SIG KADET LT-40, Instruction Manual, Page: 29 / 49

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Fuel Proofing
Since it’s very difficult to apply iron-on
covering material inside the engine
compartment, this area should be
made fuel proof by painting it with a
fuel-proof hobby paint, before the
covering material is applied. We prefer
to use SIG SUPERCOAT BUTYRATE
DOPE. It’s an excellent fuel proofer,
and it also acts as a glue to improve the adhesion of the edges of the covering
material that overlaps it. Choose a color paint that closely matches the color of
the covering you will be using. Use a small (1/2" wide) brush to apply 2-3 coats of
paint to the engine compartment, letting it dry between coats.
Paint the entire front surface of firewall F1, plus the inside of the engine
compartment "cheeks". Run the paint around the edges onto the outside of the
fuselage sides, far enough that the iron-on covering material will overlap the
painted areas at least 1/8" when it is applied. Also paint the edges of the hatch
area and partway inside the tank compartment with fuel proof paint.
Paint the area of the fuselage where the wing will sit with fuel proof paint.
Paint the bottom of the grooved landing gear block with fuel proof paint.
Covering Cutting Diagram
The diagrams below suggest how to cut 3 standard size rolls (26" x 6 ft.) of iron-on covering material for the KADET LT-40.
We recommend that you take the time to layout each roll on a large, clean surface and cut it to the sizes shown in the
diagram. Use a pen to label each piece along one edge. Save the areas marked "scrap" for use in covering the ends of the
control surfaces. Once you get started covering, save any large "trimmings" for possible use later.
NOTE: If you decide to cover your KADET LT-40 with more than one base color (for example: wings one color, fuselage
another), you will probably need more than 3 rolls of covering material.