Shell Shock™ FAST

Description

Shell Shock™ FAST thixotropic plastic thickens when mixed and can be applied to various surfaces or rubber molds. 

Mix Parts A and B in the correct ratio (1A:4B by volume or 1A:5B by weight) to cure at room temperature with minimal shrinkage, resulting in a hard, durable plastic with good compressive and flexural strength.

Once fully cured, the castings are rigid and can be sanded, primed, and painted.

Color effects can be achieved by adding SO-Strong Color Tints.

• Ideal for making fast, lightweight rigid molds for silicone appliances and effects, serving as a replacement for stone molds.
• Can be used as a gel coat in rubber molds, backed with rigid foam for detailed, lightweight castings.
• Applicable as an impact-resistant coating on styrofoam (polystyrene), which can be sanded, primed, and painted (minimum of 3 coats recommended).
• Suitable for making rigid support shells for brush-on rubber molds.

Instructions

Preparation

• All liquid urethanes are moisture sensitive and will absorb atmospheric moisture. Avoid using water-based clays.
• Use clean mixing tools and containers made of metal or plastic.
• Store and use materials in a warm environment (22°C).
• Use materials as soon as possible due to limited shelf life.
• Mix in a well-ventilated area. Wear safety glasses, long sleeves, and rubber gloves.
• Conduct a small test application to ensure suitability for your project.

• Use Mann’s Ease Release 200 to facilitate demolding. Apply liberally to all surfaces in contact with the plastic.
• Brush the release agent with a soft brush, then apply a light mist coating. Let dry for 30 minutes.
• A release agent is not needed when casting silicone into a mold, but it eases demolding and prolongs mold life.

1. Pre-mix Part-B before starting.
2. Dispense Parts A and B into a mixing container and mix thoroughly for about 1 minute, scraping the sides and bottom.
3. The material will begin to thicken almost immediately.

• Use a clean brush for each layer. Apply layers until the desired thickness is achieved (1 cm recommended for minimum strength).
• Apply the first coat thinly with a stippling motion to minimize air bubbles.

• Ensure adequate ventilation and avoid inhaling fumes.
• Let castings cool to room temperature before handling.
• Demold time depends on mass and mold configuration; low mass or thin-walled castings take longer to cure.
• For rotational or hollow castings, backfill with rigid foam for lightweight reinforcement.

• Optional post curing increases physical properties. Expose material in the mold to 65°C for 2 hours, then cool to room temperature.

• After sufficient layering, the cured material is rigid, hard, and durable.
• It resists moisture, moderate heat, solvents, and dilute acids, and can be machined, primed, painted, or bonded to other surfaces.
• Allow the material to cure for at least 4 hours at 23°C before sanding or machining.
• Use a dust mask when machining to prevent inhalation of particles.
• Unpainted castings will darken with UV exposure.
• Conduct a small test application to ensure suitability for your project.

Specifications