His Glassworks, Inc.
91 Webb Cove Road
Asheville, NC 28804 USA
INSTRUCTIONS AND TECHNICAL DATA SHEET
FLEX-TEC is an optically clear, low viscosity, shatter resistant elastomeric polyurethane coating developed for coating glass components to
prevent shattering. Recommended for sealing glass surfaces that may shatter upon damage and thereby maintaining the physical integrity
of glass components should the glass itself break. This two-part coating material is easily mixed and cured at room temperatures and
develops strong, tough bonds to glass and ceramics. FLEX-TEC also offers marginal resistance to impact as the coating forms a thin, yet
flexible and resilient coating.
Before proceeding with FLEX-TEC usage, you should read and understand the following information to ensure the correct application of
Preparation and mixture of FLEX-TEC:
FLEX-TEC Preparation: Both parts of FLEX-TEC must be water clear and not cloudy. Part B, if stored or transported in
temperatures below 65 degrees F (18ºC), may become cloudy. Simply warm Part B to about 90 degrees F (32ºC) to clarify.
Shake or stir Part B thoroughly before use as the components of Part B will separate if allowed to sit.
Mixture: The correct mix ratio for FLEX-TEC is 1 part of A to 1 part of B by weight. Mix throughly. FLEX-TEC is a 100%
solid and cures by chemical reaction, not by air drying. Do not attempt to thin FLEX-TEC as this will cause adverse reactions to
Vacuum degassing: This is possible with FLEX-TEC if bubble free coatings are required. Two to three minutes of vacuum is
FLEX-TEC UV STABILIZED ANTI-SHATTER
Flex-Tec is available in 1/2 pound sample kits,
2 pound, 4 pound and 16 pound kits.
Coverage is roughly 18 square feet per pound
with a single coat.
Flex-tec should be weighed out 1:1 in order to
achieve an adequate coating for your glass. We
have larger pound scales available that make
this process very simple.
Application of FLEX-TEC:
Glass substrate preparation: Clean the glass throughly with alcohol or acetone. Surfaces should be clean, dry and free of all oils,
grease or any other physical contaminants. Contaminants on the glass will prevent proper adhesion. Do not use commercial glass
cleaners as they often contain surfactants, which may interfere with adhesion.
Application: FLEX-TEC may be applied to surfaces by pouring, brushing, rolling, or dipping. As this material has a low viscosity,
it may be advisable to apply one or more over coats during the Over coat period (see below), followed by the recommended
Curing procedure (see below). FLEX-TEC is best applied at room temperature (70–75 degrees F, 21–24ºC). Do not attempt
application beyond the FLEX-TEC pot life time (see below).
Over coat: Between 2–4 hours. Two coats of FLEX-TEC are generally recommended for maximum performance.
Curing: After final application the FLEX-TEC should remain undisturbed for 6 hours (see below for Pre-Cure). Following the
Pre-Cure, there can be a Post-Cure cycle of heat at 150 degrees F +/-10 degrees (66ºC) for a period of 6–8 hours. Full cure can
also occur at room temperature with an additional 3–4 day cycle after the Pre-Cure step. The surface may remain slightly tacky
until it is fully cured.
Ventilation: Provide general or local exhaust. Local exhaust ventilation is preferred because it prevents contaminant dispersion
into the work area by controlling it at its source.
Protective Clothing/Equipment: Wear chemically protective gloves, boots and aprons to prevent prolonged or repeated skin
contact. Wear protective eyeglasses, chemical safety goggles or face protection. Contact lenses are not protective devices.
Appropriate eye protection must be worn instead of, or in conjunction with contact lenses.
Handling Precautions: Minimize breathing of vapors and avoid prolonged or repeated contact with skin. Wear proper protective
equipment. If ventilation is not sufficient, wear proper respiratory equipment. Avoid moisture contamination. Be sure that partial
containers are well sealed after use.
Clean up: All equipment should be cleaned IMMEDIATELY with acetone or alcohol. Clean up skin contact with soap and plenty
of water. DO NOT clean your hands with acetone.
Storage Requirements: Store in a cool, dry, well ventilated area. Warm both parts prior to use to insure clarity of Part B.
Comments: Never eat, drink or smoke in work areas. Practice good personal hygiene after using this material, especially before eating,
drinking, smoking, using the toilet or applying cosmetics.
Material Saftey Data Sheet: MSDS is available online at http://www.hisglassworks.com/files/Flex-Tec_MSDS.pdf
Packaging: Available in 1/2 pound sample kits, 2 pound, 4 pound and 16 pound kits.
POT LIFE (WORK TIME)
POT LIFE (WORK TIME)- EXTENDED TIME FLEX-TEC
GEL TIME BEGINS (VARIES WITH APPLICATION TEMPERATURE)
FULL CURE AT ROOM TEMPERATURE
ACCELERATED FULL CURE
15 MINUTES FROM MIXTURE
1 HOUR FROM MIXTURE
20 MINUTES TO 1 HOUR@ 75ºF (25ºC)
6 HOURS @ 75ºF (25ºC) MINIMUM
4 DAYS @ 75ºF (25ºC) MINIMUM
6–8 HOURS @150ºF (66ºC)
TYPICAL UNCURED PROPERTIES (LIQUID)
VISCOSITY, CPS MIXED (AFTER MIXING@75ºF [25ºC]) 900
CLEAN UP SOLVENTS
MIX RATIO (PARTS BY WEIGHT) RESIN (A)/ HARDENER (B) 1:1
TYPICAL CURED PROPERTIES (SOLID)
OPERATING TEMPERATURE RANGE
-60º TO 150ºF (-51º TO 66ºC)
HARDNESS, SHORE D 85-90
ELONGATION AT BREAK 180%