TO 1-1-700 - Robins Air Force Base
TO 1-1-700 - Robins Air Force Base
TO 1-1-700 - Robins Air Force Base
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<strong>TO</strong> 1-1-<strong>700</strong><br />
d. Remove all uncured sealant residue by wiping the area<br />
with an SAE AMS 3819A, Class 2, Grade A or equivalent<br />
cleaning cloth wetted with a liquid product known<br />
as Sky Wash® distributed by AeroSafe Products Inc.<br />
and wiping dry with a clean, dry cloth of the same type.<br />
12.6.6 Peel and Stick Application; AMS 3255 EPTFE<br />
Skyflex® and Av-DEC® HT3935-7 and HT3000 Sealing<br />
Tapes. Prior to application, prepare surface in accordance<br />
with paragraph 12.6.1.<br />
NOTE<br />
• MEK conforming to ASTM D740 may be used as<br />
an alternate solvent for cleaning up uncured sealant<br />
residues as long as it is not environmentally<br />
prohibited and the equipment SPM approves its<br />
use and requires it in system specific technical data.<br />
• See Appendixes A and B in <strong>TO</strong> 1-1-691 for procurement<br />
information on materials used for cleaning<br />
and masking.<br />
12.6.5 Spray Gun Application. Prior to masking and sealing,<br />
prepare surface in accordance with paragraph 12.6.1.<br />
If any dirt or oil residues accumulate after conversion<br />
coating, clean thoroughly with solvent to ensure adequate<br />
adhesion of paint, primer, and sealant.<br />
a. Mask off adjacent areas with either MIL-PRF-121, Type<br />
I or II or MIL-PRF-131, Class 1 barrier material held in<br />
place with AMS T-21595, Type I masking tape to minimize<br />
overspray on adjacent areas.<br />
After surface treatment and any required primer application,<br />
do not contaminate areas to be sealed with<br />
soiled hands or tools as contamination prevents proper<br />
sealing tape adhesion.<br />
a. Examine faying surfaces to be sealed and build up any<br />
uneven areas on the equipment frame flange. Use Skyflex®<br />
part No. GUA-1003-1 compensation tape or a<br />
small piece of the same type of Skyflex® tape that will<br />
be used for AMS 3255 sealing tape applications and a<br />
small piece of the same type of Av-DEC tape that will<br />
be used for HT3935-7 and/or HT3000 sealing tape<br />
applications. This will create a level faying surface for<br />
panel sealing.<br />
b. Select the proper part No. sealant tape so that it will<br />
cover the full width of the faying surface to be sealed.<br />
Tape may be applied to either the equipment frame<br />
flange or to the panel faying surface.<br />
c. Measure and cut the required length of sealant tape.<br />
d. For corners, cut the ends of the tape at a 30 degree angle<br />
so that the sealant tape from the converging side will<br />
overlap by one-quarter to one-half inch. Do not fold the<br />
tape in corners as this will result in triple layer thickness.<br />
MIL-PRF-81733, SEALING AND COATING COMPOUND,<br />
CORROSION INHIBITIVE 48<br />
b. Apply MIL-PRF-81733, Type III sprayable sealant in a<br />
solid, continuous pattern per the manufacturer's instructions<br />
and <strong>TO</strong> 1-1-8.<br />
NOTE<br />
The Dry Film Thickness (DFT) of spray sealant coatings<br />
shall be in the range of 3 to 5 mils (0.003 inch to<br />
0.005 inch).<br />
Use care not to pull or stretch the sealant tape as it is<br />
applied. The stretched AMS 3255 EPTFE and Av-<br />
DEC® HT3000 tapes will retract even if clamped<br />
between faying surfaces, and the Av-Dec® HT3935-<br />
7 tapes will be reduced in thickness. In either case,<br />
inadequate sealing may result.<br />
e. Peel the non-stick backing paper off the sealant tape a<br />
little at a time as the tape is applied to the equipment<br />
frame flange or mating panel surface.<br />
12-28