Ice Box insulation. Can I use the home depot styrofoam and

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B

Bob

glue it outside of the existing box? 1" is R5 so I figure 4" would give R20

There's noo insulation on the 88 hunter 40 ice box and ice melts FAST
 
R

Ross

Yes. Use the pink extruded stuff and fill the voids with

Great stuff canned foam. Canned foam also works as an adhesive for foam. When you are through with the insulation cut some polyester fabric(an old sail works) and use 3M spray adhesive to cover and protect the foam. Then you can paint that with gloss acrylic house paint.
 
B

Bob

Thanks for the info Ross!

Any suggestion on the glue to use to attach the insulation to the fibreglass ? will the 3m spray on work for that ?
 
R

Ross

The 3M spray doesn't fill any gaps.

PL premium urethane caulk is good and fairly fast cure. Give thought to how you fit the foam around the door. You will want plenty of thickness but sill need to be able to swing the door.
 
S

Scott On Eagles Wings

Be careful

The sparay foam will hold lots of water. Do not use if it is going to get wet on more than just the rarest of occasions.
 
R

Ross

Scott, On what do you base this statement?

Canned urethane foam is closed cell, rigid foam developed for use in sealing leaks in building. I have used it for gluing foam together for pontoons and countless other less interesting projects. The merchants in Annapolis, Md used it to seal the doors in their store fronts against the flood waters of hurricane Isabel and it worked. This application will be inside a boat, above the bilge.
 
S

Scott On Eagles Wings

Fire Tanker Truck

A few years back we had a new tank constructed for our fire tanker. The folks that made the tank got the math wrong and filled a large area of the tank with none other than spray foam. We did not know they had done this. A few months went by and we noticed the truck sitting lower and lower on its springs. We took it to get weight and found we were carring a lot more water than had been specked (about 500 Gallons more water). Drained the tank crawled up on in there and found copious amounts of this foam completely saturated with water. It held as much water as a sponge.

I realize a fire tanker is not the same application as his fridge but if it is in contact with water it will act as a sponge over time thus the warning. I know it says closed cell foam, however at least inside a tank it is most certainly not. Be well Ross thanks for asking.
 
E

Ed

So if your boat sinks

and is raised a few months later, it might sit a little lower in the water. and if you have an atomic4 your boat will blow up. and if you keep your ammo in a different location than your rifle, you won't have enough time to lock and load before the pirates swarm your boat. and if you have a hunter the keel will fall off. and if, and if, and if.
 
R

Ross

Scott, In the case you relate the foam was

subject to low order ststic pressure for an extended period of time. If you discharge a can of foam onto the surface of water it hardens immediately on the bottome and cures normally otherwise. Another can dicharged on a newspaper will weigh approximately the same even if you allow the foam to continue to float for a week or more and allow it to surface dry after removing it from water. Even a wooden plank would have gained weight under the conditions you discribe.
 
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