{"product_id":"task-4","title":"TASK™ 4","description":"\u003cp\u003e\u003cstrong\u003eTASK™ 4\u003c\/strong\u003e is a unique polyurethane casting resin that is very strong when cast in Ultra-Thin sections ranging from 0.03” to 0.50”(0.075cm to 1.27cm). \u003cstrong\u003eTASK™ 4\u003c\/strong\u003e has a very low mixed viscosity, ensuring flawless pick-up of even the finest detail. Cured plastic exhibits very low shrinkage which is why this plastic has become a favorite of prototype and design professionals throughout the world. Pot life is 20 minutes and cure time is 16 hours at 73°F\/23°C.\u003c\/p\u003e\r\n\u003cp\u003eVibrant colors and color effects are possible by adding \u003cstrong\u003eSO-Strong™\u003c\/strong\u003e color tints. Fully cured models made from\u003cstrong\u003e TASK™ 4 \u003c\/strong\u003eare tough, durable, machinable and paintable. They resist moisture and mild solvents. Applications for\u003cstrong\u003e TASK™ 4\u003c\/strong\u003e include making prototype and architectural models, model toys, durable miniatures, ultra-thin mechanical parts and special effect props.\u003c\/p\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shoplightspeed.com\/shops\/606431\/files\/52866387\/task4specs.png\" alt=\"\" width=\"405\" height=\"810\"\u003e\u003c\/p\u003e\r\n\u003cp\u003eInstructions\u003c\/p\u003e\r\n\u003cp\u003eMaterials should be stored and used in a warm environment (73° F \/ 23° C). This product has a limited shelf life and should be used as soon as possible. All liquid urethanes are moisture sensitive and will absorb atmospheric moisture. Mixing tools and containers should be clean and made of metal, glass or plastic. Mixing should be done in a well-ventilated area. Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eBecause no two applications are the same, a small test application to determine suitability for your project is recommended if performance of this material is in question.\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eApplying A Release Agent\u003c\/em\u003e\u003c\/strong\u003e - A release agent is necessary to facilitate demolding when casting into or over most surfaces. Use a release agent made specifically for mold making (\u003cstrong\u003eUniversal™ Mold Release \u003c\/strong\u003eor Mann’s \u003cstrong\u003eEase Release™ 200\u003c\/strong\u003e available from Smooth-On or your SmoothOn distributor). A liberal coat of release agent should be applied onto all surfaces that will contact the plastic.\u003c\/p\u003e\r\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eIMPORTANT: \u003c\/strong\u003e\u003c\/em\u003eTo ensure thorough coverage, apply release and brush with a soft brush over all surfaces. Follow with a light mist coating and let the release agent dry for 30 minutes.\u003c\/p\u003e\r\n\u003cp\u003eSmooth-On silicone rubber molds usually do not require a release agent unless casting silicone into the mold. Applying a release agent will prolong the life of the mold.\u003c\/p\u003e\r\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMeasuring\u003c\/strong\u003e\u003c\/em\u003e - The proper mixing ratio of \u003cstrong\u003eTASK™ 4\u003c\/strong\u003e is 100 Parts A to 100 Parts B by weight. You must use an accurate scale (gram scale or triple beam balance scale) to weigh these components properly. Dispense the required amount of Part A into a mixing container. Weigh out the appropriate amount of Part B and combine with Part A.\u003c\/p\u003e\r\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMixing\u003c\/strong\u003e\u003c\/em\u003e - Materials should be stored and used in a warm environment (73° F \/ 23° C). \u003cstrong\u003eYou must stir Part A \u0026amp; Part B before using. \u003c\/strong\u003eAdd Part A to Part B and mix thoroughly. Stir slowly and deliberately making sure that you scrape the sides and bottom of the mixing container several times. Be careful not to splash low viscosity material out of container.\u003c\/p\u003e\r\n\u003cp\u003eIf tinting or pigmenting\u003cstrong\u003e TASK™ 4,\u003c\/strong\u003e add the tint or pigment dispersion to Part B and mix thoroughly before adding Part. A.\u003c\/p\u003e\r\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eIMPORTANT: \u003c\/strong\u003e\u003c\/em\u003eShelf life of product is reduced after opening. Remaining product should be used as soon as possible. Immediately replacing the lids on both containers after dispensing product will help prolong the shelf life of the unused product. \u003cstrong\u003eXTEND-IT™ Dry Gas Blanket\u003c\/strong\u003e (available from Smooth-On) will significantly prolong the shelf life of unused liquid urethane products.\u003c\/p\u003e\r\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePouring\u003c\/strong\u003e\u003c\/em\u003e - If casting \u003cstrong\u003eTASK™ 4\u003c\/strong\u003e into a rubber mold, pour mixture in a single spot at the lowest point of the mold. If encapsulating an object, do not pour the mixture directly over the object.\u003c\/p\u003e\r\n\u003cp\u003ePour mixture in a single spot at the lowest point of the mold. If encapsulating an object, do not pour the mixture directly over the object. Let the mixture seek its level. A uniform flow will help minimize entrapped air.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eFor Best Results . . . \u003c\/strong\u003eBest results are obtained using a pressure casting technique. After pouring the mixed compound, the entire casting assembly (mold, dam structure, etc.) is placed in a pressure chamber and subjected to 60 PSI (4.2 kg\/ cm2) air pressure for 16 hours.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eCuring - \u003c\/em\u003eImportant:\u003c\/strong\u003e Use this product with at least room size ventilation or in proximity to a forced outlet air vent and do not inhale\/breath fumes. Fumes, which may be visible with a significant mass concentration, will quickly dissipate with adequate ventilation. Castings with significant mass may be hot to the touch and irritate skin immediately following cure. Let casting cool to room temperature before handling.\u003c\/p\u003e\r\n\u003cp\u003eDemold time of the finished casting depends on mass and mold configuration. Low mass or thin-walled castings will take longer to cure than castings with higher mass concentration.\u003c\/p\u003e\r\n\u003cp\u003eIf making rotational or hollow castings, backfilling with a rigid foam (\u003cstrong\u003eFoam-iT! 5\u003c\/strong\u003e or other) will provide lightweight reinforcement. Foam backfilling is recommended if castings will be subjected to temperatures above 85°F \/ 30°C.\u003c\/p\u003e\r\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePost Curing\u003c\/strong\u003e\u003c\/em\u003e - Castings will reach “full cure” faster and achieve maximum physical properties \/ heat resistance if \u003cstrong\u003eTASK™ 4\u003c\/strong\u003e is heat post cured in a dedicated shop oven. Post curing is recommended if castings are thin or of low mass concentration. Castings should be post cured in a mold or support structure. Allow the material to fully cure at room temperature followed by 4 hours at 150°F (65°C). Casting should be allowed to cool to room temperature before handling.\u003c\/p\u003e\r\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePerformance\u003c\/strong\u003e\u003c\/em\u003e - Cured castings of \u003cstrong\u003eTASK™ 4\u003c\/strong\u003e are rigid and durable. They resist moisture, moderate heat, solvents, dilute acids and can be machined, primed\/ painted or bonded to other surfaces (any release agent must be removed). Castings can be displayed outdoors after priming and painting.\u003c\/p\u003e\r\n\u003cp\u003e\u003ca href=\"https:\/\/www.smooth-on.com\/msds\/files\/Task_4.pdf\" target=\"_blank\" rel=\"noopener\"\u003eSDS\u003c\/a\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003ca href=\"https:\/\/www.smooth-on.com\/tb\/files\/TASK_4_TB.pdf\" target=\"_blank\" rel=\"noopener\"\u003eTDS\u003c\/a\u003e\u003c\/p\u003e","brand":"Smooth-On","offers":[{"title":"Trial Kit (2 lbs. \/ 0.91 kg.)","offer_id":48015765340475,"sku":"47044","price":27.99,"currency_code":"USD","in_stock":false},{"title":"2 Gallon Kit (16 lbs. \/ 7.26 kg.)","offer_id":48015765373243,"sku":"47061","price":136.99,"currency_code":"USD","in_stock":false},{"title":"10 Gallon Kit (80 lbs. \/ 36.29 kg.)","offer_id":48015765406011,"sku":"47071","price":554.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/7539\/6411\/files\/task4combo.jpg?v=1748637507","url":"https:\/\/maacaffestore.com\/products\/task-4","provider":"The Compleat Sculptor, Inc","version":"1.0","type":"link"}