I used Timberwolf Composite Shims with Liquid Nails Heavy Duty Construction Adhesive and Liquid Nails Subfloor Adhesive. I didn't read the Liquid Nails instructions, until after I used the products (...brilliant...) and they recommend not using them with plastic, vinyl or composite lumber.
I've contacted Liquid Nails and I'm awaiting their reply.
The shims are made out of HDPE (milk jugs) and cellulose (wood fiber).
Are the shims safe to use with Liquid Nails? Has anyone used composite shims with Liquid Nails? Will they react/weaken? What should I expect?