Glues and Primers for PVC Pipe
GLUES AND PRIMERS
Much like the names or terms used for our products (Flexible PVC), the terms for the glues and primers are used in many different ways and contexts as well. Here is the best of the information that we have been able to find concerning PVC glues and primers. PLEASE BE CERTAIN that the product you purchase is specified for use with PVC pipe (even better if it states it is for use with flexible PVC pipe). There are cleaners and glues made specifically for PVC, for CPVC and for ABS and they generally do not play well together. As always, it is best to read the instructions on the glue/primer that you purchase for use to ensure it will work with your product, and that you are utilizing it properly.
All pipe surfaces intending to be glued should always be thoroughly cleaned with PVC pipe cleaner before gluing. Oils, dust and dirt accumulate during the manufacturing process which can affect the holding power of the cement/glue if the pipe is not properly cleaned.
We are often asked about the differences between the primer, cleaner and cement/glue products on the market. Essentially there are three main types of PVC pipe primer/cleaners:
Much like the primer used, it is extremely important to select the proper solvent cement (glue) for your flexible PVC product as well. Generally speaking, there are several different types of solvent cements available, as follows:
Most good solvent cements/glues have an applicator/dauber built into the lid of the container. This applicator/dauber can be used to apply cement/glue to pipe sizes up to about 3" in diameter. Generally speaking, most manufacturers recommend the use of an applicator brush measuring at least one-half the size of your pipe diameter if the diameter of the pipe is greater than 3" to allow proper coverage and allow enough time.
Most manufacturers recommend that their solvent cements/glues be applied in temperatures between about 40 degrees and 90 degrees Fahrenheit. A good rule of thumb below or above those temperatures is to only use the solvent cement/glue if the glue is easily stirred and not lumpy or coagulated. If the solvent cement/glue is frozen, lumpy or will freeze during application or curing, do NOT apply. Remember that outside the recommended temperature ranges, additional handling and longer curing times apply – please refer to your manufacturers’ recommendations if you have this need.
Drying/curing times also vary by manufacturer. Generally speaking, with temperatures between 40 and 90 degrees Fahrenheit, we’ve seen recommended cure times like the following:
Again, these vary by climate and also by manufacturer, and most manufacturers agree that you should add additional curing time when using flexible PVC products. Check also with the specifications on the container for use with flexible PVC products.
IMPORTANT NOTE - The primer used is intended to soften the pipe surface and prepare it for the application of the cement/glue. It is therefore important to apply your solvent cement/glue to the pipe and fittings while the primer is still wet in order to achieve maximum bonding strength.