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K5™ is an ultra high-strength, high-elongation 100% pure polyurea, originally developed as a resilient blast resistantpolymer. Soon after, it was discovered that K5™ is exceptionally resistant to abrasion, compared to other spray appliedcoatings. K5™ can be sprayed on to virtually any surface configuration, at any thickness. Therefore, it can be selectivelyapplied to high wear areas.

Product Type: Coating

Features: Abrasion Resistant, High Elongation, High Strength, Low Temperature Flexibility

Application Method: Spray

Chemical Family: Polyureas

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Product Type

Features & Benefits

FEATURES
  • Self-priming on most substrates.
  • Impact absorbing properties.
  • Sound dampening noise control properties.
  • Low temperature flexibility.
  • Seamless, monolithic application.
  • Light-weight.
  • Compliant with FDA/USDA for incidental food contact.

Applications & Uses

Application Method
RECOMMENDED USES

Abrasion resistant liner for:

  • Chutes and hoppers
  • Silos
  • Screw conveyors
  • Aquatic animal, water ride basins
  • Slurry tanks and pipelines
  • Truck liners
  • Cyclones
  • Classifier and shaker screens
  • Aquatic animal habitats and water ride basins
  • Protective coating for trailers, dump trucks, and heavy equipment

Use K5™ with or without broadcast aggregate to provide tough durable flooring system.

MIXING & THINNING

Thoroughly agitate the “B” components of this product priorto application. Use a SPI folding blade mixer, or equivalent equipment approved by SPI. Install mixer through the extra air specific 2” bung hole provided on all “B” drums. Care must be taken not to cross contaminate the individual components with the mixing equipment; for the best mixing results, supply theSPI mixer with 25 cfm of air at 100 psi. Thinning is not required. Using any thinner may adversely affect product performance.

GENERAL APPLICATION INSTRUCTIONS

Apply K5™ only to clean, dry, soundsurfaces free of loose particles or other foreign matter. K5™ can be sprayed over a broad range ofambient and substrate temperatures. It is recommended that K5™ be sprayed in multi-directional(north/south-east/west) passes to ensure uniform thickness.

OTHER COMMON SUBSTRATES:
STEEL: 4-5 mil anchor profile is best for maximum adhesion and varies per application and conditions; adhere to proper SSPC standards. 
WOOD: Apply polyurea onto a clean, dry, and sanded surface;free from burrs, splinters and loose debris. (It is recommendedto prime wood and other porous surfaces before application ofheated, fast-set polyureas to reduce pin holing).
CONCRETE: Prepare concrete in accordance with SPI Concrete Prep Guide and SSPC/NACE Standards. 
PREVIOUSLY APPLIED COATINGS: SPI recommends UB™(ULTRA BOND™) products over existing coatings that are past the recoat window and/or application over other coatings.The use of SPI Prep Wipe™ solution will tack up the existing polyurea coating and can help promote bonding of the K5™. Contact SPI for additional information.
On all above listed substrates and others, please contact SPISales or Technical Support for more information specific toyour application, including industry standards such as SSPC and NACE. Adhesion tests are always recommended priorto application.

Properties

Wet Properties
ValueUnitsTest Method / Conditions
Solids by Volume100%
Solids by Weight100%
Volatile Organic Compounds (0 g/l)0lbs./gal.
Theoretical Coverage DFT (16 mils/gal)100sq. ft.
Weight per gallon (approx.)8.9 (4.05)lbs. (kg)
Number of Coats1 - 3
Mix Ratio1 “A” : 1 “B”
ViscosityA: 1400 ± 100 (B: 200 ± 50)cPs

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

DRY PROPERTIES
 @ 34 mils (0.8 mm) 
 Tensile Strength ASTM D638    ± 4,111 psi (28.34 MPa) 
 Elongation ASTM D638   ± 287% 
 Hardness (Shore A) ASTM D2240  96 ± 5 
 Hardness (Shore D) ASTM D2240   57 ± 5  
100% Modulus ASTM D412   1,800 psi (12 MPa) ± 5% 
 200% Modulus ASTM D412   3,000 psi (21 MPa) ± 5% 
 300 % Modulus ASTM D412   4,700 psi (32 MPa) ± 5% 
 Tear Resistance ASTM D624   690 PLI (91 KN/m) ± 50     
 Exposure Temperature**   -40° - +200F° ((-40° - +93°C))

 

CURING SCHEDULE 
 Gel   ± 9 sec 
 Tack Free   ± 22 sec 
 Post Cure*** 

 24 hours 

 Recoat   2 min - 12 hours 

* All cured film properties are approximate since processing parameters, ad-mixture types, and quantities change physical properties of the cured elastomer. Elevated temperatures will accelerate the curing process and shorten the re-coat window.
** Test performed in a dry, static environment.
*** Complete polymerization to achieve final strength can take up to several days or weeks, depending on a variety of conditions or product type. All samples for above tests were force cured 48 hours or aged for more than three weeks. It is recommended that the user perform their own independent testing.
The samples for tests were sprayed with Graco HXP3 @ 2500 psi dynamic (17 mpa). Primaries/Hose Heat 170°F (77°C,) MP Fusion gun with 29/29 mixing chamber with .040 ceramtip. Test results from SPI.

RECOMMENDED EQUIPMENT SETTINGS
 MACHINES: 
 GRACO
 (Gusmer, Glasscraft) 
 A-25* 
 A-XP1 
 E-10 HP 
 E-20* 
 E-30* 
 E-XP1 
 E-XP2 
 H-20/35 Pro 
 H-50* 
 HV-20/35 
 H-XP2 
 H-XP3 
 Reactor2 E-XP2 
 Reactor2 H-XP2 
 Reactor2 H-XP3 
 PMC   PAX-25 
 PH-2 
  PHX-25 
 PHX-40 

 

 GUNS: 
 GRACO 
 (Gusmer, Glasscraft) 
 Fusion AP 
 Fusion MP 
 GAP Pro 
 GX7-DI 
 GX-8 Pro 
 GX7-400 
 P2 
 P2 Elite 
 P2 Elite “C” 
 D7 
 PMC   AP-2 
 SPRAY FOAM
 EQUIP & MFG 
 Boss 

 

  • Standard 1:1 ratio, heated, plural-component equipment developing a minimum of 2000 psi (10.4 MPa) dynamic pressure at the gun with heating capabilities to 170°F(77°C) will adequately spray HARD CAP™ 100.
  • Machines capable of producing a higher dynamic psimay be required depending on the service environment the HARD CAP™ 100 will be exposed to.
  • Proportioning machine primary heater temperature 160-170°F (71-77°C).
  • Hose temperature 160-170°F (71-76°C). A hose thermometer inserted under the insulation near the gun should read a minimum of 145-155°F (63-68°C).
  • Physical properties will be enhanced when sprayed at higher pressure (3000 psi or more); and utilizing an impingement mix gun such as MP Fusion or GX7-DI gun.
  • Do not use mixing chambers with output greater than 1.5 gallons per minute.
LIMITATIONS
  • K5™  is for professional use only.
  • User must be proficient in the application of K5™ 100 and the use of the high pressure heated plural component equipment used to apply it.
  • K5™ must be stored at temperatures between 60—90°F (15—32°C).
  • Liquid temperature in containers/drums during application 70—100°F (21—38°C).
  • Apply K5™ when surface and air temperatures are above 40°F (5°C) and the surface temperature is at least 5°F (3°C) above dew point and rising.
  • Avoid moisture contamination in containers. Containers should not be resealed if contamination is suspected.CO2 created pressure can develop. Do not attempt to use contaminated material.
  • Undried air exposed to liquid components will reduce physical properties of the cured coating.

Note: The material supplied is a two component system(component “A”/component “B”, which is used to formulatethis product. The quality and characteristics of the finished polymer is determined by the mixture and application of thetwo components by the person applying the polymers.

TEST INFORMATION
 ABRASION RESISTANCE ASTM D4060 1000 g - 10,000 cycles    H-18 wheel   33 mg loss 
 CS-17 wheel   0.2 mg loss 
 Mandrel Bend Test ASTM D522-93a   Passed   Mandrel Size 1” Test Temp -60°F (-51°C) 

 

Packaging & Availability

Packaging Type
COLORS

K5™ is available in SPI standard colors (Sand, MediumGrey, and Black).

Note: In continuous full-light exposure white or very lightcolors will yellow over a period of time. K5™ is availablein a high-pigment, UV inhibited formulation for stand-aloneapplications, such as roofs and containment liners. Aliphaticurethane and other suitable topcoats can be used wherelong-term color stability and increased longevity in full sunexposure are of critical importance.

PACKAGING

This product sold in standard 110 gallon drum and 550 gallon tote sets. Available in other container sizes, Non-standard containers may require a longer lead time.

Storage & Handling

Shelf Life
6 Months