Datasheet
TYPICAL PROPERTIES
Specification writers: These values are not
intended for use in preparing
specifications.
As supplied
Color: Clear
•
Specific gravity (ASTM D 1298): 0.95
•
Viscosity at 25°C (77°F) (mPa.s): 200
•
Flash point - closed cup: 8°C (46.4°F)
•
After application
Minimum sealant application time at
25°C (77°F): 30 minutes
•
Maximum sealant application time at
25°C (77°F): 120 minutes
•
TECHNICAL DATA
Packaging: 500ml container
•
Application temperature: 5-30°C
(41-86°F)
•
APPLICATIONS
DOW CORNING P Primer is designed to
promote the adhesion of room temperature
vulcanizing silicone sealants to porous
surfaces.
APPLICATION METHOD
Surfaces to which primer will be applied
should be thoroughly cleaned by first
brushing away any loose material and
then, using abrasive techniques, clean the
surface area to be primed. Ensure surfaces
are dry and dust-free after cleaning. Please
consult the relevant product information
sheet for recommendations on cleaning
products.
Prior to application, sufficient primer
should always be transferred to a working
container and not used directly from the
original container. Do not decant more
primer than can be used in one hour. This
procedure will prevent wastage and
contamination of the bulk material.
DOW CORNING P Primer should be
applied using a brush to form a continuous
thin film on the surface of the substrate.
After application of the primer, brushes
and working containers should be cleaned
with an appropriate solvent. Any unused
primer that has been decanted should be
discarded in an appropriate manner and
not returned to the original container.
HANDLING PRECAUTIONS
The following points should be taken into
account when using DOW CORNING P
Primer:
Highly flammable
•
Harmful by inhalation
•
Keep away from sources of ignition -
no smoking
•
Take precautionary measures against
static discharges
•
Avoid contact with skin and eyes
•
Use only in well ventilated areas
•
USABLE LIFE AND STORAGE
When stored between 5°C (41°F) and
30°C (86°F) in the original unopened
containers, this product has a usable life of
9 months from the date of production.
DOW CORNING
Barrier Primer
DESCRIPTION
DOW CORNING Barrier Primer is a two-
component, chemically curing primer
supplied in two pre-measured quantities
for mixing prior to use.
TYPICAL PROPERTIES
Specification writers: These values are not
intended for use in preparing
specifications.
As Supplied - Part A
Color: Pale yellow
•
Specific gravity (ASTM D 1298): 1.0
•
Viscosity at 25°C (77°F) (mPa.s): 1000
•
Flash point - closed cup: 35°C (95°F)
•
As Supplied - Part B
Color: Pale yellow
•
Specific gravity (ASTM D 1298): 1.0
•
Viscosity at 25°C (77°F) (mPa.s): 5000
•
Flash point - closed cup: 35°C (95°F)
•
As mixed
Mix ratio (by volume): 1:1
•
Working life at 25°C (77°F): 360
minutes
•
After application
Minimum sealant application time at
25°C (77°F): 60 minutes, or when
surface is tack-free
•
Maximum sealant application time at
25°C (77°F): 360 minutes
•
TECHNICAL DATA
Packaging:
500ml in 1000ml container Part A
500ml in 1000ml container Part B
•
Application temperature: 5-30°C
(41-86°F)
•
APPLICATIONS
DOW CORNING Barrier Primer is
designed to promote the adhesion of room
temperature vulcanizing silicone sealants
to porous surfaces particularly where the
surfaces are friable or prolonged water
immersion is expected.
APPLICATION METHOD
Surfaces to which primer will be applied
should be thoroughly cleaned by first
brushing away any loose material and
then, using abrasive techniques, clean the
surface area to be primed. Ensure surfaces
are dry and dust-free after cleaning. Please
consult the relevant product information
sheet for recommendations on cleaning
products.
When using DOW CORNING Barrier
Primer the procedure is slightly different
after cleaning the surfaces. The Part A and
Part B containers should be opened and
then all of the Part A poured into the Part
B container. The lid of the Part B
container should then be replaced and the
contents mixed thoroughly by shaking the
container for at least 2 minutes.
The DOW CORNING Barrier Primer is
then ready for use and has a working life
of 6 hours from the time of mixing.
DOW CORNING Barrier Primer should
be applied using a brush to form a
continuous thin film on the surface of the
substrate. After application of the primer,
brushes and working containers should be
cleaned with an appropriate solvent. Any
unused primer that has been decanted
should be discarded in an appropriate
manner.
HANDLING PRECAUTIONS
The following should be taken into
account when using DOW CORNING
Barrier primer:
Flammable
•
Do not breathe vapor
•
Avoid contact with skin and eyes
•
Use only in well ventilated areas
•
USABLE LIFE AND STORAGE
When stored between 5°C (41°F) and
30°C (86°F) in the original unopened
containers, this product has a usable life of
12 months from the date of production.
Ref. no. 62-0965A-01
2 / DOW CORNING Construction Primer Guide