Flexer® Epoxy Flexibilizer Pint

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Flexer® Epoxy Flexibilizer

Flexer® Epoxy Flexibilizer

Flexer® Epoxy Flexibilizer is a clear, low viscosity liquid additive that will lower the durometer (Shore hardness) of some Smooth-On casting and laminating epoxies. When added to the epoxy system in the proper proportion, the cured epoxy will be softer and, in some cases, can be made semirigid. Flexer® will lower the viscosity of the epoxy system, improves wetting capability (for laminating) and filler load capacity.

Features

Make Epoxy Semi-rigid - make pieces that are less brittle with increased impact resistance.

Choose Desired Result - Physical and performance properties of cured epoxy system may lower in proportion to the amount of added. Once Flexer® has been added your piece will remain flexible.

Lower Viscosity - will help with de-airing castable resins and will help laminating epoxies wet out through composite reinforcements (fiberglass cloth, Kevlar, etc.) better.

Instructions

PREPARATION
Read and follow directions given on the technical bulletin for the EpoxAcast® or EpoxAmite® product before adding Flexer®.
Store and use all materials at 73°F / 23°C. Avoid breathing fumes - use in a well ventilated area at minimum. NIOSH approved respirator is recommended. Wear safety glasses, long sleeves and rubber gloves to minimize skin contact.


MEASURING AND MIXING
Flexer® Epoxy Flexibilizer is added by weight as a percentage of Part A. An accurate gram scale is required. Add Flexibilizer to Part A of the epoxy system and mix thoroughly. Add the appropriate amount of Part B and mix all components thoroughly.

Example:
Goal – Soften EpoxAcast 650 from a Shore 90D to a Shore 60D. Normal mix ratio: 100A:12B

EpoxAcast® 650
Part A
+ Flexer®
Flexibilizer
Mix
Thoroughly
+ EpoxAcast® 650
Part B
Mix
Thoroughly
Pour &
Let Cure
1,000 grams   150 grams     120 grams    

Important: Working time and cure time will be increased in proportion to the amount of Flexibilizer added. Physical and performance properties (including Shore hardness) of cured epoxy system may be lower in proportion to the amount of Flexer® added. Do not exceed recommended loading maximum of 20% of epoxy Part A, as the epoxy system may not cure.

Epoxy % of Flexer® Added
To Part A
Pot Life (Minutes) Shore D Hardness
After 48 Hours
Shore D Hardness
After 7 Days
EpoxAmite® 100
101 Hardener
0 % 11 82 84
5 % 18 80 80
10 % 25 77 77
15 % 30 75 75
20 % 40 70 70
EpoxAmite® 100
102 Hardener
0 % 22 80 80
5 % 60 78 78
10 % 120 76 76
15% 135 72 73
20 % 150 65 70
EpoxAcast® 650
101 Hardener
0 % 20 90 95
5 % 60 90 90
10 % 180 85 85
15 % 210 75 77
20 % 270 70 70
EpoxAcast® 655
101 Hardener
0 % 30 90 90
5 % 60 85 85
10 % 120 83 83
15 % 150 70 70
20 % 300 60 65
EpoxAcast® 690 0 % 300 75 80
5 % 420 65 75
10 % 570 50 65
15 % * 720 40 55
20 % * 1260 25 35
*Cured EpoxAcast® 690 will remain tacky (sticky to the touch) for 48 hours or more depending on casting mass and thickness.

Because no two applications are quite the same, a small test application to determine suitability is recommended if performance of this material is in question.

 
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