Bonded Liners / Bonded Liner
Witt Lining Systems’ flexible PVC tank liners offer many advantages over bonded
liners. These advantages can provide the benefit of a longer lasting liner
system with a lower overall operating cost.
The first issue with a bonded liner is the difference in co-efficient of
expansion between the liner material and the tank structure. By bonding a liner
to the tank the liner is no longer free to expand and contract at its own rate.
As the tank expands and contracts due to solution volume or temperature it
places stress on either the liner or the adhesive system which can lead to a
Second, most adhesives systems are limited to 145oF maximum temperature before
they begin to fail. This limits bonded liners to their application range as well
as subjects them to failure should there be a temperature imbalance. The very
same sheeting material, when made into a drop in liner can handle up to
continuous temperature exposure.
Third, a bonded liner requires a very clean profile for the adhesive system to
work properly. This often involves sandblasting, which involves either moving
the tank off line or timely and expensive tenting of the tank. A Witt drop in
tank liner only requires the tank be clean and dry. A Witt tank liner can often
by installed over top of an existing bonded liner.
Fourth, between surface preparation, bonded liner installation, and then
adhesive cure time, a bonded liner can take several days for an installation
before being able to be put into service. A Witt drop in liner requires no cure
time and can be used the second the liner is installed.
Fifth, bonded liners themselves typically require trained technicians to install
which can be very costly. Witt tank liners are often installed by facility
employees who can save considerable money.
Witt Lining Systems’ tank liners offer all of the above advantages over bonded
tank liners. The benefit to you is a longer lasting tank liner with a lower
overall operating cost.