Specification Sheet

Toll Free: 87 PERMATEX
(877-376-2839)
10 Columbus Blvd., Hartford,
Connecticut 06106
6875 Parkland Boulevard, Solon
Ohio 44139
Technical Data Sheet
Permatex

Sensor-Safe High-
Temp RTV Silicone Gasket
AAM Revised 08/02
NOT FOR PRODUCT SPECIFICATIONS.
THE TECHNICAL DATA CONTAINED HEREIN ARE INTENDED AS REFERENCE ONLY.
PLEASE CONTACT PERMATEX, INC., TECHNICAL SERVICE DEPARTMENT FOR ASSISTANCE AND RECOMMENDATIONS FOR YOUR SPECIFIC APPLICATION.
PERMATEX, INC., HARTFORD SQUARE NORTH, 10 COLUMBUS BOULEVARD, HARTFORD, CT 06106 PHONE – (1-87PERMATEX)
PRODUCT DESCRIPTION S.I.N.: 834-300
Permatex

Sensor-Safe Hi-Temp RTV Silicone Gasket is a
single component, room temperature vulcanizing gasketing
compound designed to provide reliable “formed-in-place”
gaskets for mechanical assemblies. This material cures on
exposure to moisture in the air to form a tough, flexible,
silicone rubber gasket. The product resists aging, weathering
and thermal cycling without hardening, shrinking or cracking.
Designed to be oxygen sensor safe, and maintain maximum
performance in a continuous temperature environment of
600°F.
PRODUCT BENEFITS
• High temperature use
• Sensor safe
• Easy application
• Superior adhesion and flexibility
• Replaces most cut gaskets
• Can be used as a gasket maker or dressing
• Non-flammable
TYPICAL APPLICATIONS
• Intake manifolds
• Thermostat housings
• Valve covers
• Timing gear covers
• Water pumps
• Oil pans
• Transmission pans
DIRECTIONS FOR USE
For assembly as a form-in-place gasket
1. Remove all previous material from mating surfaces.
Permatex

Gasket Remover is recommended for most
materials, not for plastics or painted surfaces.
2. For best results, clean and dry all surfaces with a
residue-free solvent, such as Permatex

Brake and
Parts Cleaner.
3. Cut nozzle to desired bead size, 1/16“ to 1/4“ in
diameter. An 1/8” bead is usually sufficient for most
applications.
4. Remove cap, puncture tube or cartridge seal and attach
extension nozzle.
5. Apply a continuous and even bead of silicone to one
surface, first tracing the internal areas of the gasket
configuration, then all surrounding bolt holes as shown
below:
6. Assemble parts immediately while silicone is still wet.
Secure or tighten to recommended torque specs.
7. Re-torque will not be necessary after the product has
cured.
For assembly as a gasket dressing
1. Repeat steps 1 thru 4 as in previous section.
2. Apply a thin film of silicone to one surface to be sealed.
3. Place the pre-cut gasket onto silicone film.
4. Apply a second thin to pre-cut gasket surface.
5. Remove any excess and assemble parts immediately.
Note: Product not recommended for use as a cylinder
head gasket or head gasket sealant.
For Cleanup
1. Allow excess material to extend beyond the extension
nozzle or aerosol tip to cure, sealing and protecting the
remaining product from moisture. For reuse, simply
remove the cured product from the tip.
2. Remove uncured product from parts and hand-tools with
a dry cloth, if skinned over, break film with a dry cloth to
remove as much as possible, and remove the remaining
material with Permatex

Gasket Remover as previously
stated.
3.
Clean hands with a dry cloth or Permatex

Fast
Orange

hand cleaner.
PROPERTIES OF UNCURED MATERIAL
Typical Value
Chemical Type Acetoxy silicone rubber
Appearance Red non-sag paste
Odor Mild acetic
Specific Gravity 1.05
Extrusion rate @ 25
_
C, (grams/min) >100
Flash Point
_
C (
_
F) >93 (>200)