MST Multi-Use Sealant Tape
features a major breakthrough
in sealant technology. The innovation comes in the composition of the
patent-pending acrylic adhesive infused into the cellular foam base
material. This new proprietary chemistry incorporates a hydrophobic
component never before available in a sealant formulation.
The result of a 3-year R&D project, EMSEAL
The result is a material
that features sealing performance significantly greater than any acrylic
impregnated predecessor. In addition, it is
odorless, clean handling, UV stable,
non-staining, and highly versatile.
EMSEAL MST Multi-Use Sealant
is a preformed expanding tape seal. MST
is made of a resilient cellular foam infused with a hydrophobic,
modified-acrylic, liquid adhesive sealant which is then compressed to a
sealing density level appropriate to the application. The result is a
hybrid sealant that features the best characteristics of foam and liquid
sealants while eliminating their respective weaknesses. MST
compresses uniformly without overspill to provide a lasting seal.
MST is available in
a wide variety of configurations. Users determine the size of MST
suited to their specific application and performance needs. Typically,
higher compression levels are required for watertightness in standing
water or water run-off applications; lower compression can be used, for
example, for snow seals at roof ridges (see compression chart on Page
MST replaces and outperforms liquid and butyl-tape
sealants as well as closed cell and unimpregnated open-cell foam
EMSEAL MST is packaged precompressed in rolls.
The material contains a pressure sensitive mounting-adhesive on one face
to facilitate installation.
MST sealant tape is used to
seal out dust, air, wind-driven snow, and moisture from joint details in
metal buildings, panels, roofs, and other building components and
assemblies. MST is ideal as a filler in expansion/compression
joints subject to movement from thermal expansion and contraction, and
as a gasket in mechanically fastened, non-moving applications.
MST can be used
against metal, plastic, wood, concrete, and other common building
• Clean handling, non-staining, odorless, UV-stable
• Resistant to bugs and vermin
• Will not extrude from between joints like caulk or butyl tapes
• Conforms to contours and fills gaps
• Maintains a seal during thermal expansion and contraction of building
• Good thermal and sound insulator
• No shrinkage or blow-out due to closed-cell breakage
1. Storage and Surface Preparation
Tape should be stored in a warm dry interior location. Ideal
application temperature is approx. 75°F (24°C). Expansion will be faster
at higher temperatures and slower at lower temperatures.
Tip: For faster expansion in cold conditions keep the material warm
before use and, if desired, apply heat from a hair dryer to installed
material to accelerate expansion. Joint faces should be dry and cleaned
of dirt, oils, grease, etc. There should exist sufficient depth to
receive full width of the sealant.
IMPORTANT: Reels must be stored FLAT and kept compact. Should material
expand in package it can still be used. Unroll material, allow it to
expand, then recompress it between surfaces to be sealed.