Page 642 - Lewis

West System Epoxy 641

Special Clear Hardeners
No. 207 Special Coating Hardener No. 209 Extra-Slow Hardener

FIG 5522b

207 Special Coating Hardener is formulated for use with WEST
SYSTEM Brand 105 Resin in coating applications where an FIG 5523b
extremely clear finish is desired, especially when working in
humid and/or low-temperature conditions. Also provides ade- 209 Extra-Slow Hardener is formulated for use with WEST
quate adhesion for bonding applications. Contains a UV-stabi- SYSTEM Brand 105 Resin in extremely warm and/or humid
lization additive. Increases the longevity of oil and conditions for general bonding and coating applications, pro-
polyurethane varnishes. Provides 20-25 minutes of pot life at viding approximately twice the pot life and working time as
72°F (22°C), and will cure to a solid state in 9 to 12 hours. 206 Slow Hardener. 209 Extra Slow Hardener will provide ade-
Minimum recommended temperature is 60°F (16°C). quate pot life up to 110°F (43° C). May also be used in normal
Maximum strength occurs over the next 4 to 7 days. Use #300 temperatures — 65°F (18°C) to 72°F (22°C) — when additional
pump set to achieve the proper 3 parts 105 Resin to 1 part 207 pot life and assembly time may be desirable. Provides 15 to 20
Hardener mixture. May also be dispensed with 306-3 high minutes of pot life at 95°F (35°C) and 40 to 50 minutes at 72°F
capacity pumps. (22°C). Will cure to a solid state in 6 to 8 hours at 95°F and in
USE WITH SPECIAL RATIO DISPENSING PUMP 20 to 24 hours at 72°F. Maximum strength occurs over the next
No. Each Size Ratio Case 4 to 9 days. Forms a clear, amber-colored solid. The 309-3 dis-
207SA $44.40 .66 pts. 3:1 4 penses up to 5 quarts per minute and its reservoirs hold 2 gal-
207SB 99.80 .33 gal. 3:1 4 lons of resin and 1 gallon of hardener. Not recommended for
207SC 323.00 1.45 gal. 3:1 1 clear coating.
WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov USE WITH SPECIAL RATIO DISPENSING PUMP
No. Each Size Ratio Case
APPROXIMATE POT LIFE 209SA* $41.05 .66 pts. 3:1 4
209SB* 93.20 .33 gal. 3:1 4
TEMPERATURE vs. POT LIFE 209SC* 297.15 1.45 gal. 3:1 1
HUMIDITY = 30% R.H., QUANTITY MIXED = 100G PUMPS WEST SYSTEM EPOXY
No. Each Description Case
Fig. 5502 No. 300 $17.10 Pump Set for A,B,C No.105 Resin 12
309-3 1012.85 Spec. Ratio Gear Pump 1
* WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

ESTIMATING
COATING COVERAGE
WEST SYSTEM 105 RESIN/207 or 209 HARDENER

SATURATION COAT BUILD-UP COATS
QUANTITY
OF MIXED POROUS NON-POROUS
EPOXY SURFACES SURFACES

Group Size A 90 - 105 sq. ft. 120 - 135 sq. ft.
1.3 qt (1.26L). (9 - 10 m 2 ) (11 - 13 m 2 )
Group Size B 370 - 430 sq. ft. 490 - 550 sq. ft.
Comparison of hardener pot life vs. temperature. 1.3 gal. (4.98L) (35 - 40 m 2 ) (45 - 50 m 2 )
100g mixtures with 105 Resin.
Group Size C 1675 - 1955 sq. ft. 2235 - 2520 sq. ft.
HUMIDITY=30% POT LIFE (MINUTES) 5.8 gal. (21.9L) (155 - 180 m 2 ) (207 - 233 m 2 )
MIX QUANTITY=100g
Variations in temperature will affect the pot life of the mixed epoxy. Adding Fillers or wetting out fabrics
Note that the higher the mixture's temperature, the shorter the will decrease coverage
working pot life.