Replies

1. 
   kate | Sep 30, 2005 06:12pm | #1

   Bump

1. 
   rez | Sep 30, 2005 06:20pm | #2

   38 minutes.

   Whew, bet Bob was sweatin' bullets he wasn't going to get a response :o)

   u r not a feckless dastard 

   Edited 9/30/2005 11:21 am ET by rez

1. 
   kate | Sep 30, 2005 08:21pm | #3

   Well, here I am with not enough to do...

2. 
   Mitremike | Oct 04, 2005 09:58am | #7

   Watch out rez--kate is gunning for your "Official Bumper" position.Mike" I reject your reality and substitute my own"
   Adam Savage---Mythbusters

1. 
   rez | Oct 04, 2005 04:40pm | #9

   I'd gladly pass the baton.

   be heading for the refreshment stand

    feckless dastards? 

    

1. 
   kate | Oct 05, 2005 01:02am | #10

   rez -

   I couldn't possibly work up to your standard...I just happened by, & was interested in the answer, which I now have in spades!

   Kate

2. 
   timkline | Sep 30, 2005 08:22pm | #4

   every time I used polyurethane spray foam from a dispensing can, allowed it to cure, and then covered it with a polyurethane caulk,  (Sika 1-A) the foam would react with the caulk and re-expand and bleed through the caulk.

   switching to foam backer rods solved the problem

    

   carpenter in transition

1. 
   BobS | Oct 03, 2005 04:40pm | #5

   Thanks, Tim. I'll avoid the polyurethane caulk for this application. I've also heard butyl dissolves plastic like RFBI so I'll avoid that too. I'd like to use silicone or acrylic, but I'd like to hear that there are no compatibility issues first.

1. 
   BillBrennen | Oct 04, 2005 06:27am | #6

   Bob, What is RFBI? Don't recognize the term.Acrylic latex caulk works well over fully cured polyurethane foam. Give it a day to cure out, longer if a very deep fill, or if very low humidity. Otherwise, the water in the caulk will cause the foam to swell as it completes its cure.Bill

1. 
   BobS | Oct 04, 2005 04:09pm | #8

   Bill, I've only seen the RFBI term used here. Rigid Foam Board Insulation - like Styrofoam boards, thermax, etc.Good to know about the Acrylic Latex. Thanks.