Technical Specifications
EPOXY 
TECHNICAL DATA 
RO-139 
HIGH PERFORMANCE 
9100 SYSTEM DTM EPOXY MASTIC 
4 
Form: ARJ-1503 
Rev.: 071320 
PHYSICAL PROPERTIES 
9101 
Activator 
9102 
Immersion Act. 
9103 
Low Temp. Act. 
9104 
Fast-Cure Act. 
Resin Type 
Aliphatic Amine 
Converted Epoxy 
Polyamide 
Converted Epoxy 
Aliphatic Amine 
Converted Epoxy 
Polyamide/modified Amine 
Converted Epoxy 
Inhibitive Pigment 
Calcium Borosilicate 
Calcium Borosilicate 
Calcium Borosilicate 
Calcium Borosilicate 
Solvents 
Xylene, Methyl 
Isobutyl Ketone, 
1-Methoxy-2-propranol 
Xylene, Methyl 
Isobutyl Ketone, 
1-Methoxy-2-propranol 
Xylene, Methyl 
Isobutyl Ketone, 
1-Methoxy-2-propranol 
Xylene, Methyl 
Isobutyl Ketone, 
1-Methoxy-2-propranol 
Weight
7
Per Gallon 
11.4-12.6 lbs. 
11.4-12.6 lbs. 
9.3-10.4 lbs. 
12.0-13.0 lbs.
Per Liter 
1.4-1.5 kg 
1.4-1.5 kg 
1.1-1.2 kg 
1.4-1.6 kg 
Solids
7
By Weight 
86-89% 
79-82% 
78-81% 
81-83% 
By Volume 
78-81% 
65-68% 
72-75% 
67-69% 
Volatile Organic 
Compounds
7
<340 g/l (2.84 lbs./gal.) 
<340 g/l (2.84 lbs./gal.) 
<250 g/l (2.08 lbs./gal.) 
<340 g/l (2.84 lbs./gal.) 
Mixing Ratio 
1:1 Base:Act.(by vol.) 
1:1 Base:Act.(by vol.) 
1:1 Base:Act.(by vol.) 
1:1 Base:Act.(by vol.) 
Recommended Dry Film 
Thickness (DFT) Per Coat 
5-8 mils (125-200µ) 
5-8 mils (125-200µ) 
5-8 mils (125-200µ) 
5-8 mils (125-200µ) 
Wet Film to Achieve DFT 
(unthinned material) 
6.5-10.5 mils 
(162.5-262.5µ) 
7.5-12.0 mils 
(187.5-300µ) 
7.0-11.0 mils 
(175-275µ) 
7.5-12.0 mils 
(187.5-300.0µ) 
Theoretical Coverage at 
1 mil DFT (25µ) 
1,250-1,300 sq.ft./gal. 
(30.8-32.0 m
2
/l) 
1,045-1,090 sq.ft./gal. 
(25.7-26.8 m
2
/l) 
1,155-1,200 sq.ft./gal. 
(28.4-29.5 m
2
/l) 
1,075-1,100 sq.ft./gal. 
(26.4-27.3 m
2
/l) 
Practical Coverage at 
Recommended DFT 
 (assumes 15% material loss) 
125-225 sq.ft./gal. 
(3.1-5.5 m
2
/l) 
100-175 sq.ft./gal. 
(2.5-4.3 m
2
/l) 
125-200 sq.ft./gal. 
(3.1-5.0 m
2
/l) 
115-190 sq.ft./gal. 
(2.8-4.7 m
2
/l) 
Induction Period 
None required 
30 minutes 
(60 min. < 65°F) 
None required 
15 minutes 
Pot Life
8
2 gallons 
2-4 hours at 
70°F (21°C), 
1-2 hours at 
90°F (32°C) 
2-4 hours at 
70°F (21°C) 
3-5 hours at 
60°F (15°C) 
2-4 hours at 60°F (15°C) 
2-4 hours at 
70°F (21°C) 
1-2 hours at 
90°F (32°C) 
10 gallons 
2 hours at 
70°F (21°C) 
<1 hour at 
90°F (32°C) 
2 hours at 
70°F (21°C) 
3 hours at 
60°F (15°C) 
2 hours at 60°F (15°C) 
2 hours at 
70°F (21°C) 
<1 hour at 
90°F (32°C) 
Dry Times at 
50% Relative 
Humidity 
Tack-free 
6-8 hours at 
70°F (21°C) 
12-24 hours 
at 
50°F (10°C) 
6-8 hours at 70°F (21°C) 
16-20 hours at 40°F (5°C) 
4 hours at 
70°F (21°C) 
8 hours at 
50°F (10°C) 
Handle 
6-12 hours at 
70°F (21°C) 
48-72 hours 
at 
50°F (10°C) 
8-14 hours at 70°F (21°C) 
22-26 hours at 40°F (5°C) 
5 hours at 
70°F (21°C) 
10 hours at 
50°F (10°C) 
Recoat 
16 hours to 
1 year
9 
70°F (21°C) 
72 hours to 
1 year
9 
50°F (10°C) 
16 hours to 
1 year
9 
70°F (21°C) 
24 hours to 1 year
9
4 hours to 1 year
9 
70°F (21°C)
8 hours to 1 
year
9 
50°F (10°C) 
Dry Heat Resistance 
300°F (149°C), 
Color may shift above 150°F 
(66°C) 
300°F (149°C), 
Color may shift above 150°F 
(66°C) 
300°F (149°C), 
Color may shift above 150°F 
(66°C) 
300°F (149°C), 
Color may shift above 150°F (66°C) 
Maximum Immersion 
Temperature 
NA 
120°F (49°C) 
NA 
NA 
Shelf Life 
Unopened containers; 3 years Base components, 2 years Activator components 
Safety Information 
See SDS 
7 
Activated material. 
8 
Pot life is affected by air temperature, amount of material activated and quantity of thinner used. Avoid activating large quantities at temperatures above 80°F (27°C). At 
temperatures above 90°F (32°C), the pot life of unthinned material in 5 gallon pails may be very short (less than one hour). Final gloss maybe slightly higher for coating 
applied near the end of the pot life. 
9 
If recoat time is extended, be sure the surface is clean and free of all contamination prior to coating. Actual environmental conditions may affect results, so a trial 
is suggested to ensure acceptable results 





