How Humidity and Damp Holes Affect Chemical Anchor Performance | Sold in 40 Countries Injectable Chemical Anchors Manufacturer Since 1997 | Good Use

Chemical anchoring in damp holes

Chemical anchoring in damp holes

How Humidity and Damp Holes Affect Chemical Anchor Performance

Humidity is a key factor when installing chemical anchors, as it can affect bonding strength and potentially lead to installation failure. Selecting the appropriate chemical anchor before installation is essential to ensure successful anchoring.


16 Apr, 2025 Good Use Hardware Co., Ltd.
Reduced Adhesion and Bond Strength

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.

Slower or Incomplete Curing

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.

Potential Washout of Resin

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.

Solutions to Overcome Moisture Issues
  • Use moisture-tolerant resins (e.g., vinyl ester or certain epoxies) that can cure in damp conditions. The GU-500SD advanced pure epoxy chemical anchor is a perfect option for anchoring in humid environments and while still delivering complete cured strength.
  • 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.
Products
ETA approved injection epoxy chemical anchor designed for dowel bar retrofitting - Epoxy Anchor Designed For A Wide Range Of Climate Conditions
ETA approved injection epoxy chemical anchor designed for dowel bar retrofitting
GU-500SD 400ml 3:1

GU-500SD pure epoxy chemical anchor has successfully received the European Technical Assessment report ETA-24/0928, confirming its high performance and reliability...

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ETA approved high-strength epoxy chemical anchor for concrete mounting systems - High Temperatures Dual Component Pure Epoxy Chemical Anchor
ETA approved high-strength epoxy chemical anchor for concrete mounting systems
GU-500SD 585ml 3:1

GU-500SD is our ETA-approved, high-performance pure epoxy anchoring solution, specifically engineered for demanding structural applications. Certified...

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How Humidity and Damp Holes Affect Chemical Anchor Performance | Sold in 40 Countries Injectable Chemical Anchors Manufacturer Since 1997 | Good Use

Located in Taiwan since 1997, Good Use Hardware Co., Ltd. has been an injectable adhesive mortars and anchors manufacturer. Their main products, including injection cartridges, chemical mortars, chemical anchors, anchor capsules, polyester resins and vinylester resins, which are sold in 40 countries.

Reputable factory of chemical anchor in Taiwan produces the widest range of adhesive anchor solutions for your concrete anchoring applications. with more than 15 years manufacturing experience for Chemical Anchor System, Injection Cartridge System, Construction Chemical Mortar and more. Certified chemical anchor solutions with wide selections of adhesive materials including epoxy anchors, concrete anchors, resin anchors for heavy loads in rebar application, diamond drilled holes and anchoring in solid concrete. Non-drip formula, ideal for overhead installation. Chemical anchor bolt and anchor fixings included for efficient, hassle-free, labor-saving chemical anchoring.

Good Use has been offering customers certified and tested high-quality chemical anchors, both with advanced technology and 25 years of experience, Good Use ensures each customer's demands are met.