How to Avoid and Fix Common Problems When Using UPVC Solvent Cement

Avoid

UPVC solvent cement is a very adhesive material that helps connect UPVC pipes and fittings without any leaks. However, if used improperly, these are quite common problems that may lead to leaks, weak bonds, or messy joints might occur. Understanding these issues and how to rectify them can save time and effort while ensuring a successful installation.

Top Common Problems When Using UPVC Solvent Cement and Fixing Guide

Pipes Do Not Stick Properly

One general problem is that the pipes may not bond well even after applying cement. It often occurs with dirty, uneven, or not prepared surfaces of the pipes and fittings. Dust, grease, or moisture on the surfaces may affect the adhesive bond. Using an excess or insufficient quantity of cement, or in some cases, not applying it evenly might also cause this problem.

To fix this, one should ensure that the cement is applied to the cleaned pipes and fittings as most of these products are not good without cleaning. A primer helps smooth the surface and prepares the place for good bonding. Use a brush to apply cement evenly and ensure there is no space between the cement applications.

Leaks at the Joint

Another frequent failure is leakage due to water leaching from the joint when the pipes are joined together. This is usually the case when the cement was not allowed sufficient time to dry, or the pipes were not pushed altogether when joined. At times, mismatched sizes of pipes and their corresponding fittings also contribute to such a condition.

To prevent leakage, allow the UPVC solvent cement to be set for at least 15-20 minutes before applying a water test on the joint. Always push and twist the pipes firmly when connecting them to ensure the connection is tight and leak-proof. Make sure that all pipe and fitting sizes are an exact match to fit perfectly.

Solvent Cement Dries Too Fast

If the UPVC cement becomes hard before you can connect your pipes, it might dry out because of excessive exposure to air or hot temperatures. When it dries too fast, the cement is not in its best condition, meaning the bond will not stick out as it should.

To resolve this, keep the cement container tightly closed when not in use to prevent it from drying out. Work quickly and apply the cement in small sections to minimize exposure to air. If you’re working in hot weather, try to work in shaded areas or during cooler times of the day.

Excess Cement on the Outside

Spilled or excess cement from the outer face of the joint creates an untidy and unprofessional look in the installation. This is attributed mostly to applying too much cement or waiting to wipe off the excess after joining the pipes.

The problem can be solved by using the right amount of solvent cement only when applying it. A thin layer is just enough to achieve a robust bond. After joining the pipes, wipe off excess cement immediately with a clean cloth before it dries.

Weak Joints After Drying

At other times, the joint may be so weak that it falls apart upon drying. This may happen if the pipes cannot be held together long enough for the cement to set properly, or if the cement used is old and has lost its adhesive properties.

To avoid this, hold the pipes together tightly for at least 30 seconds after applying the cement. This will allow the bond to set in place. Check the expiry date of the cement before using it since expired cement may not work properly.

Workability with Cold Weather

With cold weather, the UPVC solvent cement drying slows down considerably, which makes it impossible to finish the job quickly. This delay becomes frustrating especially when one is in a hurry to test the system. Work in a warmer environment or increase the drying time for the cement so that it can fully cure. Do not rush the process since testing the pipes too soon may weaken the bond.

Heavy Odor or Fumes

The UPVC solvent cement gives off strong fumes that can be very pungent and even toxic in high concentrations. These occur due to the chemicals escaping during application.

Minimize your exposure by working in a well-ventilated space. Open windows or run a small fan to circulate the air. If it bothers you, wearing a mask will minimize the discomfort.

Cracking Near the Joint in Pipes

Pipes can sometimes crack near the joint after being joined. This happens when too much force is used during assembly, or when excessive UPVC solvent cement is applied, which can weaken the pipe material over time.

Apply firm but gentle pressure to avoid cracking when joining the UPVC pipes. Add just enough cement to cover the joint surface, avoiding loading of the pipe with cement and, consequently causing stress on the material.

Difficult Cement to Clean off Hands or Equipment

UPVC Solvent cement will bond quickly to your hands or any equipment. Once it dries, cement will be increasingly difficult to remove.

Prevention: Wear gloves when working with the cement. After using a tool, wipe it with a cloth or cleaning solution at once to stop the cement from drying on the tool.

Frequently Asked Questions

1. How long does UPVC solvent cement take to dry?

Ans: It typically dries in 15-20 minutes, but it can take as long as 24 hours to fully cure.

2. Can solvent cement be used on other types of pipes?

Ans: No, it is formulated only for use on UPVC pipes and UPVC fittings.

3. If I spill some solvent cement, what should I do?

Ans: Wipe it off instantly with a cloth. Dry spills should be cleaned with a cleaner that contains solvents.

4. Is UPVC solvent cement acceptable for use on drinking water pipes?

Ans: Yes, if it says it is safe to use as potable water.

5. Can I reuse leftover solvent cement?

Ans: Don't rejuvenate old cement. Use new cement for the best results.