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Note: Strict compliance to
manufacturer's coating thickness must be adhered to meet fire-rating
A water-based, thin film,
one-component latex fire barrier coating containing 56.2% solids, by weight,
is designed to protect various substrates by developing a thick char barrier (intumescent
layer)
when exposed to high temperatures or flame.
PRODUCT CHARACTERISTICS:
The product is a white,
flat-finish coating with a nominal viscosity of 125 KU and a pH of 8.0 – 8.5.
APPLICATION EQUIPMENT:
The product can be applied
with an airless sprayer
(recommended psi
1,200 – 2,400, tip size 25 – 50, positive displacement) or by roller, brush,
or mitt.
Recommended thickness depends on the substrate
and the level of protection needed.
See test data for recommendations, or call the
manufacturer for technical assistance.
GENERAL:
The product polymerizes to all tested
substrates and accepts top coating with alkyd, acrylic, or latex
paint without loss of fire protective
qualities. The product meets the following requirements for:
Spray
Polyurethane Foam @ various thickness (see individual test reports)
·
ASTM E-84.98
(UL-723) Flame Spread & Smoke Production (extended to 25 minutes)
·
UBC-26.3 –
Thermal Barrier Test for Interior Foam Plastic Systems
·
NFPA-286 –
Contribution to Room Combustibility.
·
Toxicity Data
(Zero toxicity/No HAZMAT)
PROJECT CONDITIONS
Revise this Article if manufacturer's
requirements are more restrictive.
A. Apply
waterborne paints only when temperatures of surfaces to be painted and
surrounding
air are between
50 and 90 deg F
(10 and 32 deg C).
Delete paragraph and subparagraph below for
interior applications not subject to inclement weather conditions.
B. Do
not apply intumescent paints in snow, rain, fog, or mist; when relative
humidity
exceeds 85 percent; if temperature is less
than 5
deg F (3 deg C)
above the dew point; or to damp or wet surfaces.
INTERIOR INTUMESCENT FINISH COAT
1. Prime
Coat: Is not required, but if used, factory-formulated
Zinsser 1-2-3, Kilz, or similar
applied at spreading rate
recommended by manufacturer.
2. Intermediate
Coat: Intumescent-type, fire-retardant paint applied at spreading rate
of 20 mils wet
using multiple coats to
achieve a total dry film
thickness of 14 MILS (DFT).
3. Finish
Coat – For color or sheen applied according to manufacturer’s recommendations.
EXAMINATION
Always retain this Article. Before starting,
ensure that surfaces are in proper condition to receive
intumescent paint, or
failure is possible
C. Examine
substrates, areas, and conditions, with Applicator present, for compliance
with requirements and other conditions affecting
performance of work.
1. Proceed
with application only after unsatisfactory conditions have been corrected and
surfaces to receive paint are thoroughly dry.
2. Start
of painting will be construed as Applicator's acceptance of surfaces and
conditions within a particular area.
Before
applying paint, consult manufacturer to determine if there are potential
problems with use of intumescent paints over existing primers or previously
applied coatings. Coordinating shop-applied primers with intumescent paint is
critical. If problems exist, it may be necessary to provide barrier coats or
to remove existing material and reprime substrate.
D. Coordination
of Work: Review other Sections in which primers are provided to ensure
compatibility of the total intumescent paint system for various substrates.
On Architect's request, furnish information on characteristics of finish
materials to ensure use of compatible primers.
PREPARATION
Revise first
paragraph and subparagraph below if additional requirements are necessary to
suit Project.
E. General:
Remove hardware, hardware accessories, plates, machined surfaces, lighting
fixtures, and similar items already installed that are not to be painted. If
removal is impractical or impossible because of size or weight of item,
provide surface-applied protection before surface preparation and painting.
1. Make
sure the surface of the foam is free of gouges, holes, exposed cells, and that
the surface is stable and not crumbling or deteriorated.
If any such defects are found, repair them prior to proceeding.
2. After
completing painting operations in each space or area, reinstall items removed
using workers skilled in the trades involved.
F. Cleaning:
Before applying coatings or other surface treatments, clean substrates of
substances that could impair bond of intumescent paint systems.
1. Schedule
cleaning and painting application so dust and other contaminants will not fall
on wet, newly painted surfaces.
Always retain
paragraph and subparagraphs below that specify surface preparation. Proper
surface preparation is essential for satisfactory intumescent paint
performance. If necessary, revise requirements to include special procedures
requested by manufacturers or to suit Project.
G. Surface
Preparation: Clean and prepare surfaces to be painted according to
manufacturers written instructions for each particular substrate condition and
as specified. Coordinating shop-applied primers with finish coats is
critical. See "Coordination of Work" Paragraph in "Examination" Article. If
compatibility problems develop, it may be necessary to provide barrier coats
over shop-applied primers or to remove primer and reprime
substrate.
Revise
paragraph and subparagraphs below to suit products specified
H. Material
Preparation: Mix and prepare materials according to manufacturers written
instructions.
1. Maintain
containers used in mixing and applying paint in a clean condition, free of
foreign materials and residue.
2. Stir
material before application to produce a mixture of uniform density, and as
required during application.
Do not stir surface film into material. If necessary, remove
surface film and strain material before using.
3. Do
not thin or mix with other .
Delete paragraph below if tinting is not
required. Different tints will show through as topcoat erodes.
I. Tinting: Tint each undercoat a lighter shade
to simplify identification of each coat when multiple coats of same material
are applied. Tint undercoats to match color of finish coat, but provide
sufficient differences in shade of undercoats to distinguish each separate
coat.
APPLICATION
Revise this Article to suit Project. Add
special restrictions on application methods if required.
J.
General: Apply intumescent paints according to manufacturers written
instructions. Use applicators and techniques best suited for substrate and
type of material being applied.
Revise first
subparagraph below if colors are not indicated in a schedule.
1. Do
not paint over dirt, rust, scale, grease, moisture, scuffed surfaces, or
conditions detrimental to forming a durable paint film.
2. Provide
finish coats that are compatible with primers used.
3. The
term "exposed surfaces" includes areas visible when permanent or built-in
fixtures and similar components are in place. Extend coatings in these areas,
as required, to maintain system integrity and provide desired protection.
4. Paint
surfaces behind movable equipment and furniture the same as similar exposed
surfaces.
Application in subparagraph below limits
intumescent paint to door faces because activation of coating on edges may
interfere with door opening.
K. Scheduling
Painting:
Apply first
coat to surfaces that have been cleaned, pretreated, or otherwise prepared for
painting as soon as practicable after preparation and before subsequent
surface deterioration.
1. Film
thickness required is the same regardless of application method. Do not apply
succeeding coats until previous coat has cured as recommended by
manufacturer. If sanding is required to produce a smooth, even surface
according to manufacturer's written instructions.
2. If
undercoats, stains, or other conditions show through the final coat of paint,
apply additional coats until paint film is of uniform finish, color, and
appearance. Give special attention to ensure that edges, corners, crevices,
and exposed fasteners receive a dry film thickness equivalent to that of flat
surfaces.
3. Allow
enough time between successive coats to permit proper drying. Do not recoat
surfaces until paint has dried to where it feels firm, does not deform or feel
sticky under moderate thumb pressure, and where applying another coat of paint
does not cause the undercoat to loose adhesion or cause the finish to crack.
Insert restrictions or limits on using spray
equipment to suit Project.
L. Application
Procedures: Apply coatings by brush, roller, spray, or other applicators
according to manufacturer's written instructions.
1. Spray
Equipment: Use airless spray equipment with orifice size as recommended by
manufacturer for material and texture required. (See above).
M. Minimum
Coating Thickness: Apply materials at not less than manufacturer's
recommended spreading rate for surface to be coated. Provide total dry film
thickness of entire system as recommended by manufacturer.
N. Prime
Coat: Before applying finish coats, apply a prime coat, as recommended by
manufacturer, to substrates required to be painted that have not been prime
coated by others. Recoat primed and sealed surfaces where evidence of suction
spots or unsealed areas appears in the first coat.
O. Produce
a smooth surface film using multiple coats. Provide a finish free of laps,
runs, color irregularity, brush marks, orange peel, nail holes, or other
surface imperfections.
P. Completed
Work: Match approved samples for texture and coverage. Remove, refinish, or
repaint work not complying with specified requirements.
CLEANING AND PROTECTION
Q. Cleanup:
At the end of each workday, remove rubbish, empty cans, rags, and other
discarded materials from Project site.
Delete subparagraph below if final cleaning is
not done by painter.
1. After
completing painting, clean glass and paint-spattered surfaces. Remove
spattered paint by proper methods. Be careful not to scratch or otherwise
damage adjacent finished surfaces.
R.
Provide
"Wet Paint" signs to protect newly painted finishes. After completing
painting, remove temporary protective wrappings provided by others to protect
their work.
1. After work of
other trades is completed, touch up and restore damaged or defaced surfaces.
Comply with PDCA P1.
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