Loctite SI 5699 RTV Grey Silicone Gasket Maker



Loctite SI 5699 Rtv Grey Silicone Gasket Maker

  • Tensile Shear Strength : 1.7 N/mm²
  • Full Cure Temperature : 77 °F
  • Key Substrates : Metal, Plastic
  • Color : Grey
  • Curing Type : Room temperature vulcanizing (RTV)
  • Application : Sealing

LOCTITE SI 5699 is a flexible silicone sealant and cures exposure to moisture in the air to form a tough rubber gasket. The product is designed primarily for flange sealing with excellent oil resistance or rigid flange sealing for example on transmissions and cast metal housings. It is tack-free after just 10 min. The product is water-glycol resistant and can be used on machined or cast surfaces, metal or plastic.

  • Ideal for sealing all types of flanges including stamped sheet metal covers where water-glycol resistance is required
  • Tack-free after 10 min.
  • P1 NSF Reg. No.: 122998
LOCTITE® SI 5699™ is designed primarily for flange sealing
with excellent oil resistance on rigid flange sealing for example
on transmissions and cast metal housings.
NSF International

Registered to NSF Category P1 for use as a sealant where
there is no possibilty of food contact in and around food
processing areas. Note: This is a regional approval. Please
contact your local Technical Service Center for more
information and clarification.

Cure Speed

The graph below shows shear strength developed with time on
grit blasted mild steel lapshears at a bond gap of 0.5 mm.
Cure condition 23±2 °C, 60±5% RH. Strength is determined
according to ISO 4587
Depth of Cure

The depth of cure depends on temperature and humidity.
Depth of cure was measured on strip pulled from a
ramped PTFE mold (maximum depth 10 mm).

This product is not recommended for use in pure oxygen
and/or oxygen rich systems and should not be selected as
a sealant for chlorine or other strong oxidizing materials.
For safe handling information on this product, consult the
Safety Data Sheet (SDS).
NOTE: This product is not recommended for contact with
Directions for use:

  1. For best performance bond surfaces should be clean and
    free from grease.
  2. Moisture curing begins immediately after the product is
    exposed to the atmosphere, therefore parts to be
    assembled should be mated within a few minutes after the
    product is dispensed.
  3. The bond should be allowed to cure (e.g. seven days),
    before subjecting to heavy service loads.
  4. Excess material can be easily wiped away with non-polar
  5. For full automatic applications a volumetric dispensing
    system is recommended.

Loctite Material Specification

LMS dated October -24, 2001. Test reports for each batch are
available for the indicated properties. LMS test reports include
selected QC test parameters considered appropriate to
specifications for customer use. Additionally, comprehensive
controls are in place to assure product quality and
consistency. Special customer specification requirements may
be coordinated through Henkel Quality.

Store product in the unopened container in a dry location.
Storage information may be indicated on the product container
Optimal Storage: 8 °C to 21 °C. Storage below 8 °C or
greater than 28 °C can adversely affect product properties.
Material removed from containers may be contaminated during
use. Do not return product to the original container. Henkel
Corporation cannot assume responsibility for product which
has been contaminated or stored under conditions other than
those previously indicated. If additional information is required,
please contact your local Technical Service Center or
Customer Service Representative.
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