New Boat Decking....foam?

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danmyersmn

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So, I wanted to make sure I wouldn't need to do anything more then just go pick up my A/B foam and I did a quick check of the site I plan to pick it up at. Then I stumbled on this:

https://www.duratec1.com/dpstyrosafelaminatingresin.html

A pre-accelerated, orthophtalic, unsaturated polyester resin, diluted in styrene and methacrylic monomer with medium reactivity and medium viscosity.

Usage
For laminating directly on polystyrene low-density foam without an
intermediate barrier. StyroSafe is formulated for applications where
adhesion to an expanded polystyrene is required. These applications
could include surf and windboards; CNC-shaping of patterns and
models; lamination of hot-wire cut foam; decorative foam for building
facades; floating docks; and thermal insulation barriers..

Product Properties (at the time of manufacturing)

Viscosity
Run on Brookfield model LVF@72°F,
30 RPM, Spindle #2 - 835-865 cps

Gel Time
Run @72°F, 1% Cadox, L-50 - 21-25 minutes

Solids - 34-36%

Packaging - 225 kg lined drums, and 5 gallon pails

Storage Stability
The product is stable for six months if stored in a stainless steel tank
or lined drums (avoid glass fiber-based containers or tin-plated drums)
at 20°C, in a dark/ventilated place. Keep away from iron
and copper salts, organic and inorganic peroxides.

Product Safety
The product is flammable and harmful. Further information is provided
in the relevant safety data sheet.



Application Information
Although StyroSafe Fast Cure Laminating Resin #30P-105A is compatible with low
density polystyrene foam, there are some precautions to follow when
using the product:

* Do not leave a "puddle" of resin on the foam after laminating onto
the surface as some chemical attack can occur due to excess exotherm
development.
* After the first, or "skincoat," laminate has been applied, wait until it
exotherms and cools before following with the next laminates. Too
much exothermic heat will melt the foam.
* Catalyze at 1% Cadox L-50.
* Apply at least two laminates made with StyroSafe resin before
switching to a GP resin system as the two laminates will insure that
there will be no chemical attack of the foam.
Note: Based on industry Information about Expanded Polystyrene Foam
we do not recommend that the foam be subject to vacuum or temperatures
above 160° F.


So I started thinking about going with glass over foam for a deck. So if you where to replace 1/2" exterior plywood with 1/2" blue foam you would loose a ton of weight. But how many layers would you have to put down of glass & cloth? I would think you would need a bunch and you would be putting most of that weight right back into the deck in glass and resin.
 
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