A fine additive that slows the setting time of gypsum, plaster, and cement products. Ideal for lifecasting and mold-making, it offers more working time and control without affecting final strength. Use sparingly—only small amounts are needed.
(€ 2.90 without 21% VAT)
Gypsum Retarder is a high-quality additive specially formulated to slow down the setting time of gypsum, plaster, or cement-based materials without affecting their final strength or finish. Ideal for artists, mold makers, and special effects professionals, it provides greater flexibility and control when working with fast-setting products such as plaster bandages, casting plasters, or gypsum cements like Ultracal 30.
By extending the pot life and working time, Gypsum Retarder allows for more detailed sculpting, smoother pours, and reduced waste—especially useful in large or complex molds. It helps achieve consistent results under varying ambient temperatures and mixing conditions.
Usage: Mix the retarder thoroughly with the dry plaster or dissolve it in the mixing water before adding the powder. Adjust the quantity depending on the desired delay—only a small amount (typically 0.1–0.3% of total plaster weight) is needed.
Note: Always test small batches first to determine the ideal dosage, as excess retarder can prevent full setting.
Pack size: 50 g.
A fine additive that slows the setting time of gypsum, plaster, and cement products. Ideal for lifecasting and mold-making, it offers more working time and control without affecting final strength. Use sparingly—only small amounts are needed.
ULTRACAL 30 is a super-strength gypsum cement ideal for patternmaking, offering high accuracy and surface hardness with minimal expansion. Remember to weigh water first and add the powder to it. All times are approximate, influenced by water and ambient temperature.
High-quality gypsum for lifecasting, sculpting, and molding. Offers excellent detail reproduction and a smooth finish. Available in a 25 kg package, suitable for large projects.
High-quality, fast-setting plaster bandage ideal for lifecasting and SFX work. With a 3.5-minute working time, it applies smoothly, conforms easily, and sets into a strong, lightweight shell. Perfect for creating durable mother molds over alginate or silicone.
CALCAST® 200 is a semi-hard plaster combining cost-effectiveness with hardness. Ideal for casting decorative items, wall bricks, panels, and ornaments. Available for pick-up in Amsterdam. Note: Weigh water first, add powder to water. Times are approximate, affected by temperature.
High-quality, fast-setting plaster bandage ideal for lifecasting and SFX work. With a 3.5-minute working time, it applies smoothly, conforms easily, and sets into a strong, lightweight shell. Perfect for creating durable mother molds over alginate or silicone.
Cellona plaster bandage splints are ideal for making quick support shells on alginate, body double, or silicone brush-up molds, offering lightweight, sturdy, and easy-to-use reinforcement.
Instructions for using MarbleCast gypsum: Mix plaster with water, soak briefly, and mix mechanically. Set begins in 10 min and ends in 13 min with hardening by 30 min. Always add powder to water, not the reverse. Times may vary with temperature.
| Product | Expansion | Mix Ratio By Volume | Mix Ratio By Weight | Expansion | Weight | Mix Ratio | Set Time | Product Name |
|---|---|---|---|---|---|---|---|---|
| Gypsum Retarder | - | - | - | - | - | - | - | - |
| UltraCal | Lowest of any rapid-setting gypsum cement | 38 parts water by weight per 100 parts plaster | 50 lbs | Lowest of any rapid-setting gypsum cement | 50 lbs | 38 parts water by weight per 100 parts plaster | 25-35 min. | Ultracal-30 |
| PlasterCast | - | - | - | - | - | - | - | - |
| Plaster Bandage 5 roll Package | - | - | - | - | - | - | - | - |
| CalCast | - | - | - | - | - | - | - | - |
| Plaster Bandage Single | - | - | - | - | - | - | - | - |
| Plaster Splints | - | - | - | - | - | - | - | - |
| MarbleCast | - | - | - | - | - | - | - | - |