A new foam cell stabilizer for rigid PVC profile and trim board extrusion is said to provide controlled and finer cell structure without voids. Other benefits of Foamaid FA-101 from Addisperse, Inc., Bensalem, Pa., are said to include reduced release of volatiles during foaming, improved surface quality, better melt stability, lower die build-up and plateout, and reduced yellowing at the core of thick foamed extrusions. (215) 352-3835 • www.addisperse.com
Editor PickSizing the Barrier Gap
Here’s a less complex way to properly size the barrier gap for barrier screws.