What Is The Difference Between Epoxy And Polyurethane Resins Used In Crack Injection?
Introduction

Crack injection is a process of repairing foundation cracks, which you would know about if you’ve ever had leakage repair in your basement. According to experts offering water leakage solutions in Delhi, crack injection is the most common, easiest and cheapest way of fixing foundation cracks that involve relatively very limited basement waterproofing products. Crack injection involves forcing a fluid resin into a crack in the foundation wall at low or high pressure (depending on the need) that cures the crack once it solidifies. There are two types of resins used in crack injection, which are used based on the characteristics of the crack to be repaired.

The Two Types of Resins Used In Crack Injection

Epoxy and Polyurethane (also called just Urethane) are the two types of resins used in crack injection, according to construction chemical manufacturers in India. Now, we compare the characteristics of these two, which are wholly different:
·      Epoxy: Epoxy resin is essentially glue, which once it is cured has an even greater strength than concrete. This makes epoxy ideal for structural crack repair. Epoxy doesn’t bond with wet surfaces and is usually injected at low pressures (40 psi).

·   Polyurethane: Polyurethane is very different from epoxy. Polyurethane expands as it cures, and doesn’t have any actual strength as compared to epoxy. Polyurethane is highly reactive to the presence of moisture, very flexible and expansive. All these qualities make it an ideal choice for leaking foundation crack repairs. Polyurethane can be done at both high (1200-1400 psi) and low pressures (40-60 psi).
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