WS-8072 Class B is a non-chromate corrosion inhibitive, light weight, fast curing polysulfide sealant. Two-part manganese cured polysulfide system with eco-friendly profile provides an effective barrier against the common causes of corrosion on aluminum and between dissimilar metals. AC-8072 B retains excellent performance characteristics at temperature excursions up to 360°F. Typical applications include sealing of fay surfaces of mating parts of aircraft structure to prevent corrosion and channeling leakage. WS-8072 Class B has outstanding retention of physical properties when exposed to aviation fuel and oils. It is a thixotropic paste with non-sag characteristics an able to be applied by an extrusion gun or with a spatula.

 

RTU Product Type: 2K (2 component) Sealant

Application Area: Aerospace Applications, Fuel Tank

Compatible Substrates & Surfaces: Aluminum, Aluminum Alloys, Coated Surfaces, Composites, Metal

Application Method: Extrusion, Spatula

Chemical Family: Polysulfides

Features: Corrosion Resistant, Excellent Fuel Resistance, Excellent Productivity, Fast Curing, Fungus Resistant, Good Adhesion, High Temperature Resistance, Light Weight, Low Density, Non-Sagging, Oil Resistant, Room Temperature Curing, Thixotropic

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Labeling Claims
Ready-to-Use Product Features
Features and Benefits Information

This product has following features and benefits;

  • Excellent corrosion protection for aluminum alloys and between dissimilar metals
  • Fast curing system significantly increasing productivity
  • Low density providing up to 30% weight saving
  • Eco-friendly profile creates safe environment and eliminates hazardous waste
  • Excellent elastomeric properties and strength retention after limited exposure to jet fuel, aviation gasoline, hydraulic fluids, oils, and lubricants
  • High temperature resistance with intermittent operational temperature up to 360°F
  • Outstanding adhesion to multiple metals, composites, primers, and coatings used in modern aircrafts
  • Non-nutrient containing, fungus resistant

Applications & Uses

Markets
Applications
Application Area
Application Method
Compatible Substrates & Surfaces
Cure Method
Segment
Application Instructions

Clean the surface of substrates with appropriated cleaning solutions per specification(s) using an OEM approved lint-free cloth to remove dirt, grease, and processing oils just before the application of the sealant. Pour solvent onto the cloth to avoid contamination of solvent supply. Clean in small areas at a time. Wipe with a second dry cloth after each application to prevent redeposition of the contaminants on the surface. Repeat at least three times or more if required. Use fresh a fresh wiping cloth every time. Substrate composition and surface characteristics can greatly vary, which can affect sealant adhesion. It is recommended to determine adhesion characteristics of specific substrates prior to application of the sealant to get consistency.

Properties

Physical Form
Physical Properties
ValueUnitsTest Method / Conditions
Mix Ratio (by volume, part B, base)100--
Mix Ratio (by weight, part B, base)100--
Ultimate Hardness45Shore A-
Peel Strength (at 140°F, JRF 7-days immersion)41pliIM 7/5250-4, AMS 2629
Peel Strength (at 140°F, titanium was immersed in JRF for 7 days)37pliAMS 2629
Peel Strength (at 140°F, titanium was immersed in JRF for 7 days)37pliAMS 4911
Peel Strength (at 140°F, titanium was immersed in JRF/3%SW (50/50) for 7 days)44/39pliAMS 2629
Peel Strength (at 140°F, titanium was immersed in JRF/3%SW (50/50) for 7 days)44/39pliAMS 4911
Peel Strength (at 140°F, titanium was immersed in JRF/3%SW (50/50) for 7 days)40/39pliIM 7/5250-4
Peel Strength (at 140°F, titanium was immersed in JRF/3%SW (50/50) for 7 days)40/39pliAMS 2629
Peel Strength (cad plated steel (4130 per QQ-P-416, 3%SW 2-day immersion at 140°F))39pli-
Peel Strength (cad plated steel (4130 per QQ-P-416, JRF 2-day immersion at 140°F))32pliAMS 2629
Peel Strength (cad plated steel (4130 per QQ-P-416, MIL-PRF-23699 2-day immersion at 140°F))32pli-
Peel Strength (cad plated steel (4130 per QQ-P-416, MIL-PRF-7808 2-day immersion at 140°F))40pli-
Peel Strength (cad plated steel (4130 per QQ-P-416, MIL-PRF-83282 2-day immersion at 140°F))38pli-
Peel Strength (graphite/epoxy, JRF 7-days immersion at 140°F)35pliAMS 2629, AS 4/3501-6
Peel Strength (graphite/epoxy, JRF/3%SW (50/50) 6 cycles)38/37pliAMS 2629, AS 4/3501-6
Peel Strength (at 140°F, graphite/epoxy was immersed in JRF/3%SW (50/50) for 7 days)39/41pliAMS 2629
Peel Strength (at 140°F, graphite/epoxy was immersed in JRF/3%SW (50/50) for 7 days)39/41pliAS 4/3501-6
Peel Strength (at 140°F 2-day immersion, magnesium, 3%SW)32pliAMS 4376
Peel Strength (at 140°F 2-day immersion, magnesium, AMS2629 JRF)35pliAMS 4376
Peel Strength (JRF/3%SW (50/50) 6 cycles)35/34pliAMS 2629, IM 7/5250-4
Peel Strength (at 140°F 2-day immersion, magnesium, MIL-PRF-23699)37pliAMS 4376
Peel Strength (at 140°F 2-day immersion, magnesium, MIL-PRF-7808)33pliAMS 4376
Peel Strength (at 140°F 2-day immersion, magnesium, MIL-PRF-83282)37pliAMS 4376
Peel Strength (titanium, JRF/3%SW (50/50) 6 cycles)41/35pliAMS 4911, AMS 2629
Viscosity10,000 - 15,000poise-
Mix Ratio (by weight, hardner:base)12:100--
Non-Volatile Contentmin. 96%-
Mix Ratio (by volume, hardner:base)7.9:100--
Service Temperature (continuous, operational range)-54 to 250°F-
Service Temperature (intermittent exposure)max. 360°F-
Low Temperature Flexibility (no loss of adhesion or cracking)-65°F-
Typical Properties
ValueUnitsTest Method / Conditions
Storage Temperaturemax. 27°C-
Peel Strength (cad plated steel (4130) per QQ-P-416, JRF 2-day immersion at 140°F, 100% CF, AMS 2629)32pli-
Peel Strength (AMS 4376 (magnesium), 3%SW 2-day immersion at 140°F, 100% CF)32pli-
Peel Strength (cad plated steel (4130) per QQ-P-416, MIL-PRF-23699 2-day immersion at140°F, 100% CF)32pli-
Peel Strength (AMS 4376 (magnesium), MIL-PRF-7808 2-day immersion at140°F, 100% CF)33pli-
Peel Strength (IM 7/5250-4 (BMI) (ply/ply), JRF/3%SW (50/50) 6 cycles, 100% CF, AMS 2629, ply side)34pli-
Peel Strength (AMS 4376 (magnesium), JRF 2-day immersion at 140°F, 100% CF, AMS 2629)35pli-
Peel Strength (AS 4/3501-6 (Graphite/Epoxy), JRF 7-days immersion at 140° F, 100% CF, AMS 2629)35pli-
Peel Strength (IM 7/5250-4 (BMI) (tool/ply), JRF/3%SW (50/50) 6 cycles, 100% CF, AMS 2629, tool side)35pli-
Peel Strength (AMS4911 (Titanium), JRF/3% SW (50/50) 6 cycles, 100% CF, AMS 2629, ply side)35pli-
Peel Strength (AMS4911 (Titanium), JRF 7-days immersionat 140° F, 100% CF, AMS 2629)37pli-
Peel Strength (AS 4/3501-6 (Graphite/Epoxy), JRF/3%SW (50/50) 6 cycles, 100% CF, AMS 2629, ply side)37pli-
Peel Strength (AMS 4376 (magnesium), MIL-PRF-23699 2-day immersion at140°F, 100% CF)37pli-
Peel Strength (AMS 4376 (magnesium), MIL-PRF-83282 2-day immersion at 140°F, 100% CF)37pli-
Peel Strength (AS 4/3501-6 (Graphite/Epoxy), JRF/3%SW (50/50) 6 cycles, 100% CF, AMS 2629, tool side)38pli-
Peel Strength (cad plated steel (4130) per QQ-P-416, MIL-PRF-83282 2-day immersion at140°F, 100% CF)38pli-
Peel Strength (AS 4/3501-6 (Graphite/Epoxy), JRF/3%SW (50/50) 7-days immersion at 140° F, 100% CF, AMS 2629, tool side)39pli-
Peel Strength (AMS4911 (Titanium), JRF/3%SW (50/50) 7-days immersion at140° F, 100% CF, AMS 2629, ply side)39pli-
Peel Strength (IM 7/5250-4 (BMI) (ply/ply), JRF/3%SW (50/50) 7-days immersion at140° F, 100% CF, AMS 2629, ply side)39pli-
Peel Strength (cad plated steel (4130) per QQ-P-416, 3%SW 2-day immersion at140°F, 100% CF)39pli-
Peel Strength (IM 7/5250-4 (BMI) (tool/ply), JRF/3%SW (50/50) 7-days immersion at140° F, 100% CF, AMS 2629, tool side)40pli-
Peel Strength (cad plated steel (4130) per QQ-P-416, MIL-PRF-7808 2-day immersion at140°F, 100% CF)40pli-
Peel Strength (AMS4911 (Titanium), JRF/3% SW (50/50) 6 cycles, 100% CF, AMS 2629, tool side)41pli-
Peel Strength (IM 7/5250-4 (BMI) (tool/ply), JRF 7-days immersion at 140° F, 100% CF, AMS 2629)41pli-
Peel Strength (AS 4/3501-6 (Graphite/Epoxy), JRF/3%SW (50/50) 7-days immersion at 140° F, 100% CF, AMS 2629, ply side)41pli-
Peel Strength (AMS4911 (Titanium), JRF/3%SW (50/50) 7-days immersion at140° F, 100% CF, AMS 2629, tool side)44pli-
Storage Temperature (premixed and frozen material is a minimum of 30 days)max. -40°C-
Storage Temperature (unopened container)max. 27°C-
Application Temperaturemax. 360°F-
BasePolysulfide--
Component B
ValueUnitsTest Method / Conditions
Viscosity (base)10,000 - 15,000poise-
Cured Properties
ValueUnitsTest Method / Conditions
Nominal Service Temperature (continuous, operational range)-54 to 250°F-
Low Temperature Flexibility (no loss of adhesion or cracking)-65°F-
Ultimate Hardness45Shore AShore Durometer Scale
Slump (B-1/2, B-2)max. 0.1inch-
Specific Gravitymax. 1.15--
Nominal Service Temperature (intermittent exposure)max. 360°F-
Tensile Strength (at 77°F, standard cure 14 days)min. 200psi-
Ultimate Elongationmin. 250%MIL-PRF-81733
Non-Volatile Contentmin. 96%-
Uncured Properties
ValueUnitsTest Method / Conditions
Mix Ratio (by weight)100:12--
Mix Ratio (by volume)100:7.9--
Viscosity (mixed)10,000 - 15,000poise-

Regulatory & Compliance

Packaging & Availability

Regional Availability
  • Asia Pacific
  • North America

Storage & Handling

Shelf Life
9 months (below 80°F), 30 days (below -40°F)
Storage Information

The shelf life of WS-8072 Class B is 9 months from the date of packaging when stored below 80°F (27°C) in the original unopened container.

The storage life of premixed and frozen material (PMF) is a minimum of 30 days at temperatures below -40°F (-40°C).).