Technical Specification · Free Download

Polyurea Spray-On Bedliner Coating Technical Material Specification

Complete technical specification for polyurea spray-on bedliner coating, including chemical properties, application parameters, Canadian supply chain considerations, and quality control standards for industrial fabrication and woodworking operations.

Material Overview & Common Uses

Polyurea spray-on bedliner coating is a high-performance, two-component elastomeric coating system that cures rapidly upon application. It is widely used in the Canadian automotive aftermarket, industrial flooring, marine, and heavy equipment sectors. The material provides exceptional abrasion resistance, chemical resistance, and UV stability. Common applications include pickup truck bed liners, trailer decks, industrial containment areas, and protective coatings for metal and concrete surfaces. In Canadian fabrication shops, polyurea is often applied over steel, aluminum, and wood substrates to provide a durable, non-slip surface that withstands extreme temperature fluctuations and road salt exposure.

Core Technical Properties & Sizing

Property	Value / Specification
Chemical Composition	Two-component polyurea (isocyanate + amine resin) – 100% solids, zero VOCs.
Cure Time	Tack-free in 10–30 seconds at 70°F (21°C); full cure in 24 hours.
Hardness	Shore D 50–60 (typical for bedliner formulations).
Tensile Strength	2,500–3,500 psi (ASTM D412).
Elongation	300–500% (ASTM D412).
Tear Resistance	400–600 pli (ASTM D624).
Abrasion Resistance	Taber abrasion (CS-17 wheel, 1,000 g load) < 50 mg loss per 1,000 cycles.
Impact Resistance	Direct impact > 160 in-lb (ASTM D2794).
Temperature Range	-40°F to +200°F (-40°C to +93°C) continuous service.
Chemical Resistance	Excellent against gasoline, diesel, hydraulic fluids, salt water, and dilute acids.
UV Stability	Formulated with UV stabilizers; minimal yellowing after 2,000 hours QUV (ASTM G154).
Application Thickness	Typically 60–80 mils (1.5–2.0 mm) per coat; total system 120–200 mils (3–5 mm).
Coverage	1 gallon covers approximately 40–50 ft² at 60 mils (1.5 mm) DFT.
Packaging	Available in 5-gallon pails, 55-gallon drums, and 275-gallon totes. Common Canadian suppliers: Rhino Linings, Line-X, VersaFlex, and local distributors like Canadian Polyurea Systems.
Shelf Life	6 months from date of manufacture when stored at 50–80°F (10–27°C) in sealed containers.
Mixing Ratio	1:1 by volume (A-side: isocyanate, B-side: amine resin).
Pot Life	N/A (plural-component spray equipment required; material cures too fast for hand mixing).

Machinability, Tooling & Feeds

Parameter	Specification / Recommendation
Equipment	Graco Reactor E-20 or similar, with heated hoses (150–180°F / 65–82°C) and a spray gun (e.g., Graco Fusion AP).
Pressure	2,000–2,500 psi at the gun.
Substrate Preparation (Steel)	Abrasive blasting to SSPC-SP10 (near-white metal) with a 2–4 mil anchor profile.
Substrate Preparation (Aluminum)	Chemical etching or mechanical abrasion.
Substrate Preparation (Wood)	Ensure moisture content < 12% and apply a compatible primer.
Temperature Constraints	Substrate temperature must be at least 5°F above the dew point. Ambient temperature 60–90°F (15–32°C).
Application Technique	Apply in multiple passes to achieve total thickness, with a 50% overlap. Maintain a consistent distance of 18–24 inches from the substrate.
Post-Cure	Allow 24 hours before heavy service. Accelerated cure can be achieved with infrared lamps (150°F surface temp for 2 hours).
Defect Repair	Small pinholes or runs can be sanded with 80-grit sandpaper and recoated. Large delaminations require removal and reapplication.

Common Defects & Quality Control

Defect / Issue	Cause	Quality Control Method
Pinholes / Blisters	Moisture in the substrate or air entrapment.	Use a dew point meter; apply a thin tack coat first.
Orange Peel	Uneven surface texture due to improper gun distance or viscosity.	Adjust gun distance (18–24 in) and maintain consistent speed.
Delamination	Poor adhesion due to inadequate surface preparation.	Perform a pull-off adhesion test (ASTM D4541) – minimum 500 psi.
Fish Eyes	Contamination from silicone or oil.	Clean substrate with solvent (e.g., acetone) and use clean air supply.
Soft or Tacky Cure	Incorrect mix ratio or temperature.	Verify A/B ratio with a ratio check kit; ensure material temperature is within spec.
Color Variation	Inconsistent mixing or UV exposure.	Use a single batch for large areas; store material in UV-protected containers.
Runs / Sags	Excessive thickness in one pass.	Apply multiple thin passes (20–30 mils each) rather than one thick coat.

Storage, Handling & Racking Guidelines

Guideline	Specification
Storage Temperature	Store A-side (isocyanate) and B-side (amine) at 50–80°F (10–27°C). Do not freeze.
Humidity Control	Keep containers sealed to prevent moisture ingress. Use desiccant dryers on storage tanks.
Shelf Life & Rotation	6 months from manufacture. Rotate stock (FIFO).
PPE Requirements	Use nitrile gloves, safety glasses, chemical-resistant suit. Supplied-air respirator for application.
Racking Guidelines	Store drums on pallets in a dry, well-ventilated area. Do not stack more than two drums high. Keep away from heat sources.
Spill Containment	Secondary containment for drums. Spill kit with absorbent pads and isocyanate decontaminant.
Disposal	Cured polyurea is non-hazardous. Uncured material as hazardous waste per local regulations (e.g., Ontario Regulation 347).
Canadian Compliance	Transport Canada TDG classification for isocyanate (UN 2206, Class 6.1). Ensure SDS is available.