Best Epoxy for filling holes - mounting transducer

 Hi all,

I am in the process of mounting a new transducer (I'll post a thread about the install when I am done). I will likely have a few holes to fill in the transom from the old transducer and was looking to do more than pump in silicone.


What recommendations do you have for an easy to find epoxy product in Perth that would be good for this job ?


thanks !  

Posts: 56

Date Joined: 15/03/11

Epifill from Whitworths.

Wed, 2020-10-28 15:02

Epifill from Whitworths. Great stuff

ranmar850's picture

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Date Joined: 12/08/12

Certainly don't use silicon

Wed, 2020-10-28 15:08

 This has never sealed a transom, just starts or continues the rot process. Make sure it is dried out first, then you have some choices. 

  1. A hardwood plug epoxied in is simple. Spend some time shaving it down so it will be a tight fit, liberally smear holes with 24 hr Araldite, coat plug with same, hammer home. Make sure the plug is slightly under flush, and end covered well with epoxy. Then you can put a dab of flo-coat over it, and even sand and polish it flat
  2. You can just try taping off one side, then force fibreglass resin or araldite in there, then hope it fill it. I prefer the hardwood plug for this reason.
  3. Make up a paste of fumed silica ( Cabosil) and resin , stiff enough so it wont run, then poke that in to fill the hole completely. Grind off and cover with flocoat.



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Date Joined: 19/06/14

FR 251

Wed, 2020-10-28 16:39

 Fibreglass and resin sales on Kew st in Welshpool will help you out.Thicken it with microbaloons to a consistency like toothpaste and Janines your aunty. Make sure you countersink all of your holes to give it something to bond into. Andys Boatworks on youtube is really good for tips n tricks.


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Marineboy's picture

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Date Joined: 14/03/14


Wed, 2020-10-28 17:50

bunnings sell some epoxy putty called knead-it from memory, there are various ones for various applications. You chop off a small piece from roll that comes in a plastic tube and like the name says knead it to mix it. I’ve used it numerous times to fill holes in glass, works a treat and easy to use.  




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Terry's picture

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Date Joined: 04/12/05


Wed, 2020-10-28 18:26

 Maybe have a look at Sikaflex 291i.  Made for wet eares apparently.  Hope you transom is not fibreglass as water ingress will stuff it very quickly and silently if not treated correctly.   Good luck anyway. 

Posts: 99

Date Joined: 13/02/17

Take Ranmar

Wed, 2020-10-28 21:46

 Take Ranmar's advise. He's all over it