Reduce wall tile installation time by 50% with Spray-Lock Wall Tile Adhesive spray to install tiles up to 6 inches square or any mosaic tile on a backing. Use Spray-Lock WTA to install tile over porous or non-porous substrates. Grouting can be done within 1 hour of the adhesive application. Excellent solution for backsplash tile applications in the kitchen and bathroom at home or in a coffee break area of a business. Spray-Lock adhesive spray for wall tile application is approved for use in a shower by the Tile Council of North America. No offensive odors and non-flammable. Low VOC water-based adhesive.