Bob Smith Industries BSI-107 Insta-Cure+ Gap Filling CA Glue is a high-viscosity adhesive designed for filling gaps in loose-fitting joints. Ideal for applications where standard CA glue might not bridge spaces, it works by applying a thicker bead to one surface and holding the parts together for 5–15 seconds. Perfect for laminations, large surfaces, or uneven joints, Insta-Cure+ spreads under pressure to create a strong, durable bond. Avoid applying in a thin film to prevent premature curing and ensure optimal performance.