● Chemical anchors rely on resin adhesion to bond the steel rod and concrete. Excess moisture in damp holes can create a thin water layer on the surface, weakening the bond between the adhesive and the substrate.
● High humidity can also slow down or disrupt the chemical reaction required for proper curing, leading to weaker anchoring strength.

● Most chemical anchors require a dry environment for optimal curing. In damp or high-humidity conditions, the curing process can be significantly delayed, which means the anchor might not reach its full strength within the expected time.
● Some resins, especially epoxy-based adhesives, can handle moisture better, but water-sensitive formulations like polyester resins may not cure properly in wet conditions.

● In water-filled holes, liquid resins may not properly adhere, and excess water can dilute or displace the adhesive, reducing effectiveness.
● If the resin is not designed for wet conditions, it may lose viscosity, making it difficult to properly fill the drilled hole and encapsulate the steel rod.

● Use moisture-tolerant resins (e.g., vinyl ester or certain epoxies) that can cure in damp conditions.
● Blow out and dry the hole thoroughly before injecting the resin to remove excess water.
● Check manufacturer guidelines for specific curing times and performance adjustments in humid or wet conditions.