VFI®-4110 70 D Trowelable Paste

Features & Benefits

• Offers a fast cure time to be able to cast on the same day
• Can be pigmented or painted if desired
• Can be used as a repair material to fix cracked support shells

Instructions for Use:

Surface Preparation

All surfaces should be clean, dry, and free of dirt, dust, and debris. Release agents are required for any molding application to prevent adhesion and extend the life of the mold. We recommend using a silicone-based release or wax over the molding surface before application. This material is compatible with silicone, latex, and other molding rubbers when properly prepared.

If you are making a support shell with two or more pieces, use a separation material around the molded object, like moldable shims or clay.

Application Guidelines

Bring the material to at least 65°F before use. The B side (Poly) must be premixed to disperse any settled material. Avoid introducing extra moisture or air into the mix. The A side (Iso) does not need to be mixed.

Pour 1 part of the A component into 2 parts of the B component by volume, 61.8 parts A component to 100 parts B component by weight. Mix the material with a flat mixing stick by occasionally scraping the sides and bottom of the mixing container. Use power mixing equipment for volumes over one quart in size. The mixture will start as a golden yellow and slowly become off-white once fully mixed. Transfer to a new, clean container and mix again to achieve a thorough, uniform mix. Mixing and application must be completed before the 15-minute pot life ends.

The material should be used at room temperature (77°F) with low humidity. Warmer temperatures will decrease the pot life but accelerate the cure time. The material can be applied using a paint stick or paintbrush to cover the surface and smooth the material down. Additional material can be mixed up and applied as needed.

The shell can be removed from the mold after 90 minutes at room temperature. A hammer and chisel may be needed to separate and pry apart multiple shell sections. At this time, both the mold and support shell can be reassembled for casting purposes. Large support shells may need to be fastened together to prevent distortion while casting.

If you plan to machine it, use an approved mask or respirator to avoid breathing in dust particles.

Full physical properties will develop in 24 hours at room temperature. If you want to speed up the cure, the material can be heated in an oven at 100°F for 8 hours. Do not exceed temperatures above 120°F.

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  

VFI-4110 contains isocyanate, which is irritating to the skin and toxic if inhaled. It can be harmful if swallowed and cause eye irritation, allergies, or asthma symptoms. Avoid prolonged breathing of vapors and repeated skin contact. It is not UV stable and does not have any long-term UV testing.   

• Incompatible materials – 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 – may include, and are not limited to, oxides of carbon

Potential Health Hazards  

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

*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.