TASK™ 18

Description

This low-viscosity aluminum-filled urethane casting resin is designed for short-run vacuum forming or thermoforming molds.

TASK™ 18 cures overnight at room temperature with negligible shrinkage to a hard plastic with high compressive and flexural strength.

The cured material can be polished, machined, drilled, and painted.

TASK™ 18 is suitable for industrial production parts, prototype parts, and tracing patterns.

Features

High rigidity
low shrinkage
Excellent for thermoforming or vacuum forming molds and tools

Technical Properties

Mix Ratio: 26A:100B by weight
Working time: 20 minutes
Cure Time: 16 hours
Shore Hardness: 88 D
Specific Gravity: 1.57 g/cc
Specific Volume: 0.64 cm³/g
Color: Metal Gray
Elongation@Break: 1%
Tensile Strength: 22.4 MPa
Tensile Modulus: 3,545 MPa
Flexural Strength: 73.8 MPa
Flexural Modulus: 593 MPa
Compressive Strength: 58 MPa
Heat Deflection Temp: 65°C
Compressive Modulus: 671 MPa
Shrinkage: 0.0015 mm/mm (0.0006 in./in.)
Mixed Viscosity: 4,400 mPa·s

Use Cases

Ideal for making short-run vacuum forming or thermoforming molds, industrial production parts, prototype parts, and tracing patterns.

Instructions

Storage and Handling

Store and use materials in a warm environment (23°C). Use as soon as possible due to limited shelf life. All liquid urethanes are moisture sensitive. Use clean metal, glass, or plastic mixing tools and containers. Mix in a well-ventilated area. Wear safety glasses, long sleeves, and rubber gloves.

Release Agent Application

A release agent is necessary for demolding. Use a mold-specific release agent. Apply a liberal coat and brush with a soft brush. Follow with a light mist coating and let dry for 30 minutes. Silicone rubber molds usually do not require a release agent unless casting silicone into the mold.

Measuring and Mixing

Mixing ratio is 26 Parts A to 100 Parts B by weight. Use an accurate scale. Dispense Part A into a mixing container, weigh Part B, and combine. Stir slowly and scrape the sides and bottom of the container. If tinting, add pigment to Part B before mixing with Part A.

Pouring

Pour mixture in a single spot at the lowest point of the mold. Avoid pouring directly over objects. Use a pressure casting technique for best results. Subject the casting assembly to 4.2 kg/cm² air pressure for 16 hours.

Curing

Ensure adequate ventilation. Do not inhale fumes. Allow casting to cool to room temperature before handling. Demold time depends on mass and mold configuration. Backfilling with rigid foam is recommended for temperatures above 30°C (85°F).

Post Curing

Post curing accelerates full cure and improves properties. Cure for 16 hours at room temperature, then 2 hours at 60°C, followed by 2 hours at 100°C. Allow to cool before handling.

Safety and Warnings

For Industrial Use Only. Keep Out of the Reach of Children.

Specifications

Color	Metal Gray
Mixed Viscocity	4,400 cps
Cure Time	16 hours
Pot Life	20 minutes
Flexural Strength	10,700 psi
Flexural Modulus	86,000 psi
Specific Volume	17.6 cu. in./lb.
Specific Gravity	1.57 g/cc
Mix Ratio By Weight	26A:100B
Shrinkage	0.0006 in. / in.
Tensile Strength	3,250 psi
Elongation At Break	1 %
Shore D Hardness	88
Heat Deflection Temp	149 °F
Compressive Strength	8,420 psi
Tensile Modulus	514,000 psi
Compressive Modulus	97,300 psi

Available in Polyurethane Resin

Product	Cure Time	Specific Gravity	Specific Volume	Tensile Strength	Tensile Modulus	Compressive Strength	Compressive Modulus	Flexural Strength	Shrinkage	Heat Deflection Temp	Elongation At Break	Flexural Modulus	Mixed Viscocity	Mix Ratio By Volume	Mix Ratio By Weight	Pot Life	Shore D Hardness	Color	Mixed Viscocity	Cure Time	Pot Life	Flexural Strength	Flexural Modulus	Specific Volume	Specific Gravity	Mix Ratio By Weight	Shrinkage	Mix Ratio By Volume	Tensile Strength	Elongation At Break	Shore D Hardness	Heat Deflection Temp	Compressive Strength	Tensile Modulus	Compressive Modulus	Handling Time	Handling Time	Heat Deflection With Post Cure	Heat Deflection With Post Cure	Shore A Hardness	Die C Tear Strength	Hundred Percent Modulus	Hundred Percent Modulus	Die C Tear Strength	Shore A Hardness
TASK™ 2	60 min.	1.12 g/cc	24.7 cu. in./lb.	6,650 psi	290,000 psi	8,300 psi	78,000 psi	9,500 psi	0.005 in. / in.	134 °F	6 %	288,000 psi	150 cps	1A:1B	115A:100B	7 min.	80	White	150 cps	60 min.	7 min.	9,500 psi	288,000 psi	24.7 cu. in./lb.	1.12 g/cc	115A:100B	0.005 in. / in.	1A:1B	6,650 psi	6 %	80	134 °F	8,300 psi	290,000 psi	78,000 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 3	90 min.	1.12 g/cc	24.7 cu. in./lb.	6,650 psi	290,000 psi	8,300 psi	78,000 psi	9,500 psi	0.0025 in. / in.	134 °F	6 %	288,000 psi	150 cps	1A:1B	115A:100B	20 min.	80	White	150 cps	90 min.	20 min.	9,500 psi	288,000 psi	24.7 cu. in./lb.	1.12 g/cc	115A:100B	0.0025 in. / in.	1A:1B	6,650 psi	6 %	80	134 °F	8,300 psi	290,000 psi	78,000 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 4	16 h.	1.167 g/cc	23.9 cu. in./lb.	6,500 psi	130,000 psi	7,400 psi	75,000 psi	9,000 psi	0.0035 in. / in.	110 °F	4 %	204,000 psi	250 cps	-	100A:100B	20 min.	83	Ivory	250 cps	16 h.	20 min.	9,000 psi	204,000 psi	23.9 cu. in./lb.	1.167 g/cc	100A:100B	0.0035 in. / in.	-	6,500 psi	4 %	83	110 °F	7,400 psi	130,000 psi	75,000 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 5	24 h.	1.1 g/cc	25.2 cu. in./lb.	4,530 psi	200,000 psi	6,700 psi	83,000 psi	6,480 psi	0.007 in. / in.	145 °F	5 %	216,000 psi	600 cps	1A:1B	1A:1B	3 min.	77	Tan	600 cps	24 h.	3 min.	6,480 psi	216,000 psi	25.2 cu. in./lb.	1.1 g/cc	1A:1B	0.007 in. / in.	1A:1B	4,530 psi	5 %	77	145 °F	6,700 psi	200,000 psi	83,000 psi	15 min.	15 min.	-	-	-	-	-	-	-	-
TASK™ 6	24 h.	1.07 g/cc	25.9 cu. in./lb.	5,200 psi	146,000 psi	5,570 psi	65,000 psi	6,200 psi	0.0031 in. / in.	162 °F	4 %	182,500 psi	800 cps	1A:1B	1A:1B	7 min.	75	Tan	800 cps	24 h.	7 min.	6,200 psi	182,500 psi	25.9 cu. in./lb.	1.07 g/cc	1A:1B	0.0031 in. / in.	1A:1B	5,200 psi	4 %	75	162 °F	5,570 psi	146,000 psi	65,000 psi	75 min.	75 min.	-	-	-	-	-	-	-	-
TASK™ 7	10 min.	1.2 g/cc	23.1 cu. in./lb.	3,390 psi	150,700 psi	5,140 psi	57,600 psi	5,450 psi	0.0111 in. / in.	131 °F	15.1 %	148,900 psi	200 cps	1A:1B	104A:100B	2.5 min.	73	Off-White	200 cps	10 min.	2.5 min.	5,450 psi	148,900 psi	23.1 cu. in./lb.	1.2 g/cc	104A:100B	0.0111 in. / in.	1A:1B	3,390 psi	15.1 %	73	131 °F	5,140 psi	150,700 psi	57,600 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 8	15 min.	1.09 g/cc	25.4 cu. in./lb.	5,840 psi	246,000 psi	8,760 psi	77,400 psi	8,280 psi	0.01 in. / in.	194 °F	4 %	271,000 psi	100 cps	1A:1B	120A:100B	2.5 min.	80	Off-White	100 cps	15 min.	2.5 min.	8,280 psi	271,000 psi	25.4 cu. in./lb.	1.09 g/cc	120A:100B	0.01 in. / in.	1A:1B	5,840 psi	4 %	80	194 °F	8,760 psi	246,000 psi	77,400 psi	-	-	263 °F	263 °F	-	-	-	-	-	-
TASK™ 11	16 h.	1.12 g/cc	24.7 cu. in./lb.	2,500 psi	-	-	-	-	0.0024 in. / in.	-	100 %	-	2,000 cps	-	100A:100B	20 min.	60	Translucent White	2,000 cps	16 h.	20 min.	-	-	24.7 cu. in./lb.	1.12 g/cc	100A:100B	0.0024 in. / in.	-	2,500 psi	100 %	60	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TASK™ 12	16 h.	1.08 g/cc	26 cu. in./lb.	2,700 psi	-	-	-	-	0.001 in. / in.	-	300 %	-	2,400 cps	-	100A:44B	20 min.	60	Clear Amber	2,400 cps	16 h.	20 min.	-	-	26 cu. in./lb.	1.08 g/cc	100A:44B	0.001 in. / in.	-	2,700 psi	300 %	60	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TASK™ 13	20 min.	1.15 g/cc	24.1 cu. in./lb.	1,800 psi	-	-	-	-	0.005 in. / in.	-	125 %	-	800 cps	-	100A:120B	3 min.	50	Black	800 cps	20 min.	3 min.	-	-	24.1 cu. in./lb.	1.15 g/cc	100A:120B	0.005 in. / in.	-	1,800 psi	125 %	50	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TASK™ 14	45 min.	1.15 g/cc	24.1 cu. in./lb.	1,800 psi	-	-	-	-	0.0035 in. / in.	-	125 %	-	800 cps	-	100A:120B	10 min.	50	Black	800 cps	45 min.	10 min.	-	-	24.1 cu. in./lb.	1.15 g/cc	100A:120B	0.0035 in. / in.	-	1,800 psi	125 %	50	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TASK™ 15	1 h.	1.12 g/cc	24.7 cu. in./lb.	2,720 psi	126,000 psi	5,450 psi	60,000 psi	5,450 psi	0.0042 in. / in.	117 °F	20 %	170,000 psi	600 cps	-	75A:100B	6 min.	75	Opaque White	600 cps	1 h.	6 min.	5,450 psi	170,000 psi	24.7 cu. in./lb.	1.12 g/cc	75A:100B	0.0042 in. / in.	-	2,720 psi	20 %	75	117 °F	5,450 psi	126,000 psi	60,000 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 16	24 h.	1.08 g/cc	25.64 cu. in./lb.	2,264 psi	-	-	-	-	0.0025 in. / in.	-	233 %	-	1,400 cps	-	1A:2B	6 min.	30	Light Yellow	1,400 cps	24 h.	6 min.	-	-	25.64 cu. in./lb.	1.08 g/cc	1A:2B	0.0025 in. / in.	-	2,264 psi	233 %	30	-	-	-	-	90 min.	90 min.	-	-	80	197 pli	855 psi	855 psi	197 pli	80
TASK™ 18	16 h.	1.57 g/cc	17.6 cu. in./lb.	3,250 psi	514,000 psi	8,420 psi	97,300 psi	10,700 psi	0.0006 in. / in.	149 °F	1 %	86,000 psi	4,400 cps	-	26A:100B	20 min.	88	Metal Gray	4,400 cps	16 h.	20 min.	10,700 psi	86,000 psi	17.6 cu. in./lb.	1.57 g/cc	26A:100B	0.0006 in. / in.	-	3,250 psi	1 %	88	149 °F	8,420 psi	514,000 psi	97,300 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 21	1 h.	1.07 g/cc	25.9 cu. in./lb.	5,500 psi	270,000 psi	7,100 psi	78,500 psi	7,100 psi	0.0058 in. / in.	144 °F	7.5 %	250,000 psi	500 cps	2A:1B	2A:1B	6 min.	75	White	500 cps	1 h.	6 min.	7,100 psi	250,000 psi	25.9 cu. in./lb.	1.07 g/cc	2A:1B	0.0058 in. / in.	2A:1B	5,500 psi	7.5 %	75	144 °F	7,100 psi	270,000 psi	78,500 psi	-	-	-	-	-	-	-	-	-	-

Danger