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Technical Articles
 
Home >> Technical Articles >>An Alternative: Resin Injection
An Alternative: Resin Injection
Time: 2008-12-22
Epoxy resin injection with any industry standard 2:1 injection machine or Epoxy Systems' Injection Gun designed for Epoxy Systems' Injection resin is the only way of assuring quality installation. Single component caulking guns, pressure pots, or similar batching equipment are not suitable for injection.
 
As an alternative to an epoxy injection machine, Epoxy Systems, Inc. offers 450 ml binary injection system. This uses a binary caulking gun and static mix tubes to inject this resin.
 
Limit pressures to 40 p.s.i for most applications. Excessive pressures can create additional stressing of the crack. It can also cause hydraulic lifting, rupturing of the cracked substrate, or further elongation of the crack. Low pressures allow gradual resin flow into the crack for deeper penetration. On vertical cracks, injection is start at the lowest point, and continue upward on the crack area. While injecting the lowest port, resin will flow to and out of the next higher port.
 
When pure resin is flowing out the next port cap, plug the current injection port and move to the next port. Then injection continues in the port showing resin flow. This procedure continues until all ports are full.
 
Epoxy Injection Resin Systems should be of very low viscosity, for most applications. That way it will flow in the smallest hair line cracks. Resin can travel several feet from the point of injection. It may take some time before reaching the next port or penetrating through pin holes in the surface. Coring samples have shown that epoxy injection effectively fills cracks including small voids and hairline cracks.
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