(b)  
Storage life of MIL-C-27725 corrosion preventive coatings. 1) Storage life of DeSoto 823-011 or 823-730 is 12 months at 50 to 90°F (10.0 to 32.2°C) from date of manufacture.

2)  Storage life of Products Research Co. PR-1560M, PR-1560MC, PR-1560MK is 6 months at 50 to 90°F (10.0 to 32.2°C) from date of manufacture.
Aug 01/94 28-11-0 Page 812A/812B BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

(8)  Mixing corrosion resistant finish compounds
WARNING:  SOME OF THE MATERIALS USED IN MIXING BMS 10-20 TYPE II OR MIL-C-27725 FINISH COMPOUNDS ARE TOXIC, FLAMMABLE, AND OTHERWISE HAZARDOUS. ALL MIXING MUST BE DONE IN VENTILATED AREAS BY QUALIFIED PERSONNEL WEARING RESPIRATORS. PERSONS NOT WEARING RESPIRATORS MUST LEAVE THE AREA.
(a)  
Conditions unmixed materials to 60 to 90°F (15.6 to 32.2°C) prior to mixing.

(b)  
Measure out proportionate volumes of base and catalyst, plus reducer or thinner if spray application is desired, as specified (Fig. 805).

(c)  
Agitate base component for 10 minutes in Red Devil multi-directional shaker.

(d)  
Mix base and catalyst, plus reducer as needed. Allow 1 hour induction time prior to application. Maximum pot life is 8 hours at 75 +5°F (23.9 +2.8°C).

(e)  
Immediately after mixing, mark container with date and hour of mixing and date and hour pot life expires.

MANUFACTURER  COMPONENT  METHOD OF APPLICATION 
SPRAY  BRUSH 
MFGR. DESIGNATION  PARTS BY VOLUME  VISCOCITY ZAHN NO.1 77+ 2°F  MFGR. DESIGNATION  PARTS BY VOLUME 
Bostik-Finch (BMS  Base  454-4-1  3  454-4-1  3 
10-20 Type II)  Catalyst  CA-109  1  31 - 40 sec.  CA-109  1 
Reducer  TL-52  approx. 1 
DeSoto  Base  823-011  4  823-011  4 
(MIL-C-27725)  Activator  910-099  1  31 - 40 sec.  910-099  1 
Reducer  020-037  approx.4  020-037  0 - 4 
Base  823-730  1  823-730  4 
Activator  910-702  1  31 - 40 sec.  910-702  1 
Reducer  020-707  approx.4  020-707  0 - 4 
Products Research   --- Part A  1  Part A  1 
(MIL-C-27725)  --- Part B  2  31 - 40 sec.  Part B  2 

502  Corrosion Resistant Finish Mixing Proportions 
Nov 15/77  Figure 805  28-11-0 
Page 813 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

NOTE:  Keep containers of mixed corrosion resistant finish compound tightly closed, while waiting for application, or contents will gradually thicken and gel.
(9)  Curing corrosion resistant finish compound
(a)  Cure all finish coatings per Fig. 806.
CORROSION  CURE TIME PRIOR  CURE TIME PRIOR  CURE TIME PRIOR  CURE TIME PRIOR 
RESISTANT FINISH  TO FUEL  TO TRAFFIC  TO ASSEMBLY  TO SEALING 
(BY MFGR.)  EXPOSURE *[1]  *[1]  *[2] 
Bostik-Finch  12 hours at  12 hours at  12 hours at  Fig 807 
(BMS 10-20  65°F or above  65°F or above  65°F or above  *[3] 
Type II)  or Fig. 807  or Fig. 807  or Fig. 807 
*[3] Fig. 808 *[3]  *[3] 24 hours at  *[3] Fig. 809 or  Not
DeSoto 
(MIL-C-27725  65°F or above  240 hours at  Applicable 
65°F or above 
Fig. 810  24 hours at  *[3] 240 hours at  Not
Products 
Research  65°F or above  75°F and mini- Applicable 
(MIL-C-27725)  mum of 30 per-
cent relative 
humidity 

*[1] Verify cure completion by performing fuel resistance check (Ref par. 4.D. (9)(c)).
*[2] Verify cure completion by performing MEK resistance check (Ref par. 4.D. (9)(c)).
*[3] Allow at least 30 minutes drying at application temperature prior to curing at higher temperatures.

Corrosion Resistant Finish Compound Cure Time  502 
28-11-0  Figure 806  Nov 15/77 
Page 814 

BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

(b)  
Cure time can be shortened by using elevated temperatures and, with some finish compounds, by increasing relative humidity (R.H.) (Fig. 807 thru 810).
　
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