SILA-SEAL ULTRA-HIGH TEMPERATURE
SILICONE SEALANTS
Sila-Seal Ultra-High Temperature Silicone Sealant
For areas where high temperatures and vibrations are prevalent.
Withstands temperatures up to 600 Degrees F.
Sila-Seal Ultra-High Temperature Silicone Sealant is a one-part, non-slumping 100% silicone sealant with the consistency similar to that of toothpaste. It cures when it is exposed to moisture in the air to form a tough rubbery seal. Sila-Seal Ultra-High Temperature Silicone Sealant was formulated to perform at temperatures ranging from -85°F to 500°F (–65°C to 260°C) under continuous operating conditions. During intermittent exposure, Sila-Seal Ultra-High Temperature Silicone Sealant will withstand temperatures as high as 600°F (316°C). It is ideal for a number of sealing and bonding applications:
• HVAC and industrial use
• Aerospace gasketing
• Heating elements in appliances
• Industrial ovens
• Bag filters on smoke stacks
• Automobiles, RVs, boats and small engines
• Use to make/replace expensive paper and cork gaskets
• Head gaskets
• Water pumps
• Rocker covers
• Heat risers
• Timing chain/belt covers
• Bonding, sealing, potting and encapsulating high temp areas
• UL recognized
Currently available in red only.
Available in 10.1 fl oz cartridges and 2.8 oz squeeze tubes. Also available in 5 gallon pails upon request.
10.1 oz Cartridge: Part No. 1233-600
2.8 oz Squeeze Tube: Part No. 1230-6003
FEATURES & TYPICAL USES:
The high temperature properties of Sila-Seal Ultra-High Temperature Silicone Sealant make it ideally suited for sealing and encapsulating heating elements in appliances, aerospace gasketing, moving oven belts, industrial ovens and bag filters on smoke stacks. It is also used in applications for other critical bonding, sealing, potting, encapsulating and protective coatings where parts must perform at high temperatures. There are also many applications for Sila-Seal Ultra-High Temperature Silicone Sealant in and around automobiles, RV’s, boats and in small engines. It can be used for making and/or replacing expensive paper and cork gaskets in water pumps, timing chain/belt covers, rocker covers, heat risers, and any area where high temperatures and vibration are prevalent. Sila-Seal Ultra-High Temperature Silicone Sealant is oxygen sensor safe.
SURFACE PREPARATION & APPLICATON:
Sila-Seal Ultra-High Temperature Silicone Sealant is supplied ready-to-use. It flows readily from its container under pressure. The paste-like consistency makes it easy to work with; a spatula or wooden paddle can be used to tool the surface.
TACK-FREE TIME:
Curing progresses inward from the surface. At conditions of 77°F (25°C) and 50% relative humidity, a tack-free skin forms within 10-20 minutes. Tooling should be completed immediately after application. If masking tape is used to mask an area, it must be removed before the tack-free skin forms.
CURE TIME:
Cure time is affected by relative humidity, degree of confinement and cross-sectional thickness of the sealant. Sections up to 1/8” (3.2 mm) thick become rubbery solids in about 24 hours at room temperature and 50% relative humidity. In applications where Sila-Seal Ultra-High Temperature Silicone Sealant may be partially or totally confined during cure, the time required for proper cure is generally lengthened by the degree of confinement. Every application involving confinement during cure should be thoroughly tested before production commences. Curing time increases with the thickness of the sealant. A 1/2” (12.7 mm) cross section for example, may require 3 or 4 days for complete cure. However, the cure will have penetrated the outer 1/8” (3.2mm) in about 24 hours.
SPECIFICATIONS:
Sila-Seal Ultra-High Temperature Silicone Sealant is designed to meet the requirements of MIL-A-46106A, Amendment 2, Type 1. Sila-Seal Ultra-High Temperature Silicone Sealant meets USDA regulations for use in federally inspected meat and poultry plants. Agricultural Canada Approved. Sila-Seal Ultra-High Temperature Silicone Sealant is recognized by Underwriters Laboratories for service to 302°F (150°C) where elongation is not essential. UL plastics component QMFZ2 file no. E 196754.
Specific Gravity: 1.04
Extrusion rate 1/8” (3.2 mm) orifice, 90 psi air pressure: 335 g/minute
Flow Rate (sag or slump): Nil
Tack-Free Time at 77°F (25°C) and 50% R.H.: 17 minutes
Cure time at 77°F (25°C) and 50% R.H (3.2mm (1/8”) thickness): 24 hours
Unprimed Adhesion (most substrates): Good
As Cured - Physical - after 3 days at 77°F (25°C) and 50% Relative Humidity:
ASTM C661 – Durometer Hardness Shore A, points: 26
ASTM D 412 Die C - Tensile Strength, MPa (psi): 2.4 (350)
ASTM D 412 Die C - Elongation at break, percent: 600
ASTM D 746 - Brittle point, °F (°C): -80 (-62)
ASTM D 2137 A - Volume Coefficient of
Thermal Expansion 32°F to 212°F (0°C to 100°C): 9.3 x 10-4
Thermal Conductivity, Cal/[(sec)(°C)(cm)]: 0.45 x 10-3
LIMITATIONS:
Sila-Seal Ultra-High Temperature Silicone Sealant is not recommended for use in applications involving:
• Structural silicone glazing
• Joints where physical abuse or abrasion is likely to be encountered
• Prolonged water immersion
• Porous surfaces, such as masonry
• Building materials that might bleed oils, plasticizers or solvents – materials such as impregnated wood, oil-based caulks, green or partially vulcanized rubber gaskets or tapes
• Totally confined spaces, because sealant requires atmospheric moisture to cure
• Surfaces sensitive to corrosion by acetic acid vapors (a byproduct of sealant cure)
• Surfaces that will be painted; complete all painting prior to using sealant
• Bonding to secondary seal of insulating glass units sealed with two-part silicone sealants
• This product is neither tested nor represented as suitable for medical or pharmaceutical uses
DISCLOSURE:
The information and data contained herein is BASED ON INFORMATION WE BELIEVE TO BE RELIABLE. Please read all statements, recommendations or suggestions herein in conjunction with our CONDITIONS of SALE which apply to all goods supplied by us. We assume no responsibility for the use of theses statements, recommendations or suggestions, nor do we intend them as recommendation for any use which would infringe any patent or copyright.
Sila-Seal, Inc.
5167 East 65th Street
Indianapolis, IN 46220
(800) 968-4131
