Tek-Fill JM Single Component Acrylic Joint Mastic

Tek-Fill JM is a high-performance, single-component acrylic joint mastic engineered for professional interior applications. This product offers excellent adhesion to a wide range of building substrates, including concrete, masonry, wood, and plaster, making it an ideal solution for sealing expansion joints, control joints, and minor cracks in walls and ceilings.

Formulated for ease of use, Tek-Fill JM applies smoothly without the need for a primer in most cases. It cures to a flexible, paintable finish that withstands movement and thermal expansion, ensuring long-lasting protection against dust, moisture, and air infiltration. Its water-based formula ensures low odor and easy cleanup with water, making it suitable for occupied spaces and environmentally conscious projects.

• Single-component formulation for quick and easy application
• Excellent adhesion to concrete, brick, stone, and wood
• Flexible cure allows it to accommodate substrate movement
• Paintable surface compatible with most interior paints
• Low odor and water-based for safe indoor use
• Resists cracking and shrinking over time