wpc foaming floor is made by extruding or co-extruding , ... agent,stabilizing agent,foamimg agent,foaming adjusting agent etc.its made by extruding doughlike mixed material into different desired shapes,or ... anti-fading).2,Two typical types: pvc free foaming,pvc encrusted foaming.3,Its water-proof,anticrash,flame retardant(pass B ... but it could cause slight color variation. outdoor wpc foaming floor