MOMENTIVE RTV 108 translucent - One Part Silicone Adhesive Sealants
Technical Data Sheet
|Physical Properties ||Metric ||English ||Comments |
|Density ||1.05 g/cc ||0.0379 lb/in³ || |
|Mechanical Properties ||Metric ||English ||Comments |
|Hardness, Shore A ||30 ||30 || |
|Tensile Strength, Ultimate ||2.75 MPa ||399 psi || |
|Elongation at Break ||450 % ||450 % || |
|Shear Strength ||1.03 MPa ||149 psi ||Typical lap shear |
|Electrical Properties ||Metric ||English ||Comments |
|Dielectric Constant ||2.80 |
@Frequency 60 Hz
@Frequency 60 Hz
|Dielectric Strength ||19.5 kV/mm ||495 kV/in || |
|Thermal Properties ||Metric ||English ||Comments |
|Maximum Service Temperature, Air ||205 °C ||401 °F ||Continuous useful temperature. |
|Minimum Service Temperature, Air ||-60.0 °C ||-76.0 °F ||Continuous useful temperature. |
|Processing Properties ||Metric ||English ||Comments |
|Processing Temperature ||25.0 °C ||77.0 °F || |
FDA 21 CFR 177.2600, USDA,
NSF International Std. No. 51
RTV102, RTV103, RTV106, RTV108, RTV109, RTV112, RTV116, RTV118 Adhesive Sealants
RTV102, RTV103, RTV106, RTV108, RTV109, RTV112, RTV116 and RTV118 one component, ready-to-use adhesive sealants are extremely versatile. They cure to a tough, durable, resilient silicone rubber on exposure to atmospheric moisture at room temperature. Acetic acid vapors are released from the sealant surface as a by-product of cure.
RTV102, RTV103, RTV108 and RTV109 sealants are standard strength paste consistency products which can be applied to vertical and overhead surfaces where pourable/self-leveling sealants are not practical.
RTV112 and RTV118 sealants are self-leveling products which are preferable to paste-consistency sealants when flow into small crevices and hard-to-reach places is desired.
RTV106 sealant is paste-consistency sealant. RTV116 sealant is a self-leveling sealant. Both RTV106 and RTV116 sealants are standard strength high-temperature sealants.
Since all these sealants utilize a moisture cure system, they must not be used in thicknesses of greater than 6mm (1/4 in.).
Where section depths exceed 6mm (1/4 in.), Momentive Performance Materials one component, addition cure or two-component silicone rubber compounds are recommended.
Key Features and Benefits
Capability to cure at room temperature and ambient humidity
Self adhesion properties
Low temperature flexibility
High temperature performance
Excellent weatherability and ozone and chemical resistance
Excellent electrical insulation properties
Typical Physical Properties
Paste Self leveling
RTV109: Aluminum Red
Viscosity, poises 250 200
Application Rate, (g/min) 400
Tack-Free Time, minutes
Tensile Strength, kg/cm 2(lb/in2)
Hardness, Shore A
Tear Strength, kg/cm (lb/in)
Shear Strength, kg/cm 2 (lb/in 2)14 (200)
Peel Strength, kg/cm (lb/in)
Dielectric Strength, kv/mm (v/mil)
Dielectric Constant @ 60 Hz 2.8
Dissipation Factor @ 60 Hz 0.001
Volume Resistivity, ohm-cm
Brittle Point, °C (°F)
Maximum continuous operating temperature, °C (°F)
Maximum intermittent operating temperature, °C (°F)
Linear Shrinkage, % 1.0
Thermal Conductivity, cal/sec/cm 2, °C/cm 0.0005 (Btu/hr/ft 2, °F/ft) (0.12)
Coefficient of Expansion cm/cm, °C 27x10-5 (in/in, °F) (15x10-5)
(1) Cure time 3 days at 25°C (77°F) / 50% relative humidity.
(2) At 100% cohesive failure.
(3) At 100% cohesive failure using 1 in. x 8 in. stainless steel screen at 180° pull angle.
( 4) Information is provided for customer convenience only. These properties are not tested on a routine basis.
Potential Applications UL Food Contact
General purpose pastes
General purpose bonding, sealing, electrical insulation, formed-in-place gaskets. Can be applied to vertical or overhead surfaces.
File 36952 FDA 21 CFR 177.2600, USDA, NSF International Std. No. 51
High temperature paste
Sealing heating elements, gasketing, electrical insulation, and other critical
bonding and sealing applications where parts must perform at high
temperatures. Can be applied to vertical or overhead surfaces.
File 36952 FDA 21 CFR177.2600, USDA, NSF International Std. No. 51
Thin section potting, filling small surface voids, self leveling protective coating, electrical
insulation where high temperature performance is required.
File 36952 FDA 21 CFR 177.2600, USDA, NSF International Std. No. 51
General purpose Electrical insulation, thin section potting, self leveling protective coatings. Will flow into small crevices and hard to reach places.
File 36952 FDA 21 CFR 177.2600, USDA, NSF International Std. No. 51
These sealants were not designed for and should not be used for applications intended for permanent implantation into the human body.
These sealants are not for use in delicate electrical and electronic applications in which corrosion of copper, brass or other sensitive metals is undesirable.
Nothing contained herein shall be construed to imply the nonexistence of any relevant patents or to constitute the permission, inducement or recommendation to practice any invention covered by any patent, without authority from the owner of the patent.
Product Safety, Handling and Storage
Customers should review the latest Safety Data Sheet (SDS) and label for product safety information, safe handling instructions, personal protective equipment if necessary, emergency service contact information, and any special storage conditions required for safety. Momentive Performance Materials (MPM) maintains an around-the-clock emergency service for its products. SDS are available at www.momentive.com or, upon request, from any MPM representative. For product storage and handling procedures to maintain the product quality within our stated specifications, please review Certificates of Analysis, which are available in the Order Center. Use of other materials in conjunction with MPM products (for example, primers) may require additional precautions. Please review and follow the safety information provided by the manufacturer of such other materials.
RTV102, RTV103, RTV106, RTV108, RTV109, RTV112, RTV116 and RTV118 sealants will bond to many clean surfaces without the aid of primers. These surfaces typically include many metals, glass, ceramic, silicone rubber and some rigid plastics. These adhesive sealant products will also produce fair bonds to organic rubber and to some flexible plastics not containing fugitive plasticizers (which migrate to the surface, impairing adhesion). An evaluation should be made to determine bond strength for each specific application.
For difficult-to-bond substrates, use of a primer is suggested. Primers SS4004, SS4044 and SS4179 are recommended for use with these sealants. Complete information and usage instructions for these primer products are contained in a separate product data sheet.
Where adhesion is required, surfaces should be thoroughly cleaned with a suitable solvent such as naphtha or methyl ethyl ketone (MEK) to remove dirt, oil and grease. The surface should be wiped dry before applying the adhesive sealant.
When solvents are used, proper safety precautions must be observed.
Application and Cure Time Cycle
Paste-consistency products may be applied directly to clean or primed substrates. Where broad surfaces are to be mated, the sealant should be applied in a thin, less than 6mm (1/4 in.) diameter, bead or ribbon around the edge of the surface to be bonded.
Flowable products may be applied to clean or primed substrates by pouring directly from the original container or dipping. These products will self-level on a surface, filling small crevices and surface voids.
Depth of potted sections should not exceed 6mm (1/4 in.).
The cure process begins with the formation of a skin on the exposed surface of the sealant and progresses inward through the material. At 25°C (77°F) and 50% relative humidity, RTV102, RTV103, RTV106, RTV108, RTV109, RTV112 and RTV116 sealants will form a surface skin which is tack-free to the touch in 15 to 30 minutes. Once the tack-free skin has begun to form, further tooling of the adhesive sealant is not advisable.Higher temperatures and humidity will accelerate the cure process low temperatures and low humidity will
slow the cure rate. As the adhesive sealant cures, acetic acid vapors are released from the sealant surface. The odor of acetic acid will completely disappear when curing is completed.
A 3mm (1/8 in.) section of adhesive sealant will cure through in approximately 24 hours at 25°C (77°F) and 50% R.H. Since cure time increases with thickness, use of these adhesive sealants should be limited to section thicknesses of 6mm (1/4 in.) or less.
Bond Strength Development
In addition to the effects of temperature and relative humidity, development of maximum bond strength will depend on joint configuration, degree of confinement, sealant thickness and substrate porosity. Normally, sufficient bond strength will develop in 12 to 24 hours to permit handling of parts. Minimum stress should be applied to the bonded joint until full adhesive strength is developed. Eventually the adhesive strength of the bond will exceed the cohesive strength of the silicone rubber sealant itself. Always allow maximum cure time
available for best results.
PACKAGING AND DISPENSING
RTV adhesive sealants from Momentive Performance Materials are supplied ready-to-use in collapsible aluminum squeeze tubes, caulking cartridges and in bulk containers.
Collapsible aluminum tubes may be squeezed by hand or with the aid of mechanical wringers which allow more complete removal of material from the tube. Air-operated dispensing guns may also be used with aluminum tubes and offer the advantages of improved control and faster application for production line use.
The sealant may be dispensed from caulking cartridges by using simple mechanical caulking guns or air-operated guns. Air-operated guns will allow greater control and application speed. Both tubes and cartridges are easy to use, can be put into production quickly and require minimal capital investment.
Do not exceed 45 psig when used in air-powered caulking guns.
Bulk containers require a larger initial investment in dispensing equipment, but offer the most economical packaging for volume production. Bulk dispensing systems are air-operated extrusion pumps coupled to hand or automated dispensing units. Pumps which are specifically designed for pumping one-component RTV silicone rubber have TEFLON® seals, packings and lined hoses to prevent moisture permeation and pump cure problems.
CLEAN UP AND REMOVAL
Before curing, solvent systems such as naphtha or methyl ethyl ketone (MEK) are most effective. Refer to solvent use warnings in the section on surface preparation.
After cure, selected chemical strippers which will remove the silicone rubber are available from other manufacturers. Specific product information may be obtained on request.
Customers must evaluate Momentive Performance Materials products and make their own determination as to fitness of use in their particular applications.
RTV102, RTV103, RTV106, RTV108, RTV109, RTV112, RTV116 and RTV118 sealants are compositionally compliant with the requirements of 21 CFR 177.2600 – Rubber articles intended for repeated use and have been found, through testing of a representative sample, to meet the extractives limitations in 21 CFR 177.2600(e) and/or (f).
Note: It is the responsibility of the user to determine that the final product complies with the extractive limitations and other requirements of 21 CFR 177.2600 under their specific manufacturing procedures.
A representative sample of RTV 108 has passed USP Class VI (United States Pharmacopoeia USP 23, National Formulary 18, 1995).
A representative sample of RTV 118 has passed USP Class VI (United States Pharmacopoeia USP 23, National Formulary 18, 1995).
RTV102, RTV103, RTV106, RTV108, RTV109, RTV112, RTV116 and RTV118 sealants may be used on equipment which may contact edible products in official establishments operating under the Federal meat and poultry products inspection program. See USDA letter of Authorization.
NSF INTERNATIONAL STATUS
NSF International lists RTV102, RTV103, RTV106, RTV108, RTV109, RTV112, RTV116 and RTV118 sealants under NSF International Standard No. 51 (Plastic Materials and Components for Use in Food Equipment), as satisfactory for use on food contact surfaces.
RTV102, RTV103, RTV106, RTV108, RTV109, RTV112, RTV116 and RTV118 silicone rubber adhesive sealants are recognized by Underwriters Laboratories, Inc., under their Component Recognition Program
(UL File No. E-36952).
General Purpose Paste: RTV102, RTV103, RTV108, RTV109
General Purpose Flowable: RTV112, RTV118
High Temperature Paste: RTV106
High Temperature Flowable: RTV116
Testing for referenced MIL Spec is performed in accordance with current Momentive Performance Materials
quality test methods, laboratory conditions, and procedures, frequency and sampling, which are not necessarily identical with the methods, conditions, procedures, frequency and sampling stated or referenced in the listed specification. Any certification will be limited to listed properties and will not imply or state conformity to any other aspect of the referenced specification, including but not limited to marking, packaging, bar coding, testing, or sampling. Contact Momentive Performance Materials for a comparison review.
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SUBSIDIARIES AND AFFILIATES (COLLECTIVELY “SUPPLIER”), ARE SOLD SUBJECT TO SUPPLIER’S
STANDARD CONDITIONS OF SALE, WHICH ARE INCLUDED IN THE APPLICABLE DISTRIBUTOR OR OTHER
SALES AGREEMENT, PRINTED ON THE BACK OF ORDER ACKNOWLEDGMENTS AND INVOICES, AND AVAILABLE UPON REQUEST. ALTHOUGH ANY INFORMATION, RECOMMENDATIONS, OR ADVICE CONTAINED HEREIN IS GIVEN IN GOOD FAITH, SUPPLIER MAKES NO WARRANTY OR GUARANTEE, EXPRESS OR
IMPLIED, (i) THAT THE RESULTS DESCRIBED HEREIN WILL BE OBTAINED UNDER END-USE CONDITIONS, OR (ii) AS TO THE EFFECTIVENESS OR SAFETY OF ANY DESIGN INCORPORATING ITS PRODUCTS, MATERIALS, SERVICES, RECOMMENDATIONS OR ADVICE. EXCEPT AS PROVIDED IN SUPPLIER’S STANDARD CONDITIONS OF SALE, SUPPLIER AND ITS REPRESENTATIVES SHALL IN NO EVENT BE RESPONSIBLE FOR ANY LOSS RESULTING FROM ANY USE OF ITS MATERIALS, PRODUCTS OR SERVICES DESCRIBED HEREIN
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provision of Supplier’s standard Conditions of Sale or this Disclaimer, unless any such modification is specifically agreed to in a writing signed by Supplier. No statement contained herein concerning a possible or suggested use of any material, product, service or design is intended, or should be construed, to grant any license under any patent or other intellectual property right of Supplier covering such use or design, or as
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