VFI-3004 60 A Polyurethane Casting Rubber

VFI-3004 60 A Polyurethane Casting Rubber is a fast-setting, two-component urethane rubber with easy processing capabilities for injecting parts and castings. The material’s low viscosity allows you to make parts of varying sizes that maintain final physical properties. VFI-3004’s fast-setting capabilities allow you to demold in 10 minutes for improved part production. It has great properties that make it stain, antimicrobial, and impact-resistant urethane rubber with a smooth, glossy finish. With many base pigments available, the rubber can be easily pigmented, allowing for the adjustment and addition of colors. This durable rubber has been used in various molding and casting applications including table edging.

Physical Properties	Test Method	Test Results
Hardness Shore A	ASTM D2240	60 A
Tensile Strength	ASTM D412	710 psi
Elongation	ASTM D412	300%
Tear Strength	ASTM D624	70 pli

Physical Properties

Test Method

Test Results

Hardness Shore A

ASTM D2240

60 A

Tensile Strength

ASTM D412

710 psi

Elongation

ASTM D412

300%

Tear Strength

ASTM D624

70 pli

Liquid Properties	Test Method	Test Results
Mixed Solids by Volume	ASTM D2697	100%
Mixed Liquid Density	ASTM D2939	8.58 lbs/gal
Specific Gravity A Side	N/A	1.185 g/mL
Specific Gravity B Side	N/A	0.968 g/mL
Mixed Specific Gravity	N/A	1.03 g/mL
Ratio by Volume (A:B)	N/A	100A:259.87B
Ratio by Weight (A:B)	N/A	100A:214.04B
Viscosity A Side	ASTM D2196	650 cps
Viscosity B Side	ASTM D2196	600 cps
Pot Life	N/A	150 seconds
Gel Time	N/A	165 seconds
Tack Free	N/A	200 seconds
Demold Time	N/A	10 minutes
Full Cure	N/A	5 days
VOC	N/A	0

Thickness Requirements

VFI recommends using a different material with a longer working time for parts requiring more than 3 minutes of gel.

Mold Preparation

Ensure all surfaces are clean and free of oils, dirt, debris, and other contaminants. The molding surface must be sealed and covered with a release agent for ease of demolding. Release agents are required to help prevent unwanted adhesion and prolong the life of the mold. Compatible molds for injecting include urethane, metal, and platinum silicone when prepared properly. Heating the mold between 70°F-150°F can accelerate the curing process, allowing for faster demolding. However, increasing the surface temperature beyond 72°F will shorten the pot life.

Mixing

The B side (Poly) material must be premixed before using VFI-3004. The material’s short working time only allows for injection molding applications. A proportioner is required to inject the material.

Post-Cure

The casting can be demolded after curing for at least 10 minutes at room temperature. The part does not have to be post-cured to achieve full properties and will obtain these properties after 5 days. You can achieve full physical properties faster if you post-cure the material in an oven at 150°F for 16 hours.

Storage/Shelf Life

Store between 60°F – 90°F in a clean, dry building. The shelf life of unopened containers is 12 months after the date of manufacture. Once open, use it immediately. If you plan to store the material after opening, both sides must be nitrogen purged.

Precautions

VFI-3004 contains isocyanate in the A side material and may irritate the skin. It is also toxic if inhaled as particulate matter. Avoid prolonged breathing of vapors and repeated skin contact. Use only with adequate ventilation. Do not thin or add foreign material to the product. See Safety Data Sheet for complete safety instructions.