PPG LR8123ZP(1-LITRE-CAN)

LR8123ZP Anti-Fret Etch Primer

Overview

LR8123ZP Anti-Fret Primer is a two-component etch primer incorporating molybdenum disulphide to prevent fretting corrosion between metallic joints subjected to vibration and mechanical stress. Specifically developed for aluminium alloy assemblies, it combines corrosion inhibition with anti-fretting performance while providing rapid drying characteristics. Qualified to key aerospace specifications, LR8123ZP is widely used on aircraft structural joints prior to assembly or the application of approved jointing compounds.

Key Technical Specs

• Product Type: Two-component anti-fret etch primer
• Product Name: LR8123ZP
• Technology: Etch primer with molybdenum disulphide
• Colour: Very dark green
• Mix Ratio (Volume): 1 : 1 (Base : TH34B Acid Catalyst)
• Optional Thinner: T105 or T112 (up to 10%)
• Pot Life: 4 hours at 21-25°C
• Induction Time: 15 minutes
• Recommended Dry Film Thickness: 4-8 microns
• Theoretical Coverage: 14 m�/L at 6 microns DFT
• VOC (Ready to Use): 745 g/L

Approvals & Specifications

• Qualified to DTD 900/4650
• Compatible with ABP 4-5144 jointing compound specification
• REACH Compliant

Performance Highlights

• Designed to prevent fretting corrosion in stressed metallic joints
• Excellent corrosion inhibiting properties
• Rapid air drying improves assembly efficiency
• Molybdenum disulphide provides anti-fret protection under vibration
• Suitable for aluminium alloy assemblies
• Can be lightly burnished after drying where close tolerances are required

Typical Applications

• Aircraft aluminium structural joints
• Fastener interfaces subject to vibration
• Faying surface protection
• Aircraft assembly operations
• Aerospace structural maintenance and repair
• Preparation before application of approved jointing compounds

Compatibility & Safety Notes

• Recommended for aluminium alloy substrates
• Compatible with jointing compounds qualified to ABP 4-5144
• Clean substrates using DeSoto® CN20 or Desoclean™ 45 solvent cleaner before application
• Agitate the mixed primer frequently during spraying to maintain molybdenum disulphide suspension
• Store between 5°C and 35°C in original unopened containers
• Refer to the Safety Data Sheet (SDS) before use

Application & Curing

• Mix Ratio: 1 part LR8123ZP Base to 1 part TH34B Acid Catalyst
• Add up to 10% T105 Anti-Chill Thinner or T112 General Purpose Thinner if required
• Induction Time: 15 minutes
• Pot Life: 4 hours at 21-25°C
• Application Temperature: 15-35°C
• Relative Humidity: 30-85%
• Apply one or more wet coats to achieve a dark, opaque finish
• Minimum Air Dry Before Assembly or Jointing Compound: 1 hour
• Dry to Touch: 20 minutes
• Dry to Handle: 45 minutes
• Dry to Mask: 2 hours
• Full Cure: 7 days

Packaging & Procurement

• Supplied as a two-component primer system
• Base Component: LR8123ZP
• Acid Catalyst: TH34B
• Optional Thinners: T105 Anti-Chill or T112 General Purpose
• Available through PPG Aerospace distribution channels

Why This Product is Chosen for AOG / MRO

• Prevents fretting corrosion in highly stressed aircraft joints
• Fast drying supports efficient aircraft assembly and repair schedules
• Excellent corrosion protection for aluminium structures
• Compatible with approved aerospace jointing compounds
• Qualified to recognised aerospace specifications

Practical Suggestions for Your Team

• Thoroughly stir the base component before mixing to fully disperse settled solids.
• Continue agitating the mixed primer during spraying to prevent molybdenum disulphide settlement.
• Allow at least one hour of air drying before assembly or applying jointing compound.
• Apply only the minimum film thickness required to maintain close-fitting joints.
• Use approved DeSoto® cleaning solvents for surface preparation and spray equipment cleaning.

Manufacturer / Aviation Spec Codes

• Product Name: LR8123ZP Anti-Fret Primer
• Manufacturer: PPG Aerospace (PRC-DeSoto)
• Product Type: Two-component anti-fret etch primer
• Primary Application: Aluminium aircraft joint protection against fretting corrosion
• Specifications: DTD 900/4650, Compatible with ABP 4-5144