Closing polypropylene strapping in professional palletizing with a secure, flat closure that does not damage adjacent products requires a metal seal calibrated for the specific hardness of PP, where the aggressive teeth of a PET seal would be counterproductive. This seal for PP strapping—also called a PP metal clip or smooth seal—is manufactured by Fortemo from galvanized steel with a calibrated interior for polypropylene plastic strapping, in boxes of 1000 units for 13-16 mm strapping, designed for warehouses, hardware stores, businesses, and palletizing operations where PP strapping is the dominant format.

Main Benefits

Specific calibration for PP: The interior of the seal is designed for the relative softness of polypropylene, which produces a firm closure without tearing the strap (a typical problem when applying a toothed PET seal to PP).
Uniform galvanized steel: Protection against oxidation in storage and transit, keeping the seal operational throughout the entire shipping cycle, even in Caribbean climates.
Compatibility with standard PP tensioners: Fits with common manual sealing and crimping tools for 13-16 mm strapping, without requiring proprietary tools.
Permanent and flat closure: When deformed with the crimper, the seal remains flat and without sharp edges, protecting the operator's hands and adjacent products on the pallet.
Controlled Fortemo production: Uniform tolerances throughout the box for reproducible sealing in professional palletizing lines.

Typical Applications and Uses

Palletizing of corrugated cardboard boxes in logistics warehouses and distribution centers.
Closing packages in hardware stores, businesses, and small companies with daily shipping flows.
Bundling of plastic pipes, light profiles, and grouped materials in workshops.
Sealing of compacted cardboard bags and regional export boxes with PP strapping.

Quality and Durability

An inexpensive PP seal fails in two areas: the galvanization is poor, and the dimensional tolerances are irregular (leading to seals that deform unevenly with the crimper, leaving some loose). Fortemo works with uniform galvanization and controlled dimensions, which distinguishes a professional-grade seal from a generic consumable that produces unpredictable closures every time the box is changed.

Also known as: Technical: PP strapping seal, PP metal clip, smooth seal, flat seal for polypropylene, PP packaging sleeve. In DR and Caribbean: sello PP, grapa para fleje PP, sello para zuncho PP. In other countries: PP strapping seal (USA), open seal (USA), sello PP (LATAM), grapa para zuncho PP (MX, CO), precinto para PP (ES).

Material	Stainless steel
Length	33 mm (1.3 in)
Internal width	17 mm (0.7 in)
Compatible with	Polypropylene (PP) strap, 13-16 mm (1/2-5/8 in)
Finish	Smooth

Box: Ancho	38 cm (14.96 in)
Box: Alto	8 cm (3.15 in)
Box: Profundidad	30 cm (11.81 in)
Box: Peso	5.0 kg

FORTEMO® PP strapping seal

13 - 16 mm (1/2 - 5/8 in) / Box of 1000 stamps

Features

Packaging dimensions

FORTEMO^® PP strapping seal