MasterCast R 3934 - Set-retarding liquid admixture specifically designed for use with mortars
What is MasterCast R 3934?
MasterCast R 3934 is a powerful retarder for
use with mortars. It delays the hydration process
resulting in controlled extensions to the initial
and final setting times. It can be used to improve
workability without the addition of extra water, or
to allow reductions in the free water content. Due
to improved dispersion of the cement particles
the process of hydration proceeds under the
optimum conditions, leading to improved
strength characteristics with or without reduction
in free water.
What is MasterCast R 3934 used for?
MasterCast R 3934 has been formulated to be
used in combination with MasterCast AE 3998
to produce high-quality retarded mortars.
Mortars produced using these two admixtures
can be used for laying bricks and blocks; for
stucco/plaster (scratch and surface coats) and
any application where extended workability
combined with long-term stable air content is
What are the benefits of MasterCast R 3934?
- Increases compressive, tensile and flexural
strength of mortar
- Increases density of mortar reducing
permeability and thus increasing durability
- Allows a reduction in free water in the region
- Enables controlled extension of initial and