2-part urethane foam question

Submitted by Ed on 3/8/06 at 5:33 PM. ( ) 216.135.2.28

The archives tell me that some peaople on here have had shelf life of up to a couple of years for the two part urethane foam. I recently used some foam about a year old for a rock project. The foam expanded in a bubbly mass which did get hard but it does not have the density of a typical foam pour. My question is have I over extended my shelf life? The contents of the quart kit were perfectly normal when first used and have been sealed tight since. Thanks Ed

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did not mix right I would guess

This response submitted by JOE on 3/8/06 at 8:24 PM. ( ) 69.171.246.15

try it again and use approximately 50-50 on the mixture....



Mix it up GOOD

This response submitted by deer4ager on 3/8/06 at 10:43 PM. ( deer4ager@juno.com ) 66.44.243.226

I used almost a whole quart on a habitat. Did not get hard, It stayed spongy. Turns out I didn't mix it up enough.
After that I took a piece of 12gauge wire put a couple loops in one end, put it on the drill and mixed the crap out of it. No more problems.

Has your ever frozen? That is so that could be the problem.


by weight

This response submitted by Brian on 3/9/06 at 9:40 AM. ( ) 67.50.234.158

Most of the expandable urethanes are to be mixed 50/50 by weight, not volume.


Brian

This response submitted by Alex on 3/9/06 at 4:35 PM. ( ) 66.32.89.146

Is Right, you need a scale not mixing cups and you need a paint blender with a drill and mix good and work fast


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