks for the responses.
A) I fully understand the idea of drilling holes but the unit is a double glazed item on the slightly sloping cab roof.
drilling a hole would mean the hole would also need sealing so at this stage I will apply the Araldite Crystal to the crack and monitor it here

[Fecn]

Trying to repair a crack on plastic casing on a everstart 12 volt battery after trying to connect something to the right terminal that didn't fit properly. Did some research ans decided to give JB weld a shot because from what I've read so far it's supposed to be resistant to acid and will bond to plastics, but during and after application it began to bubble up in some areas so I'm wondering if it wasn't the right thing to use? Or is the plastic the battery case is made out of not compatible with epoxy? Reasons why JB weld appears to be bubbled in some spots? Or really just any other suggestions on different methods for repair? here

[devondad93]

However, you have to be aware that it's a temporary solution - epoxy isn't acid proof, once it's leaking it will eventually eat away at any repair you do. A drip will eat through bodywork and vital components, whereas a crack could lead to a catastrophic failure of the battery. Battery acid all over your engine compartment will lead to expensive repairs, for me it's better to bite the bullet and replace the battery.

[ribuck]

Had experience trying to repair damaged battery cases, splits, punctures etc. more

[Essjay]

A replacement block is the cure.

[rodneymason]

You can seal all the block cooling system connections using simple plumbing connections, hoses, plugs etc. here

[playanaut]

In general terms, if it's cracked on the outside, it is usually cracked on the inside. Also, cracked blocks cannot be welded unless the block is first placed in a kiln and heated to nearly a dull red first, welded and put back into the kiln so it can be slowly cooled. [links]

[bitboy]

If you want to try to seal the cracks by any method, after your "fix" you'll need to pressure test the block to about 10-15 psi or so. here