White Speed Set #25 Custom Thin-Set Mortar

White Speed Set #25 Custom is a high-performance, polymer-modified thin-set mortar designed for fast, reliable tile installations. Its quick-setting formulation makes it ideal for time-sensitive commercial and residential projects, even in cold-temperature or submerged environments. Engineered for strong adhesion and flexibility, this white powder mortar yields professional results with grouting in as little as 3 hours and light foot traffic in 4 hours.

Whether you’re installing ceramic or porcelain tile on plywood substrates or cement backer boards, White Speed Set #25 Custom delivers exceptional bond strength, ease of use, and long-lasting durability.

Key Features

• Polymer-modified formula for enhanced bond strength and flexibility
• Rapid setting: grout in 3 hours, light foot traffic in 4 hours
• Suitable for commercial, residential and cold-temperature installations
• Ideal for ceramic and porcelain tile, including submerged applications
• Ready-to-use powder in a convenient 25 lb. bag
• Works on plywood and cementitious backer boards

⚠️ WARNING: This product can expose you to Silica, crystalline (airborne particles of respirable size) known to the State of California to cause cancer and Chromium (hexavalent compounds) known to cause birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.