Top Seals and Primers
Nullifire has its own unique range of decorative top seals and
corrosion resistant primers to offer the complete decorative protective
solution.
PROTECTION – AND
DECORATION
System S intumesent basecoats provide a durable and attractive
surface, similar to a paint finish. However, in a fire they expand
to many times their original film thickness. This provides an
insulating foam-like coating or ’char’ to protect
steelwork against heat build-up and the effects of fire.
Nullifire
System S Basecoats form part of a 3-layer system which consists
of :
 Primer
To protect the steel against corrosion and prepare the surface.
This provides a key for the application of the basecoat.
Basecoat
Applied to a measured thickness to provide the specified level
of fire protection.
Top Seal
A hard decorative finish to seal in the basecoat and provide an
attractive, high quality appearance.
PRIMER AND TOP SEAL COMPATIBILITY
It is vital that both the Primer and Top Seal are compatible with
the Basecoat to ensure the integrity of the system in terms
of fire performance and longevity. A fully tested range of Nullifire
Primers and decorative Top Seals is available. For details,
see:
In addition, Nullifire has tested and approved
a range of general primers and top seals for compatibility with
System S Basecoats. It is vital to check over-coat periods and
other relevant data with the coating manufacturer. It is advised
that a primer and top seal compatibility check is carried out
prior to application. If you have any concern regarding the compatibility of specific
primers or top seals with System S Basecoats, please contact Nullifire
Technical Services Department.
APPLICATION
System S Basecoats are ready for use (requiring
no thinning) and easy to spray. Conventional airless manual or
automated spray
systems may be used. They may also be applied by roller or brush,
using a ‘laying on’ technique to avoid heavy brush
marks.
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