Cannot change material on build

 void FadeTransparentMaterial(Renderer selectedRenderer)
     {
         foreach(Material material in selectedRenderer.materials)
         {
             material.SetFloat("_Mode", 2);
             material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
             material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
             material.SetInt("_ZWrite", 0);
             material.DisableKeyword("_ALPHATEST_ON");
             material.EnableKeyword("_ALPHABLEND_ON");
             material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
             material.renderQueue = 3000;
         }
     }
     void FadeBack(Renderer renderer)
     {
         foreach(Material material in renderer.materials)
         {
             material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
             material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
             material.SetInt("_ZWrite", 1);
             material.DisableKeyword("_ALPHATEST_ON");
             material.DisableKeyword("_ALPHABLEND_ON");
             material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
             material.renderQueue = -1;
         }
     }   

This code makes material transparent and opaque on runtime, but IT DOESNT WORK in build mode. Build zip included. Shaders:standard.