SikaBond-T21 Flooring Adhesive

SikaBond®-T21 is a premium all-in-one wood flooring adhesive designed to simplify hardwood installations while delivering exceptional long-term performance. Engineered for professional-grade applications, this polyurethane adhesive creates a permanently elastic bond that helps reduce sound transmission, bridges minor cracks, and provides moisture vapor protection—all in a single product. Whether you're installing solid hardwood, engineered wood, parquet, bamboo, or cork flooring, SikaBond®-T21 offers the strength and reliability needed for demanding residential and commercial projects.

This one-component, moisture-cured polyurethane adhesive features a low-VOC formulation and serves as an adhesive, moisture vapor membrane, crack-bridging membrane, and sound reduction system in one application. It is compatible with concrete, plywood, OSB, cement-based underlayments, and properly prepared substrates. SikaBond®-T21 remains permanently elastic after curing to accommodate natural wood movement while providing a durable, long-lasting bond. Available in a 4-gallon pail, it is suitable for full-spread installations of solid hardwood, engineered hardwood, bamboo, cork, wood block, and parquet flooring.

PRODUCT DETAILS:

• Brand: Sika
• Product Name: SikaBond®-T21
• Product Type: Wood Flooring Adhesive
• Adhesive Type: One-Component Moisture-Cured Polyurethane
• Application: Full-Spread Wood Flooring Adhesive
• Compatible Flooring: Solid Hardwood, Engineered Hardwood, Bamboo, Cork, Wood Block, Parquet
• Compatible Substrates: Concrete, Plywood, OSB, Cement-Based Underlayments, Properly Prepared Existing Floors
• VOC: Low VOC
• Moisture Protection: Unlimited Moisture Vapor Protection
• Sound Reduction: Yes
• Crack Bridging: Yes
• Elasticity: Permanently Elastic
• Container Size: 4 Gallons
• Installation Method: Trowel Applied
• Interior Use: Yes