There are prior posts saying spray foam has worked for some and not for others. I believe some of the differing experiences have to do with how actively the boat is sailed, whether or not the foam was shot into a clean dry space, and what grade of foam was used.. . . has anyone tried the foam spray from a can and what were the results?
How about this alternative?"...The block needs to be refastened it's entire length top and bottom to provide support to the deck and hull..."
It can be done, but unless you own the equipment, the pre-packaged commercial spray kit for 2 lb density marine grade comes in sizes uneconomical for a small job.has anyone tried to spray the two part foam in between the blocks and the hull?
It's do-able, but due to the complexity it's considered a last resort best reserved for someone with either prior small boat hull repair experience or the patience to climb a very steep learning curve. Not recommended for anything less than full flotation block replacement or very extensive hull/deck repair.without doing a lot of research in archives, has the possibility of separating the top and bottom hull sections ever been tried?
addendum (12-08-09):
Shortly after my last post I emailed DOW and inquired about some of the new foam-in-a-can products they've introduced recently.
Wasn't that Monsanto? Anyway, the instructions are right on the side of the RoundUp bottle under active ingredient 2-4-D. But this is getting off-topic, I just want to fix Sunfish, not defoliate them.Dow Chemical huh?, ask them about directions for use of 'Agent Orange' and see if you get another 'Customer Care' survey.
I fixed one of my boats using foam in a can "Great stuff". ...I am happy with the results, ...although my boat leaks very little and I take time to thoroughly dry it out after each use.
Just wondering, did the foam flow around the edge of the block so that it sort of locked the block in place by forming a ridge between the deck and foam block?
Sir,
Thank you for contacting The Dow Chemical Company.
You had written in looking to find a spray foam that could be used in a boating application. Unfortunately none of our products have been tested for any aquatic applications. So we won't have a recommendation for your application.
If you have any questions, please call us at 866-583-2583 Monday through Friday from 8:00 am to 5:00 pm Eastern Time
You can also visit our www.styrofoam.com or www.dowbuildingmaterials.com web site and use the ANSWER CENTER link for technical questions 24 hours per day.
Best regards,
Jeffrey Sygo
Customer Information Group
Dow Building Solutions
The Dow Chemical Company
(866) 583-2583
www.dow.com
In the real world there's waterproof and then there's waterproof.The negative on the Great Stuff seems to be related to it not being waterproof
Those new varieties of DOW foam were included in my original inquiry. Judging from the vagueness of the reply, I'm wondering if these foams do hold when surrounded by a high moisture atmosphere, but in their intended use it would make no difference whether they become waterlogged or not. Remaining unsaturated and light weight probably isn't part of a garden pond's functional criteria.has anyone used the waterfall foam or aquascape foam like dow great stuff pond and stone? It seems like if it is designed to be submurged, then it should not absorp so much water. also, it is minimally expanding, so it seems like its density would be pretty high.
You are supposed to use paints and solvents in a well ventilated area.. . . And the frogs agreed to volunteer for RC.
Remaining unsaturated and light weight probably isn't part of a garden pond's functional criteria.
Too bad there is not some way to use inflatable air bladders instead of foam.
That would be great, but what do you do for reinforcing the hull? The styrofoam blocks act as stiffeners.Has anyone considered installing the cubitainers from a laser in the hull of the sunfish, instead of trying to pour in expanding foam for the foam blocks. Especially is you added some hull-to-deck support?