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> Translucent silicone rtv mold making rubber compound
Translucent silicone rtv mold making rubber compound
1 Gallon Unit Translucent tin cured silicone rubber - Shore 27A hardness
10:1 mix ratio by weight - scale required. Net Weight : 9.9 Lbs.
Brand New. Never Opened. Fresh Product
Tin-based silicones, also called condensation-cure silicones, are two-component materials which cure at room temperature (RTV) to flexible, high tear-strength rubbers. Tin cured silicones can be poured onto models or they can be made brushable by adding a thixotropic additive. They are ideal for molds where easy release or high temperature resistance is required. Tin cured silicones can be used for casting polyurethane, epoxy and polyester resins, waxes, all gypsum products and low-temperature metals.
Mold Max Silicones will reproduce the finest detail and are suitable for a variety of industrial and art related applications including making molds for reproducing prototypes, furniture, sculpture and architectural elements. Mold Max silicones can also be used to cast a variety of materials including wax, gypsum, low melt alloys/metals and urethane, epoxy or polyester resins (without using a release agent).
Mold Max 27T silicone are water white translucent tin cured silicone rubber compounds that have exceptional tear strength and working properties. They feature Libra catalyst for long library life. Mixed 100A:10B by weight, vacuum degassing is recommended for de-airing. Rubber cures overnight at room temperature.
Similar in appearance to premium platinum silicones, Mold Max T silicones are a less costly alternative for creating animatronic skin effects. Mold Max T silicones can be thickened with Thi-Vex IIthickener for brush-on application and effects. An infinite number of color effects can be achieved by adding silicone pigments or effects powders.
Mold Max T series silicones are also good for making molds used for casting plaster and wax.
Cure Time: 24 hrs (optional: follow with post cure)
Dielectric Strength (V/mil) (ASTM D-147-97a): >500
Useful Temperature Range: -65 F to 400 F (-19 C to 205 C)
Store and use material at room temperature (73 F/23 C). Storing material at warmer temperatures will also reduce the usable shelf life of unused material. These products have a limited shelf life and should be used as soon as possible.
Applying a Sealer / Release Agent Mold Max rubber may be inhibited by sulfur base clays resulting in tackiness at the pattern interface or a total lack of cure throughout the mold. If compatibility between the rubber and the surface is a concern, a small-scale test is recommended. Apply a small amount of rubber onto a non-critical area of the pattern. Inhibition has occurred if the rubber is gummy or uncured after the recommended cure time has passed. To prevent inhibition, a barrier coat of clear acrylic lacquer sprayed directly onto the pattern is usually effective. Allow to thoroughly dry. Although not usually necessary, a release agent will make demolding easier when casting into or over most surfaces.
Before you begin, pre-mix Part B thoroughly to re-disperse pigments that may have settled. After dispensing required amounts of Parts A and B into mixing container, mix thoroughly for 3 minutes making sure that you scrape the sides and bottom of the mixing container several times. After mixing parts A and B, vacuum degassing is recommended to eliminate any entrapped air in pourable Mold Max rubber. Vacuum material for 2-3 minutes (29 inches of mercury), making sure that you leave enough room in container for product expansion.
Curing / Post Curing - Allow the mold to cure overnight (at least 16 hrs) at room temperature (73 F / 23 C) before demolding. Post curing the mold will eliminate any residual moisture and alcohol that is a by-product of the condensation reaction that can inhibit the cure of some urethane resins and rubbers. Allow mold to cool to room temperature before using. Do not cure rubber where temperature is less than 65 F /18 C
Thickening Mold Max Silicones For Brush-on Application
THI-VEX is made especially for thickening Mold Max silicones for vertical surface application (making brush-on molds). Different viscosities can be attained by varying the amount of THI-VEX
