solventcement

Solvent cement, also known as solvent weld, is an adhesive formulated to join rigid thermoplastic piping by fusing the pipe ends and fittings. It contains volatile solvents and a resin or polymer that temporarily softens the plastic surface, allowing the parts to fuse as the solvent evaporates and the resin rehardened.

The cement works by dissolving a thin outer layer of the plastic, enabling the mating surfaces to fuse into a single, monolithic joint. Common solvent components include tetrahydrofuran, methyl ethyl ketone, acetone, and related solvents, often formulated for specific plastics such as PVC, CPVC, or ABS. Some products are certified for potable-water or drainage systems, and manufacturers provide guidance aligned with plumbing standards.

Application typically involves applying cement to the pipe end and the interior of the fitting, then inserting the pipe fully and, if desired, giving a light twist to distribute the material. Excess cement should be wiped away before it sets. Cure and handling times vary with material, wall thickness, ambient temperature, and solvent formulation, ranging from minutes to several hours for initial set, with full strength developing over a day or more.

Safety and handling: solvent cements are flammable and emit fumes, so they should be used only in well-ventilated areas away from heat sources or flames. Wear protective gloves and eye protection, and store containers tightly closed in a cool, dry place.

Limitations and considerations: solvent cement is primarily suitable for certain rigid thermoplastics and is not appropriate for metal, glass, or non-thermoplastic joints. Proper pipe preparation, fit, and compliance with local codes and product certifications are essential for a reliable joint.