Flexer™ Epoxy Flexibilizer

*NOTE: Product Packaging May Vary

› Technical Bulletin and SDS

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.

Gallery

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.