Product Information
High
Performance ®
Building Dow Corning 1200 OS Primer
FEATURES & BENEFITS APPLICATIONS
Improves adhesion of silicone Primer for silicone adhesives and sealants
sealants to many substrates
Provides more uniform and TYPICAL PROPERTIES
stronger bonds Specification Writers: These values are not intended for use in preparing
Conforms to South Coast and Bay specifications. Please contact your local Dow Corning sales office or your Global
Air Quality Management District Dow Corning Connection before writing specifications on this product.
Regulations for Architectural
Sealant Primers Property Unit Result
Low VOC at 76 g/l
Color Colorless
Formulated for low toxicity
OS solvent used does not deplete Viscosity at 23°C (73.4°F) mPa.s 1
the ozone layer. OS = Ozone Safe Flash point - closed cup °C (°F) 27 (80.6)
Primer is suitable for
Weathersealing and Structural VOC inclusive g/l 76
Glazing applications Specific gravity at 23°C (73.4°F) 0.84
DESCRIPTION HOW TO USE
Dow Corning® 1200 OS Primer is With many surfaces, substantially
used to improve adhesion and stronger and more uniform bonds are
accelerate adhesion build-up of obtained by preparing them with a
silicone sealants to various substrates. primer prior to the application of the
This moisture curing primer is silicone sealant. For obtaining best
supplied as a dilute solution of results, the following steps should be
reactive materials in low viscosity followed on all surfaces except
siloxane. silicone rubber.
The Dow Corning 1200 OS Primer is 1. Thoroughly clean and degrease
classified as Low-Solids Adhesive the surface using a 2 rag wipe
Primer according to the following method and appropriate solvent,
regulations: Rule 1168 for Adhesives when needed. Cleaning
and Sealant Applications published on procedures are defined in the
the South Coast Air Quality Dow Corning Americas Technical
Management District and Rule 8-51 Manual. Allow the surface to dry.
for Organic Compounds, Adhesive
and Sealant Products published by the 2. Apply a thin coat of Dow Corning
Bay Area Air Quality Management 1200 OS Primer by applying with
District. The VOC Inclusive value a clean white rag or brush. In
reported on the product label follows most cases, a thin primer film will
the definitions on these regulations. give best adhesion. If a white
The VOC Exclusive value on the chalky residue is noticed after
product label does not apply. several minutes of drying time,
wipe away the chalky residue with
a clean rag.
3. At normal temperatures and This material must be stored in a shall not be taken as inducements to
humidity conditions (room warehouse suitable for flammable infringe any patent.
temperature, 50% R.H.), the materials.
primer should be allowed to air Dow Corning’s sole warranty is that
dry from 15 to 90 minutes. Containers should be kept tightly our products will meet the sales
Because the primer cures in sealed when not in use. The primer specifications in effect at the time of
contact to air moisture, low hydrolyses upon contact with air shipment.
humidity will necessitate longer moisture, and prolonged exposure will
drying time. The optimal drying reduce or destroy its effectiveness. Your exclusive remedy for breach of
time for a specific area should be such warranty is limited to refund of
determined prior to use. Primer Once hydrolysed, indicated by a milky purchase price or replacement of any
which is allowed to cure appearance, the material cannot be product shown to be other than as
extensively will not promote reclaimed, and will contaminate any warranted.
adhesion anymore. As a general unreacted primer.
rule, drying times of more than TO THE FULLEST EXTENT
6 hours at normal temperatures PACKAGING PERMITTED BY APPLICABLE
and humidity should be avoided. LAW, DOW CORNING
INFORMATION
Dow Corning 1200 OS Primer is SPECIFICALLY DISCLAIMS
4. Apply silicone sealant from ANY OTHER EXPRESS OR
available in standard industrial
Dow Corning. IMPLIED WARRANTY OF
container sizes. For details please refer
to your Dow Corning sales office. FITNESS FOR A PARTICULAR
Note: Always use buffer container PURPOSE OR
when applying with a brush. To avoid MERCHANTABILITY.
contamination and product LIMITATIONS
deactivation, do not mix used This product is neither tested nor DOW CORNING DISCLAIMS
materials into fresh or unused primer represented as suitable for medical or LIABILITY FOR ANY
can. pharmaceutical uses. INCIDENTAL OR
CONSEQUENTIAL DAMAGES.
HANDLING HEALTH AND
PRECAUTIONS ENVIRONMENTAL We help you invent the future.
PRODUCT SAFETY INFORMATION
INFORMATION REQUIRED FOR To support customers in their product dowcorning.com
SAFE USE IS NOT INCLUDED IN safety needs, Dow Corning has an
THIS DOCUMENT. BEFORE extensive Product Stewardship
HANDLING, READ PRODUCT organization and a team of Product
AND SAFETY DATA SHEETS Safety and Regulatory Compliance
AND CONTAINER LABELS FOR (PS&RC) specialists available in each
SAFE USE, PHYSICAL AND area.
HEALTH HAZARD
INFORMATION. THE SAFETY For further information, please see our
DATA SHEET IS AVAILABLE ON website, dowcorning.com or consult
THE DOW CORNING WEBSITE your local Dow Corning
AT DOWCORNING.COM, OR representative.
FROM YOUR DOW CORNING
SALES APPLICATION LIMITED WARRANTY
ENGINEER, OR DISTRIBUTOR, INFORMATION – PLEASE
OR BY CALLING
DOW CORNING CUSTOMER
READ CAREFULLY
The information contained herein is
SERVICE.
offered in good faith and is believed to
be accurate. However, because
USABLE LIFE AND conditions and methods of use of our
STORAGE products are beyond our control, this
When stored at or below 25°C (77°F) information should not be used in
in the original unopened containers, substitution for customer’s tests to
this product has a usable life of 18 ensure that our products are safe,
months from the date of production. effective, and fully satisfactory for the
intended end use. Suggestions of use
Dow Corning is a registered trademark of Dow Corning Corporation.
We help you invent the future is a trademark of Dow Corning Corporation.
2015, October 13 XIAMETER is a registered trademark of Dow Corning Corporation.
Form No. 63-1178A-01 © 2010–2015 Dow Corning Corporation. All rights reserved.
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