Weld-On 13550 740 Clear Pool PVC Solvent Cement 1 gal delivers bonding strength and stability that contractors can trust for pool plumbing installation and repair. This PVC pipe cement is suitable for use with all classes and schedules of rigid PVC pipes and fittings with an interference fit up to a 4-inch diameter (except Schedule 80). It is formulated specifically for pool and spa PVC pipe applications (including foam core piping). And thanks to its regular-bodied viscosity and fast relative set time, this PVC solvent cement applies smoothly and sets quickly to help facilitate efficient PVC welding.