With Noxite, any Siplast granule-surfaced sheet
can reduce atmospheric pollution.
Depolluting Roof Membranes
Of the countless atmospheric pollutants
released daily, there is one that you can
help reduce simply by choosing the right
roof membrane. Nitrous oxides (NOx) are
irritating gases that are harmful to health,
facilitate the formation of low-level ozone,
and increase the greenhouse effect.
Neutralizing NOx in the air we breathe can
be accelerated with Siplast Eco-Activ Roof
Membranes surfaced with Noxite Granules.
The pace at which NOx pollutants are
increasing, primarily due to transportation
and industry, exceeds the pace of natural
NOx degradation. Siplast Noxite Granules
increase the speed of NOx degradation
significantly, transforming harmful molecules
into a non-hazardous nitrate salt.
How does Noxite technology work?
Siplast Eco-Activ Roof Membranes are
surfaced with roofing granules treated
Noxite, which is based on titanium
dioxide (TiO2) in its anatase form, is a
photocatalyst. A photocatalyst reacts in
the presence of UV light. When sunlight
hits an Eco-Activ roof, Noxite absorbs
UV light and essentially behaves
like a photovoltaic cell, generating
electrical charges that accelerate the
transformation of NOx molecules into
harmless molecules. By-products from
the decomposition of NOx molecules
are carried away by rainwater. These
by-products have no measurable impact
on the quality of run-off water.
How do we know Noxite works?
• Siplast has achieved a UL
Environment claim validation for
Eco-Activ Roof Membrane’s ability
to remove an estimated 417-4,143 g
NOx per roofing square over 20 years.
• A study conducted by the Department of
Analytical Chemistry at Munich Technical
University confirmed the catalytic effect of
Noxite Roofing Granules. Other references
include: CSTB Pass’ Innovation Final
Report: No.2009-016, for Eco-Activ
Waterproofing, and Characterization of
Gas Polluted Phase in Contact of Materials
Made by Icopal, CNRS.
• The principle of photocatalysis of
titanium dioxide was first demonstrated
in the 1970s. Since then, other building
products manufacturers have adapted
this technology for their products,
including concrete and tile. Siplast is the
first commercial roofing manufacturer in
North America to do so.
How long does Noxite’s
depolluting functionality last?
The TiO2 is not sacrificial. Because the
newly-created harmless molecules
behave like free radicals and react
immediately with another NO or new
NO2, the photocatalyst is released
unchanged. So, Noxite continues to
work throughout the life of the roof
How effective is Noxite?
Yearly, 200 squares (20,000 square feet)
of Eco-Activ membrane surfaced with
Noxite Granules offset the nitrogen
oxide pollution (NOx) produced
by more than 50 passenger light
vehicles.* Offset rates differ by location,
due to variances in prevailing atmospheric
conditions and UV levels.
What’s the performance history
of Eco-Activ Membranes?
Eco-Activ is the designation given to
any Siplast cap sheet surfaced with
Noxite granules, including time-tested
Paradiene 30, Paradiene 40, Parafor 50,
and Parafor 30 finish plies. The composition
of the sheets is unchanged. So you can
be assured of the same high performance
waterproofing you have come to expect
from Siplast Engineered Roof Membranes.
All FM Approvals, Underwriters
Laboratories Classifications, and
regional and local approvals for Siplast
cap sheets surfaced with mineral
granules apply to Siplast Eco-Activ
1000 Rochelle Blvd.
Irving, Texas 75062
201 Bewicke Ave., Suite 208
North Vancouver, BC, Canada V7M 3M7
Customer Service in North America
Eco-Activ Roof Membranes
The Noxite process –
from harmful NOx
compounds to clean air
* Based on studies using estimated conditions (sunlight,
humidity, and NOx) for Los Angeles, and mileage of the
average U.S. household vehicle (11,300 miles).