TB 1-1615-351-23
(a) Local greasy spots should be cleaned using denatured or isopropyl alcohol.
(b) Layout and mask the total area of the main rotor blades to be protected with the coating per Figure 3-29.
It is important that all blades in a set be masked the same.
(2) Prepare surface as follows:
(a) Sand the area to be coated to remove bugs, dirt and oxidized coating. As a minimum, scuff the existing
paint over the total area to be protected. Always sand in a spanwise direction.
(b) Dry wipe the blade with a clean cheesecloth or towel to remove the sanding residue. Wipe the blade
several times with cheesecloth dampened with denatured or isopropyl alcohol, then wipe once again with dry cheesecloth.
(c) Inspect the surface for any greasy looking areas. Sand these areas a little more vigorously to take away
the sheen. Wipe the blade again with the cheesecloth. The blade should now be dry and free from sanding residue.
Avoid touching or contaminating the prepared surface after it is wiped.
(d) Remove the old masking tape and replace with new as required to repair tape damaged by sanding.
Mark coming application spanwise dimensions on the tape before starting to apply the coating. Make sure all screw
heads are covered with masking tape. Screw heads must not be coated.
(3) Mix the coating as follows:
(a) The coating consists of individual foil packets, each of which contain Part A of the two-part coating (in a
pull-top can which is about half-filled), Part B (in a syringe with a tip cap) and a stir stick to mix them. Parts A and B are
pre-measured to assure proper cure.
WARNING
The coating will not wash off and can be irritating to the skin. Wear gloves and
safety goggles when mixing and applying this product.
(b) To mix the coating, open Part A. Remove the tip cap from Part B and squirt the full contents into the can
containing Part A. Stir the mixture for a full 60 seconds using the stick provided, being careful to scrape the sides of the
can with the stick occasionally to assure total mixing of both parts. You have only 5-10 minutes to get the coating out of
the can, so don't start mixing until you are ready to start the application. The coating cures faster in the can than it does
on the blade.
3-83
