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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 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:
Structural Steel and Aluminum @ various
thicknesses (see individual test reports)
·
ASTM-E119/UL-263 – 2-Hour
rating on .250 plate steel.
·
ASTM-E119/UL-263 – 1.5 Hour
rating on W10x49 beams
·
ASTM-E119/UL-263 – 1.5 Hour
rating on HSS 06.00 x .250 columns
·
DIN 4102 Part 8 – 1.5 hour
rating on .250 plate steel.
·
CTL Test for Thermal
Protection of .125 Aluminum Sheeting
·
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 COATS
1. Prime
Coat: Factory-formulated red oxide or similar applied at spreading rate
recommended by manufacturer.
2.
Intermediate Coat: Intumescent-type,
fire-retardant paint applied at spreading rate of 10 – 20 mils wet using
multiple coats to achieve a total
dry film thickness of 75 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. 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
manufacturer's 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
re-prime
substrate.
Revise
paragraph and subparagraphs below to suit products specified.
H. Material
Preparation: Mix and prepare paint materials according to manufacturer's
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. Use
only thinners recommended by manufacturer and only within recommended limits.
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 manufacturer's 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, sand between applications.
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.
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, even 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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