HydroArmor® 8800BL is a sprayable water-based coating designed to quickly build a high level of water resistance. It is formulated to provide excellent adhesion to stainless steel, wood, and composite decking and to provide very good corrosion protection when applied with a wet film thickness as low as 0.020". This coating can be easily sprayed onto exposed underbody areas, and wet film builds of 0.040" can be applied without runs, drips, or sags.

Product TypeLatex, Waterborne Coating

Application AreaBus, Recreational Vehicles, Transportation Seal, Truck

Compatible Substrates & SurfacesAluminum, Composites, Fiberglass, Galvanized Steel, Metal, Stainless Steel, Wood

FeaturesCorrosion Resistant, Cost Effective, Easy To Clean, Good Sagging Resistance, Good Weather Stability, High Efficiency, Highly Flexible, Long Shelf Life, Reduces Carbon Footprint, Superior Aesthetics, Water Resistant

Chemical FamilyAcrylics & Acrylates

Technical Data Sheet

Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Product Features & Benefits
  • One component material for easy handling
  • Safe and easy to use
  • High bond strength on a variety of substrates
  • Suitable for easy application via brush, roll or spray
  • Environmental and safety friendly, VOC compliant
  • Withstands long exposures to humidity, heat, and salt spray
  • Resistant to impact even at low temperatures
  • Superior protection from rust and corrosion
  • Low density formula provides good protection with minimal added weight
  • Excellent adhesion to stainless steel, wood, and composite decking and to provide very good corrosion protection
  • Easily sprayed onto overhead and vertical surfaces to seal joints
Product Highlights
  • HydroArmor® 8800BL is an extremely durable anti-corrosion coating even when exposed to demanding service conditions:
  1. Several days at 121°C (250°F) and 38°C/100% relative humidity does not affect the dried film.
  2. When test panels were subjected the “Gravelometer” at -30°C (-22°F), the rocks did not penetrate the coating.
  3. After 1,000 hours in the salt spray cabinet, the HydroArmor® coating remains intact, and there is no corrosion under the coating.
  • HydroArmor® 8800BL is as safe to use and as easy to clean up as water-based house paint.
  • It provides as good as or better anticorrosion protection than any of the competitive products on the market without the environmental and safety problems inherent in many of the undercoating products available today.

Applications & Uses


Drying Profile

  • Dry at ambient conditions above 55°F. 
  • HydroArmor® dries quickly at ambient temperatures and can typically be handled within 30 minutes of application.
  • If the coating is not baked, it will completely dry in 24 hours or less. Drying is slowed by high humidity and poor air circulation.
Factor Shorter Time to Dry Longer Time to Dry
Coating Thickness Thinner Coating Thicker Coating
Air Flow More Air Flow Less Air Flow
Temperature Hotter Temperatures Colder Temperatures
Humidity Less Humidity More Humidity

Application Instructions

  • As with any coating the surface to be coated should be clean and dry prior to application of the HydroArmor® 8800BL.
  • We recommend that a minimum coating thickness of 0.020” be applied for optimum performance.
  • Product can be brushed, rolled or sprayed onto surface.


  • HydroArmor® can be cleaned from the equipment and overspray with water while wet. Dried material can be removed with Methyl Ethyl Ketone.


Typical Properties
ValueUnitsTest Method / Conditions
VOC Content20 - 25g/LCalculated
Service Temperature- 29 - 120°C
Wet Film Properties
ValueUnitsTest Method / Conditions
Viscosity (Brookfield RV, spindle 5, 2.5 rpm)30,000 - 40,000cP
Viscosity (Brookfield RV, spindle 5, 20 rpm)5,000 - 12,000cP
Weight Solids55 - 60%
Volume Solids70 - 75%ASTM C681
Specific Gravity1.0 - 1.1
pH7.5 - 8.0
Sag (at wet film thicknesses of 0.040" or Less)None

Technical Details & Test Data

Test Data

Test panels were coated at 0.030" wet film thickness and allowed to dry 48 hours at room temperature

Dry Film Properties Typical Result Test Method
-30°C Gravelometer 10 (0 Chips) ASTM D 3170-03
Water Resistance No blistering, loss of adhesion, or significant softening of coating 24-hour water soak
Temperature Resistance Passes - No cracks, chalking, or loss of adhesion 1,000 hours at 185°F
Salt Spray Resistance No corrosion or loss of adhesion 1,000 hours - ASTM B117
Humidity Resistance No loss of adhesion
No corrosion or blistering
1000 hours at
38°C and >95%RH
HydroArmor® Highlights

H.B. Fuller is dedicated to commercial-scale production of bonding and sealing products that help you improve quality, reduce vehicle weight, and lower your carbon footprint with greater efficiency and lower production costs.

There are many advantages to using HydroArmor® undercarriage coatings that include:

  • Easy cleanup
  • Water-based formula
  • Water, weather, and corrosion resistance
  • Highly flexible
  • Aesthetically pleasing appearance
  • VOC compliance

Packaging & Availability

Regional Availability
  • Africa
  • Asia Pacific (Excluding Russia)
  • Europe (Excluding Russia)
  • India
  • Latin America
  • Middle East
  • North America

Storage & Handling

Shelf Life
6 Months
Storage Conditions

Store material in original unopened packaging at temperatures between 4°C and 32°C (40°F and 90°F).