VFI®-4174 75 D Fast Casting Plastic

Features & Benefits

• Capable of casting at a thickness of 1/8 of an inch
• Extremely fast-setting material for quick turnaround on part making
• Compatible with rigid foams to make backfilled parts
• Produces durable and repeatable castings
• Neutral color that can easily be painted and primed after full cure
• Capable of being sanded and machined to a smooth, exact finish

Instructions for Use:  

Mold Preparation  

A release agent is recommended for any molding application to extend the life of the mold, and for prototyping urethane molds, it is a requirement. Heated molds are not recommended for this product or any mold over 120°F. Do not use a two-part closed mold. Recommended mold materials include tin or platinum silicone.

Casting Process  

Thoroughly mix the POLY “B” component before mixing with the ISO “A” component. Usually, this takes a minimum of 3 minutes per “B” contianer with proper mixing equipment. Once the “B” component is thorughly mixed, properly pour 87.18 parts of “A” component into 100 parts of “B” component by volume, 1 part “A” component to 1 part “B” component by weight. Thoroughly mix for at least 30 seconds while ensuring that mix is uniform and homogenous.

We recommend pouring VFI-4174 at a minimum thickness of 1/8 inch with a maximum thickness of 2 inches. Anything thinner than 1/8″ will require post-curing at 150°F for a minimum of 2 hours.

If pouring at less than 1/8″ or not backing with foam, it must be post-cured at 150°F for a minimum of 2 hours. Castings should be kept in the mold until fully cured to prevent warping. Demold time is dependent on the volume of material used and pour thickness. Thin-walled parts may not cure as well without heat. Regardless of thickness, it will reach full properties within 3 days of curing.

Safety  

*Always read the safety data sheet before working with chemicals   

Use chemicals only as directed and for their intended purpose. Do not dispose of chemicals down the drain. Most chemicals must be disposed of as hazardous waste. 

PPE to avoid all unnecessary exposures:  

• Eye protection – wear approved safety glasses and any additional eye protection as necessary 
• Hand protection – wear chemically resistant protective gloves (nitrile, butyl, or neoprene) 
• Skin and body protection – wear suitable protective clothing 
• Respiratory protection – in case of insufficient ventilation, wear suitable respiratory equipment. Respirator selection must be based on known or anticipated exposure levels, the hazards of the product, and the safe working limits of the selected respirator 

Product Limitations  

This product contains isocyanate, which may irritate the skin and is toxic if inhaled as particulate matter. Avoid prolonged breathing of vapors or repeated skin contact. Use only with adequate ventilation.

• Incompatible materials – A side: water, alcohols, amines, bases, and acids. B side: oxidizers 
• Conditions to avoid – heat and incompatible materials  
• Chemical stability – stable under normal storage conditions  
• Reactivity & hazardous reactions – no dangerous reaction known under normal use 
• Hazardous decomposition products – A side: carbon monoxide, carbon dioxide, nitrogen oxides, hydrocarbons, and HCN. B side: may include, and are not limited to, oxides of carbon 

Potential Health Hazards  

• May cause stomach distress, nausea, or vomiting if swallowed.  
• May cause respiratory tract irritation. A side may cause allergy and asthma symptoms or breathing difficulties if inhaled.  
• May cause skin irritation or sensitization: redness, edema, drying, defatting, and cracking of the skin. 
• Causes serious eye irritation: discomfort, pain, excess blinking and tear production, marked redness, and swelling of the conjunctiva.  

*If you are experiencing any of these symptoms, seek medical advice or attention. Call a poison control center or doctor if swallowed.

Click here for more information on the full technical data sheet.