CEMP-ET
TI 809-53
01 May 1999
Chlorosulfonated polyethylene (CSPE)-- Family
Cant strip--A beveled strip used under flashings
of polymers that are produced by polyethylene
to modify the angle at the point where the
reacting with chlorine and sulfur dioxide. Present
roofing or waterproofing membrane meets any
polymers contain 25-43% chlorine and 1.0-1.4%
vertical element.
sulfur. They are used in both vulcanized and
nonvulcanized forms. Most membranes based
Capflashing--See Flashing.
on CSPE are nonvulcanized. ASTM designation
for this polymer is CSM. Best known by the
Capsheet--A granule-surfaced coated felt used
DuPont Tradename "Hypalon".
as the top ply of a built-up roofing membrane.
Closure strip--A resilient strip such as
Caulk--To seal joints, seams, or voids by filling
neoprene, flat on one side and formed to the
with a waterproofing compound or material.
contour of ribbed sheets on the other,
used
to
close
openings
created
Caulking--A composition of vehicle and
by joining metal sheets and flashings.
pigment, used at ambient temperatures for filling
joints, that remains plastic for an extended time
after application.
Cavity Wall--A wall built of hollow masonry units
arranged to provide a continuous internal air
space.
Centistoke--unit measurement of viscosity-i.e.,
Coefficient of thermal expansion--The change
Chain scission--Breaking of chemical bonds
in length per unit of length for a unit change in
between carbon atoms by UV photo-oxidation, a
temperature. (Thus the coefficient per 0F must
reversal of the asphalt-blowing polymerization
be multiplied by 1.8 for the coefficient per oC.)
process
that
produces
long
chainlike
hydrocarbon chains, resulting in embrittlement
Coal tar--A dark brown to black cementitious
and cracking.
material produced by the destructive distillation
of coal.
Chalk
resistance--A
measurement
of
performance for paint systems; the ability to
Coal tar felt--A felt saturated with refined coal
resist a dusty/chalky appearance over time.
tar.
Chalking--A powdery residue on the surface of
Coal tar pitch--Dark brown to black, solid
a material resulting from degradation or
cementitious material obtained as residue in the
migration of an ingredient, or both.
partial evaporation or distillation of coal tar.
Channel mopping--See Strip mopping under
Coated fabric--Fabrics impregnated and/or
Mopping.
coated with a plastic material in the form of a
solution, dispersion hot melt, or powder. (The
Chlorinated polyethylene (CPE)--Family of
term also applies to materials resulting from the
polymers produced by chemical reaction of
application of a preformed film to a fabric by
chlorine on the linear backbone chain of
means of calendering.)
polyethylene.
The
resultant
rubbery
thermoplastic elastomers presently contain 25-
Coated sheet (or felt)--(1) An asphalt felt that
45% chlorine by weight and 0-25% crystallinity.
has been coated on both sides with harder,
CPE can be vulcanized but is usually used in a
more viscous asphalt; (2) A glass fiber felt that
nonvulcanized form.
has been simultaneously impregnated and
coated with asphalt on both sides.
D-3
Previous Page
