DSM-DS is a unique, highly resilient, double silicone faced
precompressed sealant that has proved over the years to be able to solve
difficult joint sealing problems where other systems have failed or are not
suitable. As such, it is ideal for new installations as well as expansion
joint repair or retrofit jobs. Some examples of DSM-DS applications include:
• Wastewater
Digester Lids to Facilitate Methane Harvesting: DSM-DS has been
used as a digester-lid perimeter joint sealant at wastewater treatment
plants that harvest methane. Installed between the tank wall and the
digester lid, DSM-DS keeps the weather out while keeping the methane and
other gases in. The products ability to resist gas pressure depends on
the joint size and the expected pressure--consult EMSEAL.
See Jamaica WWTP Project Summary.
• Tunnel
Walls and Ceilings To Redirect Positive-Side Water Flow from the Negative
Side: Existing Tunnel Structures often leak at expansion joints due to
water draining through the surrounding ground and accumulating on the tunnel
lining. Few options exist for addressing structural expansion joints in this
situation. DSM-DS installed from inside the tunnel (the negative
side) has proved its ability to redirect the positive side water around the
tunnel lining where it can be manage to drains to filtered away in the
surrounding rock. The ability of the DSM-DS to effectively perform
this role depends on there being active shedding of the water to prevent the
accumulation of a head pressure--consult EMSEAL.
See Wheeling Tunnel Project Summary.
• Planter
Walls: Planters that are bisected by structural expansion joints
present a unique sealing challenge. The joint in the inside of the
planter must be sealed to prevent irrigation water from leaking out of the
planter into the structures below or adjacent. The outside of the
joint in the planter walls must be sealed to fill the joint aesthetically
and to keep the weather out. DSM-DS, because it can be customized in
depth to suit the thickness of the planter wall, and because the outer
silicone bellows can be supplied in any of 26 colors, can be made to
coordinate aesthetically with the finish of the outer face of the planter
walls. This means both the inside and outside of the planter can be
sealed in a single installation step.
• Foundation
Floors and Walls from the Negative Side: It is not uncommon for
existing foundations to leak at structural expansion joints. The
surest way to remediate this type of leakage is to excavate to expose the
foundation to address the waterproofing from the positive side. As
this is seldom practical, a solution from the negative side is often sought.
This conditions is very difficult to address especially where any sort of
head pressure is likely to build up.
DSM-DS alone has been
successfully used in many cases to stem the flow of water into foundations
where a perimeter drainage system on the outer side of the foundation wall
and floor is functioning. The perimeter drainage or some other active
drainage system (ex. pumps) is necessary to keep the blocked water from
building a head pressure against the back side of the DSM-DS.
• Containment
for Injected Polyurethane Grout: In some more difficult cases
where head pressure is likely to build and where active drainage is not
present, DSM-DS has been installed to seal off the joint gap and to act as
containment for polyurethane grout injected through the wall behind the
DSM-DS. The grout when subjected to water pressure is held in place by
the resilience of the DSM-DS.
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