2-Part Urethane Foam to repair soft spots?

Briang701

Rank: Lubber

Registered: Apr 29, 2009

Last visit: Jan 22, 2012

Posts: 3
Posted: Jul 11, 2010 - 02:05 AM

I have an '83 Prindle 16 and the inner side of the port hull from the center of the tramp forward is pretty much a giant soft spot. I was going to use thickened west systems until I discovered the full extent of the soft spot. I have done a good bit of work with composited before and I was thinking of just using a 3 or 4-lb density A B Urethane foam and just inject it similar to how its done with west systems, the only reason I don't want to use west is because of the cost associated with that product . What do you guys and gals think?

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P16
Lake Wylie, SC
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erice

Rank: Mate

Registered: Feb 19, 2008

Last visit: Aug 26, 2023

Posts: 671
Posted: Jul 11, 2010 - 06:57 AM

guess it might work for a bit....do and get back to us with the results
TurboCat

Rank: Mate

Registered: May 30, 2007

Last visit: Jun 28, 2011

Posts: 101
Posted: Jul 12, 2010 - 03:55 PM

I would try the traditional penetrating epoxy fix before i used A/B foam. You can get Get-Rot epoxy or a similar penetrating epoxy pretty cheaply.
jsoder12

Rank: Lubber

Registered: Jun 10, 2012

Last visit: Jul 09, 2013

Posts: 24
Posted: Jul 05, 2012 - 10:59 AM

Briang, did you do the repair? And if so, what did you use and how?

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Jeremy Soder
Nacra 5.8
Allen, TX
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coastrat

Rank: Chief

Registered: Jul 16, 2009

Last visit: Oct 28, 2014

Posts: 1271
Posted: Jul 05, 2012 - 01:35 PM

standard polyester resin(bondo/3m brand 30$ gallon) works fine for injection. 2 part foam can expand way too much and do more damage than good, it also absorbs water and gets heavier as time passes. injection repairs can be rock solid and last a long time so don't be afraid!

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bill harris
hattiesburg, mississippi
prindle 16- "BLUE RIBBON"
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turbohobo

Rank: Mate

Registered: Oct 19, 2006

Last visit: Aug 16, 2017

Posts: 613
Posted: Jul 05, 2012 - 05:48 PM

2 ways to do this, you can either take tramp off, separate hulls by removing beams so that you can place hull soft side up and level, which takes a lot more time, or flip entire P16 on its side soft side up and level, leaning it against some sort of support, (tree, side of house), tape delaminated area off with masking tape, and use product as suggested by coastrat. One word of caution, do whatever it takes to make sure you break through outer skin only when drilling holes, penetrating through inner layer just causes all sorts of problems and delays and wastes much resin. 2nd method much quicker and you can be up and sailing again in a couple of days.

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TurboHobo
H14T
H16
P18
G-Cat 5.0
P16
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