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3 Most Used Resin Types for Pipe Relining


The whole process of pipe relining focuses on articulating the resin liner into the pipeline. Simple but effective methods are used to ensure the resin liner doesn’t get damaged during pipe insertion. Basically, the resin liner is the core of the pipe relining solution. After all, the resin liner essentially becomes main pathway of the sewer wastes after pipe relining. Some homeowners don’t know there are different types of resin used for pipe relining. You will see a list of the basic yet most used resin types in pipe relining.   

The Polyester Resin Type

Polyester has the fastest curing time compared to the other two resin which we will discuss later on. This makes polyester a highly recommended material for those who want to finish a pipe relining project quickly. The reason why the curing process for polyester is fast is because it can be mixed with other substances. Another advantage of polyester is its affordability. It’s cheaper than epoxy resin and vinyl ester resin. So far so good; but polyester seems to have more disadvantages than advantages. These drawbacks discourage lot of contractors. One of such  drawbacks is the odour it produces. The odour comes from the styrene compounds found in polyester. Another issue with this resin are the volatile organic compounds (VOC’s) it contains. What is even more alarming is that the VOC’s are actually carcinogenic. This forces the repair crew to add equipment for proper ventilation. Polyester also has a fast shrink rate which can be a problem in the long run. You see, resin liners need to be bonded well with the old pipeline to be of actual use. As the years go by, the resin liner shrink loses its grip on the pipes and becomes less effective. This is normal but some resin liners shrink faster than others — just like polyester.

Epoxy resin

Epoxy resin is like the opposite of polyester. Many contractors actually prefer epoxy than polyester just because it has better durability. Epoxy shrinks just like any other resin liner but it’s rate is so slow. An epoxy resin liner bonded with a pipe can last for many decades or even a lifetime. It also doesn’t produce any odours or contain VOC’s. Property occupants don’t have to leave their homes since there is no threat of inhaling carcinogenic substances. One downside of epoxy is that it’s more expensive than polyester and vinyl ester. Considering the quality and safety; the price shouldn’t be a surprise. A true drawback of epoxy resin is the long time it takes to cure. The curing time even becomes longer if the resin has been frozen for a very long time.  

Vinyl ester resin

Vinyl ester is more of a combination of polyester and epoxy. The hybrid composition of this resin liner makes it the most resistant resin liner among the three in this list — and other kinds of resins out there. Vinyl ester can survive chemicals and acids that have pH range of 1 to 14. Unfortunately, it shares the same disadvantages with polyester.