PPG SEMKIT Operating and maintenance manual

1. Wear safety glasses, gloves and
other appropriate protection during
all operations. Review the relevant
Technical Data Sheet (TDS) and
Safety Data Sheet (SDS) before using
any chemicals. Contact your site
Health and Safety supervisor for more
details on appropriate PPE and safety
precautions.
2. For optimum mixing properties and
ease of mixing, the kit should be condi-
tioned at 70 °F ± 5 °F (21 °C ± 3 °C) prior to
mixing and use. When not in use, the kit
should be stored as directed on the prod-
uct label or relevant material specification
to ensure retention of properties and
maintain the product certification. Store
the kit in the upright position to minimize
the potential for leakage. Do not open
or puncture the outer Mylar®bag until
the cartridge is ready to be mixed. The
outer Mylar®bag is purged with an
inert atmosphere which preserves the
cartridge during storage.
3. Inspect the label on the bag and
verify that the shelf life is within the listed
expiration date. Verify that the sealant is
the correct product for your application.
Open the outer Mylar®bag and gently
empty the contents of the bag. The bag
may contain a glass vial of adhesion
promoter if required for use with the
sealant; take care not to damage or break
the glass vial.
4. Hold the cartridge firmly in one
hand, with your other hand holding the
dasher rod handle. Pull the dasher rod
forward approximately 1/4 of the way
up the cartridge (away from the plunger
so that the dasher rod is not in contact
with the plunger).
5. Insert the ramrod into the hollow
hole in the handle of the of dasher rod;
push the dasher rod so that it moves
the dasher piston, and inject approxi-
mately 1/3rd of the contents of the dasher
rod (accelerator component) into the
cartridge.
CAUTION: Use firm but even pressure
when pushing the ramrod Do not use
excessive force, tap, pound, or jolt the
ramrod if the piston does not move
readily. The dasher piston may be difficult
to move at first, but will move with
continued even force from the ramrod.
6. Repeat steps 3 and 4, working your
way up the cartridge and advancing
the dasher rod toward the neck end of
the cartridge until all of the contents are
emptied into the cartridge, so that the
accelerator is injected in approximately
1/3rd intervals throughout the cartridge.
Do not inject all of the accelerator at
once or in one area, as this will lead
to a non-uniform mix, and may impact
application and performance properties
of the sealant.
Catalyst in dasher rod with base in cartridge
Step 3
Step 4
Step 5 A
Base
Accelerator
Semkit components
Step 5 B
Injection style PPG SEMKIT®package
Manual use instructions
Step 6 A, B, C

7. To mix, hold the cartridge and push
the dasher rod to the bottom of cartridge
against the plunger. Do not force the
dasher rod against the plunger, as this
may expel the plunger, or cause air en-
trapment in the cartridge. Begin stroking
the dasher rod in a spiral clockwise
motion from the plunger end of the
cartridge to the neck end of the cartridge.
Rotate the dasher rod approximately 90°
with each push or pull of the dasher.
A stroke is one complete in and out cycle,
with approximately 180° clockwise turn
of the dasher. For the first 3 to 5 strokes,
keeping the ramrod inserted into the
dasher rod may prevent material from
flowing back into the dasher rod during
mixing. Mix for the total number of
strokes or time indicated on the instruc-
tion card accompanying each Semkit
package or as noted on the product label.
On the last stroke the dasher rod should
be pushed to the plunger end of the
cartridge, taking care not the push the
plunger.
8. Grasp the cartridge firmly at the
plunger end and detach dasher rod from
the mixing dasher by turning the dasher
rod counterclockwise approximately
three turns. Pull and remove the dasher
rod from the cartridge.
IMPORTANT: Inspect the dasher
rod to ensure that all of the accelerator
component has been injected into the
cartridge. There should be no accelerator
component left in the dasher rod. A small
amount of residue around the walls or
piston is acceptable. Do not discard the
dasher rod until verification of mix has
been performed in step 12.
9. Thread a Semco specialty nozzle into
the neck end of the cartridge as required
for the application being performed. For
more information regarding nozzles and
other dispensing equipment, please
contact your local PPG sales representa-
tive or aerospace ASC location.
10. Remove bottom flange cap.
Catalyst in dasher rod with base in cartridge
Injection style PPG Semkit®package
Manual use instructions (continued)
Step 7
Step 8 A
Step 8 B
Good
Bad
Step 9 A
Step 9 B
Step 10 A
Step 10 B
Step 11 A
Step 11 B
Step 11 C
Step 8 Good
Step 8 Bad

11. Insert the cartridge into a Semco
dispensing gun. Please refer to the
relevant Semco dispensing gun
Technical Data Sheet for proper
assembly and operation of the gun.
12. Dispense a small amount of the
sealant onto a clean cloth, sheet of white
paper, or onto the surface of the Mylar®
bag for inspection. Inspect that the
sealant is homogeneous and free of skins
or lumps. Correctly mixed sealant will be
free of any striations or color marbling.
If color banding or marbling are present,
the sealant may need additional mixing.
If necessary, insert the dasher rod and
install it into the dasher element with 3
clockwise rotations. Continue mixing as
listed in step 7 until no more banding or
striations are observed.
13. Apply the sealant as required by the
relevant process specification or work
instructions.
14. When finished using the sealant,
(i.e.: the cartridge is empty, or the sealant
has reached the end of its rated applica-
tion life), dispose of the Semkit package,
dasher rod and nozzle properly in
accordance with local and site hazardous
material requirements.
Mylar brand is a registered trademark owned by Dupont Tejjin Films
All recommendations, statements, and technical data contained herein are based on tests we believe to be reliable and
correct, but accuracy and completeness of said tests are not guaranteed and are not to be construed as a warranty, either
expressed or implied. User shall rely on his own information and tests to determine suitability of the product for the intended
use and assumes all risks and liability resulting from his use of the product. Seller’s and manufacturer’s sole responsibility
shall be to replace that portion of the product of this manufacturer which proves to be defective. Neither seller nor manufac-
turer shall be liable to the buyer or any third person for any injury, loss, or damage directly or indirectly resulting from use of, or
inability to use, the product. Recommendations or statements other than those contained in a written agreement signed by an
officer of the manufacturer shall not be binding upon the manufacturer or seller.
Semkit is a trademarks of PRC-DeSoto International, Inc.
PRC-DeSoto International, Inc.
12780 San Fernando Road
Sylmar, CA 91342
USA
Telephone [phone]
Toll Free (800) AEROMIX
Fax [phone]
www.ppgaerospace.com
Issued: 10/19
Supersedes: New
LIT# 4713
Catalyst in dasher rod with base in cartridge
Injection style PPG Semkit®package
Manual use instructions (continued)
Step 11 D
Step 11 E
Step 12 A
Step 12 Good
Step 12 Bad
Step 14
Good
Bad