Crystal Clear™ 200 is a water white clear and made specifically for applications that require clarity. These rigid urethane casting resins differ only in working and demold times. Low viscosity ensures easy mixing and pouring. Crystal Clear™ resins cure at room temperature with negligible shrinkage.

Features

Cured castings are:

• UV Resistant
• Not brittle

Vibrant colors and color effects are achieved by adding pigment dispersions.

Applications include:

• Encapsulation
• Making prototype models
• Lenses
• Sculpture reproductions
• Decorative cast pieces
• Jewelry
• Prototype models
• Special effects
• Props

Instructions

Safety – Store and use at room temperature (73°F / 23°C). These products have a limited shelf life and should be used as soon as possible. Environmental humidity should be as low as possible. Good room size ventilation is essential. Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk. Wearing a NIOSH approved respirator will minimize inhalation of residual fumes. Use in a low humidity environment (below 50% RH). Mixing containers should have straight sides and a flat bottom. Mixing sticks should be flat and stiff with defined edges for scraping the sides and bottom of your mixing container.

Selecting A Mold Rubber – Pour into a urethane rubber mold (Vytaflex™ urethane or Brush-On™ series urethane – release agent required), tin cured silicone mold such as Mold Max™ 20, 25, 30 or Mold Max™ STROKE (not Mold Max™ ‘T’ Series), or Mold Star™ 15, 16 or 30 platinum cured silicone (not Mold Star™ ‘T’ Series). Do not use other rubber mold products.

If using Mold Max™ silicone, to prevent cure inhibition, post-cure newly cured silicone mold for 8 hours at 150°F / 60°C and let cool prior to casting resin. If you are unsure about surface compatibility, a small scale trial casting should be made.

For Best Results Before Pouring Crystal Clear™ Into Mold: Pre-heat rubber mold at 212°F / 100°C for 4 hours. This minimizes chances of fish-eyeing, suck back, corner rounding, and large bubbles.

Casting Thickness & Cure Time – The cure time and ultimate shrinkage will vary depending on mass concentration, casting thickness, and mold configuration. Castings resist UV yellowing but may darken over time.

• Crystal Clear™ 200: ½” to 3” thickness, maximum 16 lbs. Castings thicker than 3” should be layer cast.
• Crystal Clear™ 202: Thin section casting up to ½”.
• Crystal Clear™ 204: Cast up to 6” thick, maximum 35 lbs.
• Crystal Clear™ 206: For castings greater than 6”.

MEASURING & MIXING

Liquid urethanes are moisture sensitive and will absorb atmospheric moisture. Use clean metal or plastic containers. Materials should be stored and used at 73°F / 23°C. Stir or shake Part B thoroughly before dispensing.

Measuring – Mixing ratio is 100A:90B by weight. Use an accurate digital gram scale. Do not measure by volume.

Mixing – Mix slowly but thoroughly for at least 90 seconds. Scrape sides and bottom of container frequently. Add pigment or filler to Part B before combining with Part A.

Vacuum degassing greatly reduces bubbles. Pump must pull a minimum of 29 inches of mercury (1 bar). Vacuum until material rises, collapses, then hold for one additional minute.

POURING, CURING & PERFORMANCE

Pouring – Pour material in a single spot at the lowest point of the mold. Do not pour directly over encapsulated objects. Allow material to seek its level to minimize air entrapment.

For best results, use pressure casting at 60 PSI for the full cure time.

Castings will reach full physical properties in 7 days at room temperature. Early demolding may cause surface tackiness, removable by heating at 150°F / 65°C for 6 hours.

Post Curing – Post curing improves heat resistance and UV performance. After full room-temperature cure, heat for 6 hours at 150°F–160°F (65°C–72°C). Allow casting to cool before demolding.

Because no two applications are quite the same, a small test application is recommended to determine suitability.

CAUTION: NOT FOR HOME USE. THIS PRODUCT IS FOR INDUSTRIAL USE ONLY. With adequate local exhaust ventilation, respiratory protection is not normally required when using this product. Where risk assessment shows air-purifying respirators are appropriate, follow OSHA respirator regulations and European Standards EN 141, 143 and 371. Protective clothing (gloves and long sleeves) is required to minimize the risk of dermal sensitization. If breathing is affected or a dermal rash develops, immediately cease using this product and seek medical attention. Read SDS before using.

IMPORTANT: Shelf life is reduced after opening. Use remaining product as soon as possible. Replace lids immediately after dispensing. XTEND-IT™ Dry Gas Blanket significantly extends shelf life of unused liquid urethane products.