Technical Specifications
EPOXY 
TECHNICAL DATA 
RO-139 
HIGH PERFORMANCE 
9100 SYSTEM DTM EPOXY MASTIC 
3 
Form: ARJ-1503 
Rev.: 071320 
PRODUCT APPLICATION (cont.) 
APPLICATION (cont.) 
POOLS: 
When used with Immersion Activator, the DTM Epoxy 
Mastic premix bases can be used as a pool coating over existing 
epoxy pool coatings, new bare concrete, plaster, Gunite, and 
fiberglass. The pool must be completely empty and dry before 
coating. After pool is emptied, this typically requires 7- 10 days 
depending on temperature and humidity. To test the dryness of 
concrete, Gunite or plaster pool surfaces, securely tape a 2 ft. by 
2 ft. piece of clear plastic onto a horizontal and vertical surface at 
the deep end of the pool. Check after 24 hours. If water 
condensation is visible under the plastic, this is an indication that 
the surface is not completely dry, and NOT suitable for coating. 
Allow additional dry time and retest. Follow surface preparation, 
mixing and application instructions. Avoid painting in midday sun. 
Application is recommended early in the day or late in the 
afternoon when at least 2 hours of sunlight remain after 
completion of the job. 
Allow minimum of 5-7 sunny days cure before filling pool. Early 
contact with water can cause premature fading, chalking and 
blistering. Super chlorinated water can cause a bleached-out 
appearance. Sunlight and UV will cause chalking and fading.  
Do not
 use over: 1) chlorinated rubber, 2) synthetic rubber, 3) 
vinyl, 4) acrylic. 
NOTE: In swimming pool service, early chalking may occur if the 
water pH is outside the range of 7.2-7.6 and/or if the water 
temperature exceeds 100°F (38°C). Not recommended for use in hot 
tubs. 
EQUIPMENT RECOMMENDATIONS 
(Comparable equipment also suitable.) 
BRUSH
: Use a good quality natural or synthetic bristle brush. 
ROLLER:
 Use a good quality lamb’s wool or synthetic fiber (3/8- 
1/2"nap). 
AIR–ATOMIZED SPRAY 
Method 
Fluid Tip 
Fluid Delivery 
Atomized 
Pressure 
Pressure 
0.055-0.070 
10-16 oz./min. 
25-60 psi 
Siphon 
0.055-0.070 
-- 
25-60 psi 
HVLP 
0.043-0.070 
8-10 oz./min. 
10 psi (at tip) 
AIRLESS SPRAY 
Fluid Pressure 
Fluid Tip 
Filter Mesh 
1,800-3,000 psi 
0.013-0.017 
100 
THINNING 
Thinning is normally not required, except for air-atomized spray. 
For air-atomized spray application, thin only up to 10% by volume 
with 160402 Thinner after the components have been mixed. If 
the coating is going to be used in immersion service, 9102 or 
9104 activator, then, use up to 10% 165402 Thinner for air-
atomized spray and up to 5% of 165402 Thinner for airless spray. 
NOTE: Addition of more than 10% of 160402 or 165402 Thinner 
will cause VOC to exceed 340 g/l. In this case, 333402 VOC 
exempt thinner can be used if needed. 
NOTE: 
When using the Satin Activator, thin only with 333402 
Thinner to maintain the VOC <250 g/l. 
PRODUCT APPLICATION (cont) 
MIXING 
Both the base and activator components are highly 
pigmented. Mix each component thoroughly to ensure any 
settled pigment is re-dispersed before combining the 
components together. Combine at a 1:1 ratio by volume in a 
container large enough to hold the total volume. Mix 
thoroughly for 2-3 minutes. Power mixing is preferred. Do not 
mix more material than you plan to use within the listed pot 
life. 
CLEAN-UP 
Use 160402 or 165402 Thinner. 
SHELF LIFE 
Base components 3 years
6
 Activators 2 years
6
6
 Unopened containers. Some settling may occur requiring mechanical mixing 
to redisperse pigment. 
PERFORMANCE CHARACTERISTICS 
SYSTEM TESTED 
DTM EPOXY MASTIC WITH 9101 Activator 
PENCIL HARDNESS 
METHOD: ASTM D3363 
RESULT: B (7 days), 4H (30 days) 
CONICAL FLEXIBILITY 
METHOD: ASTM D522 
RESULT: >32% 
CYCLIC PROHESION 
Rating 1-10, 10=best 
METHOD: ASTM D5894, 2300 hours 
RESULT: 10 ASTM D714 for blistering 
RESULT: 10 ASTM D1654 for corrosion 
IMPACT RESISTANCE (direct) 
METHOD: ASTM D2794 
RESULT:160 in. lbs. 
ALKALI RESISTANCE 
METHOD: ASTM D1308 
RESULT: No effect 
TABER ABRASION 
METHOD: ASTM D4060, CS-17 wheels, 500 gram load, 1000 cycles 
RESULT: 125 mg loss 
GLOSS 
METHOD: ASTM D4587 
RESULT: 80% 
CAUTION: Exposure of the 9100 System during the curing stage of 
the coating to the by-products of propane combustion may cause 
discoloration to occur. During application and curing, propane fueled 
fork-lifts and other vehicles or propane fueled heaters should not be 
used in the area until the coating is fully cured. At least 72 hours. 





