Two Part RTV for Mold-Making

We, Silica House Pvt Ltd. are the distributor of M/s Wacker Metroark Chemicals Pvt. Ltd. offer RTV Silicone Rubber for mold-making. RTV Silicone Rubber for mold-making is an excellent material that can be used to make replicas with a wide variety. RTV silicone rubber can be counted on to precisely reproduce the shape of the original model.

Due to the ease of with RTV silicone rubber, it is used widely for producing replicas in industrial applications or even just for fun. RTV Silicone Rubber cures at room temperature.

Specific features • Condensation-curing • Two-component

Types of RTV Silicone Rubber

Transparent RTV Silicone Rubber: More Hardness than White colored Silicone Rubber, used to make moldings of car designs / car parts designs/ shoe molds

High quality 2 Part Silicone Mold Making Rubber , RTV 2 Liquid Silicone Rubber Molding.

White Color RTV Silicone Rubber: It is used to make molding of Statue, Toys, Candles. And Pad printing etc.

Characteristics

1 Workability Make silicone rubber molds easily and quickly by mixing the base compound with a curing agent and then pouring it into a mold. The workable time and the cure time can both be adjusted as necessary 2 Ease of mold release Mold releasing agents such as soapy water or wax are unnecessary because molds made of RTV silicone rubber release easily from the master or cast parts on their own. 3 Dimensional stability Molds made with RTV silicone rubber exhibit very little shrinkage and superior dimensional stability. 4 Flowability RTV silicone rubber can faithfully reproduce the finest of details in the master such as fingerprints and wood grain because of its superior flowability. 5 Heat and chemical resistance Moldmaking RTV silicone rubber exhibits excellent resistance to both heat and chemicals 6 Deep section curability Moldmaking RTV silicone rubber cures uniformly throughout the mold, irrespective of thickness. 7 Non-exothermic Moldmaking RTV silicone rubber cures at room temperature. In addition, since no heat is generated during the curing process, the RTV silicone rubber does not adversely affect the master.

Mold-making methods

Molds Methods Processes Applications Pouring Process

A mold is made by pouring the RTV Fine handicrafts, furniture parts, silicone rubber directly onto the ornaments and welder moldings master. This process offers the

advantages of having few steps and

A silicone rubber mold is requiring a minimal amount of time. created from a master Lamination process (skin molding and then material such as method) liquid resin or gypsum is poured into the cured A mold is made by laminating the mold to make a replica. silicone rubber onto the master to GeneralMolds Reproduction of art works, creating create a skin of an even thickness molds of large items and molds of and then it is reinforced with a three-dimensional figures material such as gypsum or resin. The process offers the advantages of requiring a minimal amount of silicone rubber and yielding a lightweight mold. Inverted molds used in electroforming A silicone rubber mold is

created from a master Automotive parts and toys into which liquid resin, Master – silicone rubber mold – resin paraffin or gypsum is mold electroforming – electrocasting poured to make a replica mold of the master. This Lost wax mold method is used to create Precision cast parts and cast Master- silicone rubber mold - wax molds which are then ornaments such as golf club heads mold - sand mold - casting. used to create subsequent molds as part Inverted molds made from low-

InvertedMolds of the inversion process. temperature composite These subsequent molds are used to create simple Master - silicone rubber mold - heat- Food samples and toys metal molds and sand resistant gypsum mold - injection molds mold.

Vacuum pouring process

Master - pour RTV silicone rubber A high-precision silicone inside a vacuum Tank - after the

rubber mold is created curing is finished, the rubber is cut

using a vacuum casting open using a surgical scalpel to device. The mold is create a split mold - the split mold is

Molds placed into a vacuum placed again in the vacuum tank and Prototype models of small-lot resin tank and a liquid resin a liquid resin is poured into the mold moldings, automotive parts, such as urethane or under a vacuum - the resin is cured in household electrical appliances and is poured into the a thermostatic tank-the cast part is office equipment crevices of the mold removed. under a vacuum to create

HighPrecision a precise resin mold that The vacuum casting process is the produces defect-free optimal method to use when high- parts precision replicas are required. It offers the advantage of cutting the number of days and the cost involved in creating small lot prototypes.

Technical Data

Properties Uncured

Property Condition Value Method

Color - white -

Viscosity, dynamic after 23 °C 25000 mPa·s DIN EN ISO 3219 stirring

Density 23 °C 1.22 g/cm³ -

Catalyzed

(catalyzed with 5 wt % Catalyst T 51, after 4 days at 23 °C / 50 % rel. humidity)

Property Condition Value Method

Viscosity, dynamic 23 °C 20000 mPa·s ISO 3219

Properties Cured

Property Condition Value Method

Density in water 23 °C 1.22 g/cm³ ISO 2781

Hardness Shore A - 12 ISO 868

Tensile strength - 3.5 N/mm² ISO 37

Elongation at break - 600 % ISO 37

Linear shrinkage - < 0.4 % -

Tear strength - > 18 N/mm ASTM D 624 B

These figures are only intended as a guide and should not be used in preparing specifications.

All the information provided is in accordance with the present state of our knowledge. Nonetheless, we disclaim any warranty or liability whatsoever and reserve the right, at any time, to effect technical alterations. The information provided, as well as the product's fitness for an intended application, should be checked by the buyer in preliminary trials. Contractual terms and conditions always take precedence. This disclaimer of warranty and liability also applies particularly in foreign countries with respect to third parties' rights.

Processing

If molds for processing epoxy or resins are to be made is cured by adding 5 wt % Catalyst T 21.

For molds used to process other reproduction materials such as resins, plaster, concrete, synthetic stone, wax or low-melting alloys, 5 wt % Catalyst T 51 should be used.

Pot lifes and curing times of both catalysts may be accelerated, and thus adjusted to suit the individual application by blending with Catalyst T 47. For faster curing either catalyst may be blended with Catalyst T 47. E.g. at a ratio of 95 : 5 (T51 : T47) the pot life decreases to about 30 min, and the mold needs only about 4 h to cure.

The pot life is the period of time at 23 °C / 50 % rel. humidity during which the catalyzed mix to attain a viscosity of 100,000 m Pa s and still be just pourable.

Contact us

SILICA HOUSE PVT LTD. 301, Suneja Tower-II, District Centre Janak Puri, New Delhi-110058 INDIA T: 011-25617557, 45611262, M: +91 7303023955 Website: www.silicahouse.net Email: [email protected], [email protected]