Boat Building Forum

Find advice on all aspects of building your own kayak, canoe or any lightweight boats

Re: Other: concrete kayak
By:Mike Savage
Date: 3/9/2012, 4:49 am
In Response To: Re: Other: concrete kayak (Kevin McAtee)

There is a product called gypsum concrete, lighter that conventional concrete that is used in renovations where they want add radiant heat in the floors of an older building, this might be worth a try? Kevin

Hi Kevin,
I think gypsum is a hygroscopic material even when set, same as what is used for medical casts. It would need a good sealing coat for use in the water.
Cement isn't hygroscopic once it cures, it's a cyrstaline 'glue' for the agregate.

Mike Savage
South West Cork

Messages In This Thread

Other: concrete kayak
gilad naor -- 2/21/2012, 10:22 am
Re: Other: concrete kayak
Robert N Pruden -- 2/21/2012, 12:45 pm
Re: Other: concrete kayak
Matthias -- 2/22/2012, 2:25 am
Re: Other: concrete kayak
gilad naor -- 2/22/2012, 3:26 am
Re: Other: concrete kayak
Dan Caouette (CSFW) -- 2/22/2012, 8:26 am
Re: Other: concrete kayak
Bill Hamm -- 2/26/2012, 2:31 am
Re: Other: concrete kayak
Mike Savage -- 2/26/2012, 11:19 am
Re: Other: concrete kayak
ancient kayaker -- 2/26/2012, 12:43 pm
Re: Other: concrete kayak
Bill Hamm -- 2/28/2012, 2:41 am
Re: Other: concrete kayak
Björn Thomasson -- 2/28/2012, 4:01 pm
Re: Other: concrete kayak
Bill Hamm -- 2/29/2012, 1:57 am
Re: Other: concrete kayak
Björn Thomasson -- 2/29/2012, 2:29 am
Re: Other: concrete kayak
Bill Hamm -- 2/29/2012, 1:59 am
Re: Other: concrete kayak *PIC*
Björn Thomasson -- 2/29/2012, 2:51 am
Re: Other: concrete kayak
Etienne Muller -- 2/29/2012, 3:23 am
Re: Other: concrete kayak
Björn Thomasson -- 2/29/2012, 4:03 am
Re: Other: concrete kayak
Bill Hamm -- 3/1/2012, 1:51 am
Re: Other: concrete kayak
Paul G. Jacobson -- 3/7/2012, 6:10 pm
Re: Other: concrete kayak
Rob Macks/Laughing Loon CC&K -- 3/7/2012, 8:57 pm
Re: Other: concrete kayak
Bill Hamm -- 3/8/2012, 2:09 am
Re: concrete or newspaper kayaks
Paul G. Jacobson -- 3/8/2012, 2:53 am
Re: concrete or newspaper kayaks
Jim Ham -- 3/9/2012, 12:13 am
Re: concrete or newspaper kayaks
Ulrik Schou -- 3/9/2012, 1:31 am
Re: concrete or newspaper kayaks
Björn Thomasson -- 3/9/2012, 1:11 pm
Re: Other: concrete kayak
John Messinger -- 3/1/2012, 5:44 pm
Re: Other: concrete kayak
Mike Savage -- 3/2/2012, 9:45 am
Re: Other: concrete kayak
Bill Hamm -- 3/4/2012, 2:01 am
Re: Other: concrete kayak
John Messinger -- 3/4/2012, 7:34 am
Re: Other: concrete kayak
Paul G. Jacobson -- 3/8/2012, 2:40 am
Re: Other: concrete kayak
Kevin McAtee -- 3/8/2012, 3:57 pm
Re: Other: concrete kayak
Mike Savage -- 3/9/2012, 4:49 am
Re: Other: concrete kayak
Robert N Pruden -- 3/13/2012, 6:02 pm
Re: Other: concrete kayak
John Messinger -- 3/14/2012, 9:46 am
Re: Other: concrete kayak
Robert N Pruden -- 3/14/2012, 9:58 am
Re: Other: concrete kayak
Cole -- 3/9/2012, 9:21 am