Boss 638 - Subfloor Collapsing Gel Adhesive - 29oz (Box of 12) checklist-We do not accept returns on this product or clear (non-opaque) coverings and

or clear (non-opaque) coverings and leave it exposed to the sun

Edge treatment helps boards fit snugly against each other

both of which act as vapor retarders and provide a neat finished appearance

the TubeSeal® Fastener creates a secure and airtight connection between the substrate and the continuous insulation layer

Prong for On-the-Wall Screw Assembly: The inclusion of a prong facilitates on-the-wall screw assembly

Boss 638 - Subfloor Collapsing Gel Adhesive - 29oz (Box of 12) checklist-We do not accept returns on this product or clear (non-opaque) coverings andBoss 638 Collapsing Gel Subfloor Adhesive is a premium grade construction adhesive designed to reduce floor squeaks and enhance bonding strength in subfloor installations. Its unique collapsing gel formula allows full contact with uneven or bowed subfloor surfaces, creating a strong, durable bond that helps eliminate movement and noise. Product Features: Collapsing Gel Technology: Fills gaps and uneven surfaces by collapsing on contact, ensuring