Technical Data Sheet
Vibra-Tite® 993
RTV Heavy Body Silicone
December 2012
Product Description
Vibra-TITE 993 Heavy Body Black Silicone
Sealant is a one-part neutral cure silicone sealant
with high temperature resistance that cures in the
presence of atmospheric moisture to produce a
durable and flexible silicone rubber compound.
Typical Applications
Vibra-TITE 993 Sealant provides a long-lasting
flexible seal with excellent adhesion to most surfaces.
This sealant is intended for a variety of general
purpose and industrial applications and retains its
elastomeric properties at temperatures from -75 to
500 F (-60 to 260 C.).
Technical Features
Specially designed for automotive applications
such as sealing exhaust manifolds; turbo
housings; oxygen sensors; adhering auto and
appliance trim; providing form-in-place gaskets
for gear boxes, compressors & pumps; sealing
trailers and truck cabs; bonding and sealing
appliance parts.
The consistency of Vibra-TITE 993 Sealant
remains uniform over a wide range of
temperatures. It may be applied in sub-zero
weather without loss of extrusion or physical
properties.
Vibra-TITE 993 Sealant retains its elastomeric
properties at temperatures from -75 to 500 F
and can be used for intermittent exposure at
temperatures up to 600 F.
Limitations
Vibra-TITE 993 Sealant is not recommended for
use in the following applications:
Do not use silicone gasket maker only when
replacing head gaskets.
Do not use on parts continuously immersed
in gasoline.
Glazing or edge sealing of insulated glass.
Structural glazing.
Aquariums
Copper or brass. The cure byproduct may
discolor these surfaces.
Totally confined spaces. Because the
sealant needs atmospheric moisture to cure.
Surfaces that require painting. Paint will not
adhere to most silicone surfaces.
Properties
Sag or Slump: Nil
Color: Black
Specific Gravity: 1.31
Tack-free time: <1 hr (@ 77 F, 50% RH)
Curing time: 24 hrs (@ 77 F, 50% RH, ¼” bead)
Durometer hardness, Shore A: 25-35
Meets GM Specification: 9985985
Procedure for Application
1. Clean and dry surfaces. Surfaces should be free of
dirt, grease, oil and old gasketing material.
2. Remove cap, puncture inner seal, screw on
extension nozzle and cut nozzle to desired bead
width.
3. Apply an approximate 1/8” unbroken bead to one
surface, completely encircle all bolt holes.
4. Assemble parts while material is tacky (approx. 5
to 10 minutes). Do not over tighten bolts. Material
skins within 15 minutes.
5. May be applied to both sides of gasket to use as a
pre-cut gasket dressing.
6. Allow to cure for at least 15 minutes. Material
normally fully cures in 24 hours.
7. Remove nozzle and replace cap after use.
Shelf Life
When stored in original, unopened containers at or
below 90 F (32 C) Vibra-TITE 993 Sealant has a
minimum shelf life of 12 months from the date of
manufacture.
General Information
Health & Safety in use
Because of solid content, use of gloves and goggles
are recommended.
Technical data contained within this document is intended for reference only
For assistance and recommendations on specifications for this product, contact ND Industries
info@ndindustries.com
12/20/2012 Page 1 of 1
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