Nitocote® SN508 Creme

(Previously known as Emer-Stop Creme)
Deeply impregnating, water-dispersed, iso-octyltriethoxysilane, thixotropic creme, water repellent and chloride ion protective, clear treatment for concrete.

Uses:

A penetrating, thixotropic cream designed to protect concrete
and masonry from both water and chloride ingress, while still
permitting water vapour transmission. Nitocote SN508 Creme
is particularly useful for impregnating the exposed surfaces of
reinforced concrete used in bridges, wharves, roads, on all
atmospherically exposed concrete buildings and structures.

Advantages:

• Outstanding penetration
• Chemically bonds to concrete substrates
• Optimum resistance to alkalis
• Drastic reduction in capillary water absorption
• Low volatility, no application wastage
• Allows water vapour transmission
• Thixotropic, can be applied in windy/elevated temperature conditions, even to vertical and soffit applications
• Easy to supervise; clearly visible applied material, easily measured material thickness
• Water-based, solvent-free, environmentally friendly

Description:

Nitocote SN508 Creme is a thixotropic, water-dispersed emulsion
of iso-octyltriethoxysilane for use as a penetrating water repellent
treatment for concrete. Being a reactive silicone-based product,
it chemically bonds with concrete and masonry substrates and
becomes invisible once dry. Its penetration and subsequent
chemical reaction with the concrete allow it to provide long-term
protection for concrete by significantly reducing the ingress of
liquid water and any dissolved salts that the water may carry.
The high concentration of active ingredient (> 80%) is unique
among other emulsion-type silanes.

One of the most aggressive agents responsible for the breakdown
of steel-reinforced concrete in marine or coastal environments
is chloride ions present in seawater and wind-borne salt spray.
Water-soluble chlorides are able to penetrate the capillaries of
unprotected concrete. When these chloride ions reach the
reinforcing steel, corrosion will commence. Over time, the
chloride-ion-induced corrosion may affect the reinforcement
steel’s structural integrity.

Nitocote SN508 Creme works by penetrating the capillaries of
the concrete, chemically reacting with the concrete to form a
continuous hydrophobic coating over the surface. This hydrophobic (water-repelling) coating prevents the ingress of
liquid water carrying chloride ions.

The high concentration of active silane in Nitocote SN508 Creme,
combined with the low evaporation rate of the product, allows
the maximum possible depth of penetration and protection to
be achieved. Unlike other types of silane treatments, Nitocote
SN508 Creme is highly visible at the time of application and
can be easily applied to vertical or overhead soffit applications.
The thixotropic nature of Nitocote SN508 Creme minimises
waste and ensures that all of the silane applied to the substrate
is available for penetration. This product application control is
particularly important in ensuring the product is not lost into the
environment, and can be used over waterways.

The highly visible nature of the product during application
allows an easy visual inspection to ensure that the
entire surface has been covered. A single application of Nitocote
SN508 Creme is usually sufficient. Application rates
for Nitocote SN508 Creme may vary from 0.25 – 0.44 litres/m²
depending on the porosity of the substrate. An application rate
of 0.25 litres/m² will be sufficient for high-quality off-form concrete
with a high density and low absorption. An application rate of
up to 0.44 litres/m² would be required for low-quality porous
concrete. On porous substrates, a second application may be
required.

After application, impregnated surfaces take on a whiteish
appearance, which clearly distinguishes them from untreated
concrete, providing a good visual indication of the uniformity of
the application. The application thickness of the impregnant
layer can be measured using a Wet Film Gauge. In response
to the concrete quality and application rate, the active ingredient
penetrates into the concrete within 30 minutes to several hours,
and the milky white cream layer disappears completely.

Typical penetration depth of Nitocote SN508 Creme on porous
concrete. 0.25 litres/m² gave 2 mm penetration. 0.44 litres/m²
gave 4 mm penetration.

Penetration Depth

Nitocote SN508 Creme is formulated to provide the greatest
penetration depth of the active ingredient into the concrete, and
thus providing optimum protection against the absorption of water
and harmful substances.

The tremendous penetration depth is a function of the thixotropic
consistency of Nitocote SN508 Creme, which ensures a long
contact time of the silane active ingredient with the concrete
surface. It is also a function of the high concentration of the active
ingredient. The penetration depth naturally also depends on
the quality of the concrete.

Product specification sheet

Manufacturer

Parchem Construction Supplies

Parchem Construction Supplies Pty Ltd is part of the Alesco Group and operates within the ‘Construction and Mining Division’. Alesco is a publicly listed industrial brands company who supply a diverse range of specialist industrial products in Australia and New