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Step-By-Step Product Selection Guide Silicone Moldmaking Materials | Europe and Asia Edition

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Step-By-Step Product Selection Guide Silicone Moldmaking Materials | Europe and Asia Edition Step-by-step product selection guide Silicone moldmaking materials | Europe and Asia Edition If you’re looking for an easy-to-use moldmaking material that Each SILASTIC™ moldmaking product consists of two will deliver consistently superior results, look no further. With components: a liquid silicone rubber base and a catalyst or silicone moldmaking materials from SILASTIC™, you can curing agent. There are two basic cure types — condensation create tough-but-flexible molds to reproduce intricate details cure and addition cure. Within each cure type, we offer several and deliver high-quality replicas, again and again. products in a range of viscosities with variable cure times. To identify the product(s) best suited to your application, start Our products can be used with masters made of stone, glass, by using the product selection tree and typical moldmaking wood, metal, wax, ceramic, plaster and clay. And they’re variables chart in step 1 on the next page. compatible with a wide range of casting materials. SILASTIC™ makes a variety of products to meet a variety of needs: Reproduction Creating Molding Architectural • Figurines • Silicone rubber pads • Prototypes fabrication • Jewelry for transfer printing • Furniture • Concrete casting • Artifacts • Robotic skins for • Industrial tooling • Reconstituted stone • Collectibles animated creatures • Crown molding, finials, • Candles brackets and more SILASTIC™ silicone moldmaking materials Step 1 • Are easy to use • Reproduce intricate details Narrow the field to • Hold severe undercuts • Feature excellent release characteristics match your needs • Provide good resistance to most chemicals • Offer tailorable working times and cure rates • Resist tearing with repeated use • Are flexible to reduce demolding and stress problems • Work in a wide range of service temperatures Condensation cure mold making silicone rubbers Addition cure mold making silicone rubbers SILASTIC™ silicone rubbers SILASTIC™ silicone rubbers • For molding figurines, decorative reproduction and making • For engineering design, prototyping, architectural transfer pads fabrication, and making transfer pads • Provide outstanding resistance to inhibition • Use platinum catalyst • Use tin catalyst • Cure can be heat accelerated • Offer variable cure times at room temperature • Exhibit virtually no shrinkage when cured at room temperature • Offer better chemical resistance SILASTIC™ RTV-3110 SILASTIC™ RTV-3481 SILASTIC™ RTV-3496 SILASTIC™ RTV- SILASTIC™ RTV- SILASTIC™ RTV- Mold-Making Base Mold-Making Base Mold-Making Base 4131-P1 Base and 4234-T4 Base and 4260-V Base and General purpose, low High tear strength, low High tear strength, Curing Agent Curing Agent Curing Agent tear strength, medium durometer. Well-suited low durometer, very High tear strength, High tear strength, High tear strength, durometer, low mixed for one-part molds. good resistance to suited for production high durometer, high durometer, suited viscosity, easy to work polyester resin, suited for of print pads, can translucent, suited for for architectural and with, fills tiny crevices, reproduction of figurines. be colored. prototype design. prototype design. vacuum de-airing isn’t always required, white. SILASTIC™ RTV-3112 SILASTIC™ RTV-3483 SILASTIC™ SILASTIC™ RTV- Mold-Making Base Mold-Making Base RTV-4250-S Base 4136-M Base and General purpose, low High tear strength, and Curing Agent Curing Agent tear strength, high low durometer. Well- High tear resistance, low Medium tear durometer, white. suited for one-part molds. durometer, low viscosity, resistance, high high inhibition resistance, durometer, high high elongation. inhibition resistance, demoldable in 16 hours, regal blue. SILASTIC™ RTV-3120 SILASTIC™ RTV-3487 SILASTIC™ RTV-3498 SILASTIC™ RTV- Mold-Making Base Mold-Making Base Mold-Making Base 4251-S2 Base and Low tear strength, high Medium tear strength, High tear strength, Curing Agent durometer, excellent very low durometer, low low durometer, very High tear resistance, heat stability, red. mixed viscosity. Well-suit- good resistance to medium durometer and ed for one-part molds. polyester resin, suited for low viscosity, suited reproduction of figurines. for reproduction of reconstituted stone. SILASTIC™ RTV-3133 Base General purpose, low tear strength, low durometer, white. 2 Typical moldmaking variables Condensation cure products Addition cure products SILASTIC™ RTV Silicone Rubber* 3481 3487 3496 3133 3483 3498 3110 3112 3120 4260-V 4250-S 4136-M 4234-T4 4131-P1 4251-S2 Pattern characteristics Simple, no undercuts ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● Complex, some ● ● ● ● ● ● ● ● ● ● ● undercuts Complex, deep ● ● ● ● ● ● ● ● ● ○ undercuts Vertical surfaces, large or ● ● ● ● ● ● ● ● ● immovable objects Compatibility with casting materials Polyesters ○ ○ ○ ○ ● ● ● ● ● ● ● ● ○ ○ ○ Polyurethane, rigid ○ ○ ○ ○ ● ● ○ ○ ● ● ● ● ● ● ● Polyurethane, foam ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ● ● ● Epoxies ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Low-melt metals ○ ○ ● ○ ○ ○ ○ ○ ○ ○ ● Recommended ○ Can be used * Refer to page 2 for full product names and descriptions. 3 Base/ Step 2 Working and cure times at room Approximate Approximate catalyst temperature (23°C, 73°F) working demold mixing ratio, catalyst or curing agent time1 time2 Take a closer by weight SILASTIC™ RTV-3110 Mold-Making Base look at your SILASTIC™ RTV-3000-F Catalyst 20:1 40 min 80 min SILASTIC™ RTV-3010-S Catalyst 10:1 2 hrs 7 hrs cure options SILASTIC™ RTV-3112 Mold-Making Base Once you’ve narrowed the field to a few SILASTIC™ RTV-3000-F Catalyst 20:1 28 min 100 min materials, it’s time to look at your cure SILASTIC™ RTV-3010-S Catalyst 10:1 1 hr 8 hrs options. SILASTIC™ RTV high strength moldmaking silicone rubbers are SILASTIC™ RTV-3120 Mold-Making Base available with a variety of curing agents SILASTIC™ RTV-3000-F Catalyst 20:1 25 min 1½ hrs to modify working and demold times. SILASTIC™ RTV-3010-S Catalyst 10:1 1 hr 8 hrs For unique conditions we offer: SILASTIC™ RTV-3133 Base • SILASTIC™ RTV-3081-F Mold- SILASTIC™ RTV-3081-F Mold-Making Curing Agent 100:5 30 – 45 min 6 hrs Making Curing Agent for curing SILASTIC™ RTV-3481 Mold-Making Base against sulfur-containing clays SILASTIC™ RTV-3081 Mold-Making Curing Agent 100:5 1.5 – 2 hrs 24 hrs Each SILASTIC™ RTV addition cure silicone rubber base has its own special SILASTIC™ RTV-3081-F Mold-Making Curing Agent 100:5 30 – 45 min 6 hrs curing agent. For best results, these SILASTIC™ RTV-3081-R Mold-Making Curing Agent 100:5 1.5 – 2 hrs 24 hrs products should be used at the specified SILASTIC™ RTV-3081-VF Mold-Making Curing Agent 100:5 8 – 10 min 2 hrs mix ratios. The chart at left can help SILASTIC™ RTV-3483 Kit you determine the mix ratios, working times and cure times most compatible SILASTIC™ RTV-3083 Mold-Making Curing Agent 100:5 1.5 – 2 hrs 24 hrs with your equipment capabilities and SILASTIC™ RTV-3487 Mold-Making Base application requirements. XIAMETER™ RTV-3087-S Mold-Making Curing Agent 100:5 1.5 – 2 hrs 24 hrs SILASTIC™ RTV-3496 Mold-Making Base SILASTIC™ RTV-3081 Mold-Making Curing Agent 100:5 2 – 3 hrs 24 hrs SILASTIC™ RTV-3081-F Mold-Making Curing Agent 100:5 1 – 1.5 hrs 8 hrs SILASTIC™ RTV-3081-R Mold-Making Curing Agent 100:5 2 – 3 hrs 24 hrs SILASTIC™ RTV-3498 Mold-Making Base/SILASTIC™ RTV-3081 Mold-Making Curing Agent SILASTIC™ RTV-3081 Mold-Making Curing Agent 100:5 2 – 3 hrs 24 hrs SILASTIC™ RTV-3081-F Mold-Making Curing Agent 100:5 1 – 1.5 hrs 8 hrs SILASTIC™ RTV-3081-R Mold-Making Curing Agent 100:5 2 – 3 hrs 24 hrs Addition cure SILASTIC™ mold making silicone rubber SILASTIC™ RTV-4131-P1 Base and Curing Agent 10:1 45 min 8 hrs SILASTIC™ RTV-4234-T4 Base and Curing Agents 10:1 1.5 hrs 12 hrs 1 The time it takes for the catalyzed mixture to become nonflowable. SILASTIC™ RTV-4136-M Base and Curing Agent 10:1 1 hr 16 hrs 2 The point at which the rubber can be demolded. SILASTIC™ RTV-4250-S Base and Curing Agent 10:1 45 min 7 hrs These technical characteristics are typical properties. These SILASTIC™ RTV-4251-S2 Base and Curing Agent 10:1 1 hr 6 – 8 hrs values are not intended for use in preparing specifications. SILASTIC™ RTV-4260-V Base and Curing Agent 10:1 1 – 1.5 hrs 6 – 8 hrs Visit www.silastic.com to order these products or to learn more. 4 Step 3 When you’ve determined which products have the general Focus on your specific performance and cure capabilities you need, review the following typical properties charts to see how these products performance objectives match up with the specific properties you require. Typical properties† condensation cure materials SILASTIC™ mold making silicone rubber* RTV-31102 RTV-31122 RTV-31202 RTV-31332 RTV-34812 RTV-34832 RTV-34872 RTV-34962 RTV-34982 As supplied Specific gravity 1.14 1.30 1.45 1.15 1.21 1.16 1.15 1.16 1.23 RTV-3010-S RTV-3010-S RTV-3010-S RTV-3081-F RTV-3081, RTV-3083 RTV-3087-S RTV-3081, RTV-3081, RTV-3081-F, RTV-3081-F, RTV-3081-F, Curing agent used* RTV-3081-R, RTV-3081-R RTV-3081-R RTV-3081-VF As catalyzed Appearance White White Red Beige All white White White Off white Light beige Viscosity, mPa.s 16,000 27,000 30,500 20,000 20,000-36,400 16,000 15,000 11,400-14,600 14,700-17,100 As-cured physical properties1 24, 13, 28, Durometer hardness, 23, 45 58 56 16 13 8 15, 27, shore A, points 19, 12 23 25 4.7, 3.6, 4.9, 4.6, Tensile strength, MPa 2.7 4.4 4.0 3.2 3.9 2.6 3.7, 4.7, 4.6, 4.0 4.9 4.1 544, 689, 537, 543, Elongation, percent 170 127 128 534 680 650 585, 483, 622, 765 568 438 26, 28, 30, Tear strength die B, 24, <5 <7 7 <5 25 13 28, 23, N/mm 26, 27 27 25 Linear shrink, percent 0.2-0.4 0.4-0.6 – 0.2-0.4 0.2-0.4 (all) 0.2-0.4 0.2-0.4 0.2-0.4 (all) 0.2-0.4 (all) † These values are not intended for use in preparing specifications.
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