Some foams hold up OK to regular CA while others get destroyed by it. To be safe, spend a little bit more and get the FOAM SAFE CA at your hobby shop. If the CA that you applied hasn't cured yet, spray some kicker along the joint, wait 90 seconds and see if it is holding. I would then add clear packing tape across the entire joint just to give it some extra holding power. The packing tape availabe in most Rite Aid, CVS, Walgreens, etc. is decent, but you can get slightly thicker and stronger tape at your local Post Office.