3M 05821

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Description for 3M 05821

Designed to be used as a "skin coat" to fill minor imperfections in properly prepared body filler, steel, aluminum, SMC, fiberglass and OEM paint.

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Application Type	Finishing
1 Part or 2 Part	1-Part
Material Form	Putty
Substrate	aluminium, Fiberglass, steel
Manufacturer	3M
Chemistry	Polyester resin with styrene monomer, Benzoyl peroxide
Cure Method	Room temperature cure
Cure Time (min)	15
Viscosity (cPs)	17,600 to 25,600
Color	Blue, Tan, Beige
Stain Resistance	Stain resistance
High Temperature Resistance (°C)	82
Low Temperature Resistance (°C)	-29

Best Practices for 3M 05821

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Technical Data for 3M 05821

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Overview

Application Type
- Coating - Finishing
1 Part or 2 Part
- 1-Part
Material Form
- Putty
Substrate
- Fiberglass
- Aluminum - aluminium
- Steel
- Other - SMC, OEM paint.
Industry
- Other - Filling of pinholes, minor dents, gouges, scratches, and stone chips in properly prepared body filler
Chemistry
- Other - Polyester resin with styrene monomer, Benzoyl peroxide
Cure Method
- Room Temperature / Air Dry - Room temperature cure
Color
- Blue
- Brown - Tan, Beige

Specifications

Cure Specs

Cure Time (min)	15
Viscosity (cPs)	17,600 to 25,600	Test Method
Linear Shrinkage (%)	<1.00

Bond Strength

Shear Strength (psi)	1,950 to 2,150, 640 to 840	Test Method
Tensile Strength (psi)	1,950 to 2,150	Test Method

Material Resistance

Stain Resistance	Stain resistance
High Temperature Resistance (°C)	82
Low Temperature Resistance (°C)	-29

Conductivity

Filler	Steel, Aluminum, SMC, Fiberglass, OEM paint

Hardness

Shore D Hardness	31 to 39, 40 to 50, 43 to 53, 45 to 55, 50 to 60	Test Method

Other Properties

Flash Point (°F)	89.0	Test Method

Business Information

Shelf Life Details	Store in a dry area at 72 deg F for optimal shelf life.
Shelf Life Temperature (°F)	72
Shelf Life (mon)	Optimal

Best Practices for 3M 05821

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1. Application
  
  Sand properly cleaned surfaces with grade 80 - 180 abrasive, (Putty will adhere to sand scratches as fine as 320) Blow off with clean compressed air to remove all sanding dust.
  
  Mix applicable amount of putty with 2% hardener by weight (or one stripe across a 4" puddle of putty).
  
  Mix to a uniform color on a clean non porous surface spreading thin and pressing air bubbles out as you mix.
  
  Apply a "tight" coat pressing putty into defect areas and recoat if needed building slightly higher than the surrounding area.
  
  Allow 15 minutes cure time and sand with 150-320 grit abrasive to desired shape. For best results the finish sanded material should not exceed 1/16 inch.
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