WELD-ON 725 Wet ‘R Dry is for use on rigid and flexible PVC pipe and fittings. It is specially formulated for applications where conditions are wet and/or quick pressurization is desired. It was developed to answer specific needs in irrigation, plumbing, and/or pool & spa. Can be used without primer on non-pressure systems if local codes permit. Although any WELD-ON primer may be used, we suggest the use of fast acting WELD-ON P-75™ Wet ‘R Dry™ primer in combination with this solvent cement.