Freedom K-4 Natural Cement
Freedom Cement, LLC
70 East Brookfield Road
North Brookfield, MA 01535
Natural cement was developed and widely used in
the pre-Portland cement era. This natural material
is produced by burning argillaceous limestone at
moderate temperatures. Natural cements have a
long standing performance record for high
durability in harsh environments.
Freedom Cement, LLC has come to the
architectural preservation and special use markets
with a natural cement product that is produced
with the same simple purity and performance of
the original natural cements of the 19th century.
The modern ASTM C-10 specification addresses
the characteristics of natural cement when it was a
more “processed” material in the mid 20th century.
ASTM C-10 does not address the performance
criteria of the material as it was produced for its
widespread use during the 19th century. K-4
Natural Cement conforms to the modern ASTM C-
10 certification with the exception of initial set time,
which is true to natural cement’s 19th century
performance. Freedom K-4 Natural Cement is the
“natural” choice for restoration and preservation of
historic masonry structures originally built with
similar material composition.
With the lower burn temperatures of natural
cement relative to Portland cement, the energy
consumption during production is greatly reduced
making natural cement the more environmentally
conscious masonry binder choice for historic
and/or modern construction.
Freedom K-4 Natural Cement is recommended for
use in historic architectural preservation masonry
applications as an authentic match to existing
natural cement materials. As well, it can be used
for modern new construction special uses such as
marine environments, low-embodied energy
needs, etc. Uses can be as the binder in mortars,
stuccos, grouts and concretes.
Depending on the purpose for its use, Freedom K4
Natural Cement may be used in Division 3 –
Concrete and Division 4 – Masonry applications.
Freedom K-4 Natural Cement is produced using
carefully selected raw materials from the same
quarries as the original natural cements from the
19th and 20th centuries. Processing is performed
under exacting manufacturing standards to assure
the best possible quality. Freedom K-4 is
completely pure natural cement and no gypsum is
added to the product.
Freedom K-4 Natural Cement is available in
40 lb. pails up to 2,500 lb. bulk super sacks.
Freedom K-4 Natural Cement is a moisture
sensitive material and must be stored under dry
conditions to ensure quality. Protection from moist
and/or wet conditions is critical to the performance
of this material.