I prefer the putty over mat to bed in transoms and core.
The reason why is that you can't prep the surface perfectly flat. With slight waves in the ground surface, putting flat plywood or core material against it will create resin rich and resin starved spots in the mat. Putty allows for these variances and the strength isn't compromised.
I use a notched trawl to spread the putty. Look at my Viper restore to get an idea how I used the putty. It's the feature topic on the IHR:
http://hydrostream.org/Topic.htm
I wrote this article in detail to help HydroStream owners understand not just how to do the job but why I chose my method with the pro's and con's to each process.
Don't get me wrong,....I'm NOT saying if you bed in your transom or core with mat, it will come apart. Just that the putty is lighter, has more "peel" strength as it's an adhesive, and is easier to use.
I am currently using Core Bond putty to bond in the transom in my Virage. (Yes, plywood is "primed" with resin before installing)
I prefer the putty over mat to bed in transoms and core.
The reason why is that you can't prep the surface perfectly flat. With slight waves in the ground surface, putting flat plywood or core material against it will create resin rich and resin starved spots in the mat. Putty allows for these variances and the strength isn't compromised.
I use a notched trawl to spread the putty. Look at my Viper restore to get an idea how I used the putty. It's the feature topic on the IHR:
http://hydrostream.org/Topic.htm
I wrote this article in detail to help HydroStream owners understand not just how to do the job but why I chose my method with the pro's and con's to each process.
Don't get me wrong,....I'm NOT saying if you bed in your transom or core with mat, it will come apart. Just that the putty is lighter, has more "peel" strength as it's an adhesive, and is easier to use.
I am currently using Core Bond putty to bond in the transom in my Virage. (Yes, plywood is "primed" with resin before installing)
[img]http://i45.tinypic.com/fye6wg.jpg[/img]