... and heavy filling 4.100% recyclable PP 3-Layer Foam Board 4 Post Binder/PP 3-Layer Eco-Friendly Non-toxic ... Waterproof Pipe Binder/Durable binders: PP 3-Layer Foam Board Features:1. PP 3-layer foam board covers, eco-friendly, non-toxic, high ... intensity, 100% recyclable material2. 25% lighter than general PP board, waterproof, durable3 ...