K-Factor (aged)
ASTM C 177
0.15
BTU per
ASTM C 518
(maximum)
SF/hr;
deg F
per inch
Compressive Strength
ASTM D 1621
42 (minimum)
lb/in2
Parallel to Foam Rise
Shear Strength
ASTM C 273
40 (minimum)
lb/in2
Tensile Strength
ASTM D 1623
60 (minimum)
lb/in2
Parallel to Foam Rise
Dimensional Stability
ASTM D 2126
6 (maximum)
percent net
(Humid Aging) 7 days
volume change
160 F, 100 relative
humidity
Water Vapor
ASTM E 96
3.0
perm/inch
Permeability
(maximum)
Closed Cell Content
ASTM D 2856
90 (minimum)
% by volume
Water Absorption
ASTM D 2842
0.10
lb./ft2
(maximum)
Flammability
ASTM E 84
Flame spread
--
of 75 or
less
2.2
PROTECTIVE COATING
**************************************************************************
NOTE: Refer to Society of Plastics Industry
publication AY 102, "A Guide for Selection of
Elastomeric Protective Coatings Over Sprayed
Polyurethane Foam" for information regarding
coatings selection. Include only the required
coating type(s). Delete other options.
In general roof coatings designated as Types A and B
are equally acceptable and should be included as
Contractor options where roof slopes are 1/2:12 or
greater. Coating Type CB may be used as the total
coating system (base, intermediate, and finish) or
may be used as base and intermediate with Type CF as
finish coat. Coating Type CF should only be used as
finish coat. Systems using type CB as total or a
combination of Types CB and CF may be used for any
slope.
SELECTION GUIDANCE TABLE
COATING DESCRIPTION
PERFORMANCE FEATURES
RECOMMENDED APPLICATIONS
Type A(Silicone)
One component system.
High permeability (breathable).
SECTION 07570
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