PROSOCO R-Guard Joint & Seam Filler is a gungrade, crack and joint filler, adhesive and detailing compound that combines the best of silicone and polyurethane properties. This single-component, fiber-reinforced, Silyl-Terminated-Polymer (STP) is easy to gun, spread and tool.

Use Joint & Seam Filler to fill openings and create transitions where flexible reinforcement is required to bridge larger gaps and provide continuous support of fluid-applied flashing membranes, waterproofing or air barrier components.

Suitable for all climates, Joint & Seam Filler bonds directly to damp or dry surfaces and cures under a variety of weather conditions. It dramatically reduces surface preparation time by eliminating the need for reinforcing tapes at sheathing joints, inside and outside corners.

Use Joint & Seam Filler as part of a continuous, building-wide air barrier system, or to prepare surfaces for conventional waterproofing or air barrier components. Joint & Seam Filler may also be used to repair cracks or fill voids after the primary R-Guard air barrier has been applied.

Advantages

• Streamlines preparation by eliminating the need for joint reinforcing tapes.
• Silane functional polymer provides superior long term adhesion, crack filling and weathering characteristics.
• Bonds to most common building materials without priming.
• Single component saves time – no mixing.
• Fills open joints and seams up to 1 inch in width.
• Bonds and cures in wet weather and on damp substrates. Tolerates rain immediately after application.
• May be fully exposed to UV and weather for up to 12 months. If longer, contact for inspection.
• Compatible with most sealants and waterproofing or air barrier components.
• Solvent free. Isocyanate free. Phthalate free.
• No shrinkage. No staining. No yellowing.
• Breathable – allows damp surfaces to dry.
• Will not support mold growth.
• Service temperatures from –75°F to 300°F (–59°C to 149°C).
• Passes ASTM E84, Standard Test Method for Surface Burning Characteristics of Building Materials.