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Once the modifications are complete, the screws are tightened onto the rail, the thread is trimmed to the nut and the nut itself is notched to for a better grip in the epoxy. A stronger solution still is to put a stainless washer under the nut. Roughen the bonded side of the washer with coarse sandpaper, grinder of a file so that the washer can also bond with the epoxy. |
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The next vital step is to create a nonstick surface on the aluminium rail so it can be removed once the epoxy putty hardens. Clear packing tape serves as the perfect mold release. make sure that only the screw protrudes 'unmasked'. | |
Once
the bonding areas are protected with the tape and the screws are fastened,
a bead of epoxy putty is 'buttered' on. Make sure to force the epoxy into
every 'nook and cranny' around the nut. The putty consists of epoxy, colloidal silica (Cabosil) and milled fiberglass. For high stress bonding like this, it is a very good idea to reinforce the epoxy matrix with longer fibers like the milled fiberglass (milled Kavlar or carbon). TIP: If you don't have milled fiberglass, take a scrap of fiberglass or better still some graphite cloth and chop it with scissors into 1/4" (6mm) or smaller bits. You will need only about a table spoon of this to make all the putty you need. The reinforced putty will be immeasurably stronger. |
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I
am doing the footbrace mounting right after the kayak
bonding operation. The fiberglass tape is still fresh. The footbrace
is placed on location markers drawn before the deck was bonded to the hull.
In this instance, I waited to bond the footbraces until the taping was finished
since the pegs sit right on top of the new tape. Removal of excess putty around the bond. Note the 5/8" Minicel foam spacer supporting the footbrace. The deck is on the right side. The spacer is there for two reasons:
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Close up |
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Next day (if fast epoxy is used) a tap with a hammer on the side of the foot peg will break the bond. Remember to loosen the screws first !! | |
Cleaning
up. The bonded area is perfectly molded to the shape of the rail. Now, the removal of the footbraces for whatever reason will be a snap and if you decide to install something totally different at a later date, you don't need a stick of Semtex to blast the footbraces off :) See also 24ab. Mounting sliding footbraces |
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Last page update:
9 May 2024