Fracture And Puncture Repairs - Columbia Coronado 25 Owenrs Manual

6.3

FRACTURE AND PUNCTURE REPAIRS

6.3.1 Basic Procedures for Repairing
Fractures and Punctures
The purpose of this chapter is to give you the basic procedures for
repairing fractures and punctures (holes) in the fiber glass (that is,
below the gel-coat surface) of a fiber glass product or part. Sections
6.3.2 thru 6.3.7 give specific variations in the basic procedures according
to the type of fracture or hole.
IMPORTANT
To determine how to repair a fracture or puncture, refer first to the
appropriate section.
Fractures are classified as (1) simple fractures, which do not penetrate
the fiber glass structure and (2) compound fractures which do penetrate
the structure but which can be reached from both outside and inside the
structure (Section 6.3.3) or only from the outside (Section 6.3.4).
Punctures are classified as (1) holes that can be reached from both
inside and outside the structure (6.3.5) or only from the outside of the
structure (6.3.6) and (2) holes that are larger than 1/4 inch (6.3.7).
TOOLS
Power sander
24 grit sanding disc
Sanding block
Rubber squeegee
Putty knife
Scissors
Stirring stick
Paintbrush
White cloth
Cellophane
Wire
Stick
B. Removing Damaged Fiber Glass
1. Remove the damaged fiber glass from the fractured area or
puncture with a power sander and 24 grit sanding disc. To
restore the strength to the damaged area you must sand outward
(on all sides) from the fracture or puncture at least 2". This
technique allows the subsequent fiber glass patch to bond to
structurally sound material. Also, be sure to cup out the
sanded area smoothly so as to achieve a smooth, even buildup.
MATERIALS
Fiber glass mat
Fiber glass cloth
Resin
Catalyst
Sandpaper 50 & 100 grit
Gel coat
Cab-o-sil collodial silica
Cardboard '
Acetone
Woven roving
Masking tape
Milled fibers
SECTION 6
Page 16