This ASTM E1745 technical data explains how a polyethylene film vapor retarder should be reviewed below concrete slabs. It separates standard limits from typical references, lot-specific results, and project-confirmed values for thickness, water vapor permeance, tensile strength, puncture resistance, conditioned performance, and traceability. Final acceptance should use the submitted grade, current reports, and a representative mock-up under intended project conditions.
PET film puncture resistance describes how a defined PET, coated PET, or adhesive-backed PET construction responds to a controlled penetrating load. The result may include peak force, probe penetration, energy to failure, and the visible break pattern. These values support comparison of films exposed to sharp edges, local pressure, handling, or converting stress, but only under matched specimen and equipment conditions. Surface compatibility and removal behavior must be confirmed with the actual sample before full use. Puncture resistance is only one failure mode; the PET film properties comparison guide explains how to review tensile strength, elongation, thickness, shrinkage, optical properties, and surface behavior alongside puncture data.
An aluminum panel protective film application must keep the visible finish protected from lamination through fabrication, transport, installation and controlled removal. It is relevant to mill-finish, anodized, brushed, painted, powder-coated and coil-coated aluminum, including aluminum composite panels. The main risks are trapped particles, scratches, edge lift, film movement, difficult peeling, residue and coating appearance change. Selection should be based on the actual surface, coating condition, fabrication stress, expected exposure and removal stage—not thickness or tack alone—and should be confirmed through an actual-panel trial before full use.
