Re: [VAL] Sealing seams internally

[Charlie/Betty Burke <cbburke@xxxxxxxxxxxxx>]

True,

Airstream does now use SikaFlex. The Ohio EPA got on them about airborne
pollutants from the Vulkem. They would have preferred to continue using Vulkem.
SikaFlex is supposed to do the job, but the jury is still out on it's longevity
compared to Vulkem.
Some form of internal sealant has almost always been applied during
construction. The riveted metal to metal joint does not have a sealant applied
to it and is not considered water tight. The natural movement of the metal would
break any such seal. The interior sealant is the primary water tight seal.
Vulkem, once applied and set is an extremely flexible, durable seal.

Charlie