KX Flex™ 40

KXFlex40pint ⓘ 6E3BB217-BC35-714E-9CAA-40F4E46E065E
Polyurethane Elastomer
Size
0.91 kg

Shore A40 urethane mold rubber, suitable for repeated casting, balancing elasticity and strength, facilitating easy demolding while retaining shape and surface detail

  • mix ratio:  1A:1B by volume
  • working time:  25 min
  • cure time:  16 hr
  • Reproduces fine details
  • Supports multiple cycles
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Danger

H317 - May cause an allergic skin reaction.
H332 - Harmful if inhaled.
H334 - May cause allergy or asthma symptoms or breathing difficulties if inhaled.
H335 - May cause respiratory irritation.
€ 38.24

(€ 31.60 without 21% VAT)

In stock

Description

This urethane mold rubber is designed for creating flexible and durable molds suitable for repeated casting. 

With a Shore A40 hardness, KX Flex™ 40 balances elasticity and strength, facilitating easy demolding while retaining shape and surface detail. 

This makes it suitable for both simple and moderately complex mold geometries.

Features

  • 1A:1B mix ratio by volume for accurate measurement and consistent results
  • Approximately 25 minutes of working time for thorough mixing and careful pouring
  • Cures in about 16 hours at room temperature, achieving full mechanical properties
  • Commonly used for molds intended for plaster, gypsum, concrete, and various resin systems
  • Flexibility allows for easy release of cast parts
  • Durability supports multiple production cycles without rapid wear
  • Reproduces fine surface details and maintains clean edges over repeated use
  • Can be poured as a solid mold or thickened for brush-on applications
  • Compatible with standard mold release agents and can be pigmented for easy identification

Instructions

Mix at a 1A:1B ratio by volume until uniform. Pour onto clean, prepared surfaces or molds.

Steps

  • Working time is approximately 25 minutes.
  • Degas if needed, then pour slowly to reduce bubbles.
  • Do not disturb during cure.
  • Allow approximately 16 hours to fully cure at room temperature.
  • Use mold release if required.
  • Once cured, the mold is ready for casting.

Safety

  • Wear gloves and ensure proper ventilation.

Specifications

Color Translucent White
Mixed Viscocity 800 cps
Cure Time 24 hours
Pot Life 2.5 minutes
Specific Volume 25.9 cu. in./lb.
Specific Gravity 1.07 g/cc
Mix Ratio By Weight 1A:1B
Shrinkage 0.002 in. / in.
Mix Ratio By Volume 1A:1B
Tensile Strength 457 psi
Elongation At Break 400 %
Shore A Hardness 40
Handling Time 30 minutes
Available in Polyurethane Elastomer
Product Color Color Mixed Viscocity Cure Time Pot Life Specific Volume Specific Gravity Mix Ratio By Weight Shrinkage Mix Ratio By Volume Tensile Strength Elongation At Break Shore A Hardness Handling Time
KX Flex™ 40 Translucent White Translucent White 800 cps 24 h. 2.5 min. 25.9 cu. in./lb. 1.07 g/cc 1A:1B 0.002 in. / in. 1A:1B 457 psi 400 % 40 30 min.
KX Flex™ 60 Off-White Off-White 800 cps 24 h. 2.5 min. 24.1 cu. in./lb. 1.15 g/cc 100A:94B 0.005 in. / in. 1A:1B 1,800 psi 125 % 60 30 min.
KX Flex™ 90 Off-White Off-White 800 cps 24 h. 2.5 min. 24.1 cu. in./lb. 1.15 g/cc 100A:120B 0.005 in. / in. - 1,800 psi 125 % 90 30 min.
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