WS-8020RC Class B is a rapid cure two component polysulfide sealant. The cured sealant has excellent fuel resistance as well as outstanding sealing characteristics at temperatures ranging from -65°F (54°C) to 250°F (121°C), including intermittent exposure up to 360°F (182°C). It exhibits excellent elastomeric properties and retention after prolonged exposure to jet fuel and aviation gasoline. The uncured product is a low sag, thixotropic paste suitable for application by extrusion gun or spatula. It cures at room temperature forming a resilient rubber, exhibiting outstanding sealing.

 

Chemical Family: Polysulfides

Application Method: Extrusion, Spatula

Compatible Substrates & Surfaces: Coated Surfaces, Composites, Metal

Features: Excellent Fuel Resistance, Excellent Productivity, Fast Curing, Gasoline Resistant, General Purpose, Good Adhesion, Good Weather Stability, Low Sagging, Oil Resistant, Room Temperature Curing, Thixotropic

Technical Data Sheet
  • TypeDocument Name
View All Documents

Enhanced TDS

Identification & Functionality

Features & Benefits

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

This product has the following features and Benefits

  • Fast curing system significantly increasing productivity
  • Excellent thermal performance
  • Excellent elastomeric properties and strength retention after prolonged exposure to jet fuel, aviation gasoline, hydraulic fluids, oils and lubricant
  • Less than 1% linear shrinkage
  • Low VOC, eco-friendly sealant which reduces hazardous impact during installation
  • Outstanding adhesion to multiple metals, composites, primers and coatings used in modern aircraft

Applications & Uses

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

Clean the surface of substrates with appropriated cleaning solutions per specification(s) using an OEM approved lintfree cloth to remove, dirt, grease and processing oils just before the application of sealant. Pour solvent onto cloth to avoid contamination of solvent supply. Clean in small areas at a time. Wipe immediately after application to prevent redeposition of contaminants on the surface. Repeat at least three times or more if required. Use 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 sealant to get consistency.

Properties

Physical Form
Component A
ValueUnitsTest Method / Conditions
Viscosity (base, cured)10,000 - 14,000poise-
Typical Properties
ValueUnitsTest Method / Conditions
Storage Temperaturemax. 27°C-
Peel Strength (100% cohesive failure, AMS 4901 (Titanium), AMS 2629, Test method type 1)40pli-
Peel Strength (100% cohesive failure, AMS 4901 (Titanium), AMS 2629, tool side, Test method type 1/3%SW)40pli-
Peel Strength (100% cohesive failure, AMS 5516 (Stainless steel), AMS 2629, Test method type 1)42pli-
Peel Strength (100% cohesive failure, AMS 5516 (Stainless steel), AMS 2629, tool side, Test method type 1/3%SW)42pli-
Peel Strength (100% cohesive failure, MIL-C-27725 (Fuel tank coating), AMS 2629, Test method type 1)42pli-
Peel Strength (100% cohesive failure, MIL-C-27725 (Fuel tank coating, AMS 2629, tool side, Test method type 1/3%SW)43pli-
Peel Strength (100% cohesive failure, AMS 2471 (Anodized aluminum), AMS 2629, tool side, Test method type 1/3%SW)45pli-
Peel Strength (100% cohesive failure, Mil-C-5541(Alodine aluminum), AMS 2629, Test method type 1)45pli-
Peel Strength (100% cohesive failure, Mil-C-5541(Alodine aluminum), AMS 2629, tool side, Test method type 1/3%SW)45pli-
Peel Strength (100% cohesive failure, MIL-C-27725 (Fuel tank coating, AMS 2629, ply side, Test method type 1/3%SW)46pli-
Peel Strength (100% cohesive failure, AMS 2471 (Anodized aluminum), AMS 2629, Test method type 1)48pli-
Peel Strength (100% cohesive failure, IM7/5250-4 (BMI), AMS 2629, Test method type 1)50pli-
Peel Strength (100% cohesive failure, AMS 4901 (Titanium), AMS 2629, ply side, Test method type 1/3%SW)50pli-
Peel Strength (100% cohesive failure, Mil-C-5541(Alodine aluminum), AMS 2629, ply side, Test method type 1/3%SW)50pli-
Peel Strength (100% cohesive failure, AMS 5516 (Stainless steel), AMS 2629, ply side, Test method type 1/3%SW)53pli-
Application Temperature54 - 121°C-
Peel Strength (100% cohesive failure, AS 4/3501-6 (Graphite epoxy), AMS 2629, Test method type 1)55pli-
Peel Strength (100% cohesive failure, MIL-C-23377(Primer coating), AMS 2629, Test method type 1/3%SW)55pli-
Peel Strength (100% cohesive failure, AMS 2471 (Anodized aluminum), AMS 2629, ply side, Test method type 1/3%SW)55pli-
BasePolysulfide--
Component B
ValueUnitsTest Method / Conditions
Viscosity (hardener, cured)max. 2000poise-
Rheological Properties
ValueUnitsTest Method / Conditions
Mix Ratio (by volume, cured)100:10.14--
Mix Ratio (by weight, cured)100:12--
Nominal Service Temperature (continuous, operational range)-54 to 250°F-
Viscosity (cured)11,000 - 14,000poise-
Low Temperature Flexibility (no loss of adhesion or cracking)-65°F-
Ultimate Hardness (cured)52Shore AShore Durometer Scale
Specific Gravity (cured)max. 1.45--
Nominal Service Temperature (intermittent exposure)max. 360°F-
Weight Loss (AMS 2629, Test method type 1)max. 6%-
Swelling (Fuel Swell, AMS 2629, Test method type 1)max. 6.5%-
Ultimate Elongation (at 77°F, standard cure 14 days)min. 300%-
Tensile Strength (at 77°F, standard cure 14 days)min. 350psi-
Non-Volatile Content (cured)min. 97%-

Regulatory & Compliance

Packaging & Availability

Country Availability
Regional Availability
  • Europe
  • India/MiddleEast/Africa (IMEA)

Storage & Handling

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

The shelf life of WS-8020RC Class B is 9 months from the date of manufacturing 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).