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

HI-Temp Red RTV
Silicone Gasket
AAM Revised 01/03
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

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 maintain maximum performance in a continuous
temperature environment of 600°F. OEM Specified.
PRODUCT BENEFITS
• High temperature use
• Superior adhesion and flexibility
• Replaces most cut gaskets
• Can be used as a gasket maker or dressing
• Easy application
• Non-flammable
• Non-toxic
TYPICAL APPLICATIONS
• Drive housings
• Exhaust manifolds
• Thermostat housings
• Valve covers
• Timing gear covers
• Water pumps
• Differential covers
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:
6. Assemble parts immediately while silicone is still wet.
7. Finger tighten flange only until material begins to seep
out the sides of the flange.
8. Allow to set for at least two hours and re-torque at
lease one quarter to one half turn.
9. For best results, allow to cure overnight.
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.
Instructions for PowerBead
1. Clean and dry all flange surfaces to be sealed.
2. Remove black cap from top of extension nozzle.
3. Turn nozzle extension one complete turn (360°)
counterclockwise.
4. Depress finger trigger and apply a continuous 1/16 inch
to 1/8 inch PowerBead to one surface.
5. Assemble parts immediately while silicone is still wet.
6. Finger tighten flange only until material begins to seep
out the sides of the flange.
7. Allow to set for at least two hours and re-torque at least
one quarter to one half turn.
8. For best results, allow to cure overnight.
9. To close, turn extension nozzle clockwise until tight
(about one full turn). Wipe off excess material from
nozzle and replace black cap.