H.B. Fuller logo

WS-8020RC Class B

1 of 4 products in this brand

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

Chemical Family
Polysulfides
Product Type
2K (2 component) Sealant,
Sealant
Technologies
Adhesives & Sealants
Product Families
Adhesives & Sealants — Sealing Technology
2K (2 Component) Sealants,
Reactive Sealants

Features & Benefits

Labeling Claims
Environmentally Friendly,
Low VOC
Ready-to-Use Product 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
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
Automotive & Transportation
Applications
Automotive & Transportation — Automotive
Fuel Systems
Automotive & Transportation — Transportation
Aerospace & Aviation
Application Area
Aerospace Applications,
Fuel Tank,
Fuselage
Application Method
Extrusion,
Spatula
Compatible Substrates & Surfaces
Coated Surfaces,
Composites,
Metal
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
Paste
Rheological Properties
ValueUnitsTest Method / Conditions
Viscosity11,000 - 14,000poise-
Specific Gravitymax. 1.45--
Non-Volatile Contentmin. 97%-
Ultimate Hardness (Shore A)52--
Weight Lossmax. 6%AMS2629 Ty1
Fuel Swellmax. 6.5%AMS2629 Ty1
Tensile Strength (standard cure, in 14 days, at 77°F)min. 350psi-
Ultimate Elongation (standard cure, in 14 days, at 77°F)min. 300%-
Service Temperature (continuous, operational range)-54 - 250 °F-
Service Temperature (intermittent exposure)max. 360°F-
Low Temperature Flexibility (no loss of adhesion or cracking)-65°F-

Regulatory & Compliance

OEM Specifications
AMS-3276,
AMS-S-8802,
Cessna CMNP021,
Cessna CMNP093,
FW FMS-1044

Packaging & Availability

Country Availability
India
Regional Availability
  • Africa
  • Europe (Excluding Russia)
  • India
  • Middle East

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).