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Eastwood Technical Assistance: 800.544.5118  >>  techelp@eastwood.com

To order parts and supplies: 800.345.1178  >>  eastwood.com 

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The 

Eastwood Undercoat Gun

 is an efficient, adjustable design that fits most Eastwood products 

packaged in screw-on cap quart containers. An adjustable nozzle controls material flow to accept a 
wide range of material thickness and textures. May be used with Eastwood Undercoating, Rubberized 
Undercoating, Heavy-Duty Anti-Rust, Internal Frame Coating and spray-on soundproofing products. 
The included accessory flexible plastic wands can be used to apply materials in hard-to-access areas.

SPECIFICATIONS

•  Operating Pressure: 40-60 PSI [2.75-4.13 Bar].
•  Air Supply Requirement: 5-7 CFM [140-200 lm].
•  Air Inlet: 1/4" FNPT.
•  Die-cast aluminum body.
•  Adjustable nozzle for application of various coating viscosities and textures.
•  7" long, aluminum trim-to-fit pick-up tube.
•  32" long, flex hose/wand with 360 degree misting nozzle is for 

applying thinner materials

 

such as rust proofing to hard-to-reach hollow areas.

•  24" long, flex hose/wand with single 1/4" orifice for 

applying thicker materials

 such as under-

coat, bed liner, soundproofing, heat barrier and more to tight spaces and internal areas of frames.

GUN SET-UP

•  For optional Eastwood #16003A, Undercoating Gun Bottle use:
  Prepare coating per label instructions, pour into #16003A bottle  

 

then thread gun into open bottle top. 

 

NOTE:

 The 7" pick-up tube can be used as is.

•  For direct to container use:
  Prepare coating per label instructions; remove threaded cap then  

 

thread gun onto open can top. 

NOTE:

 For some containers such as    

Eastwood #16032ZP or #16017ZP Heavy-Duty Anti-Rust & #16008    
Rubberized Undercoating, the pick-up tube needs to be shortened.

    To do so:
      1.  Place gun along can with underside of cap over upper rim of  

      and mark the pick-up tube at the point where it aligns with    
      the bottom rim of the can 

(FIG. A)

.

      2.  Cut the pick-up tube with a hacksaw on a 45 degree angle  

      with the open side toward the front of the gun 

(FIG. B)

.

      3.  Remove any burrs that remain at the cut line.
•  Connect to regulated, clean and dry air supply.

GUN NOZZLE ADJUSTMENT

The Eastwood #20441 gun features an adjustable nozzle to allow spray-

ing a variety of materials and textures.

  •  To increase material flow for heavier-bodied materials such as    

 

  undercoat, bed liner, soundproofing, heat barrier and more;  

 

 

  loosen brass lock ring, turn the brass nozzle 

outward

  

  (counter-clockwise as viewed from end of gun) then re-tighten    
  lock ring 

(FIG. C)

.

  •  To decrease material flow for thinner-bodied materials such as    

  rust proofing, rust-converter and more; loosen brass lock ring,    
  turn the brass nozzle 

inward

 (clockwise as viewed from end of    

  gun) then re-tighten lock ring 

(FIG. D)

.

ATTACHING ACCESSORY FLEX HOSE/WANDS

  The Eastwood #20441 gun includes 2 different flex hose/wands.
  • The 

32" long

, Eastwood flex hose/wand with 

360 degree  

 

  misting nozzle

 is best for applying thinner materials such as rust  

  proofing in hard-to-reach hollow areas.

  • The 

24" long

, Eastwood flex hose/wand with single 

1/4"

 orifice   

  is great for applying thicker materials such as undercoat,  
  bed liner, soundproofing, heat barrier and more to tight spaces    
  and internal areas of frames.

FIG. B

45° CUT

FRONT 

¢

SAFETY INFORMATION

READ INSTRUCTIONS! 

  Read and understand all instructions thoroughly.

FIRE & EXPLOSION HAZARD! 

   Do Not use near sparks, open flame or other potential ignition source.

HEALTH HAZARD! 

  •  Avoid breathing vapors produced by Spray Gun. Always wear appropriate  
    NIOSH approved breathing apparatus and use in a well ventilated area. 
  •  Wear appropriate eye protection.
  •  Wear solvent-resistant gloves.

FIG. A

FIG. C

INCREASE

FLOW 

¢

FIG. D

DECREASE

FLOW 

¢

FIG.E

32" W/360

 

MISTING  

NOZZLE

24" W/¼" 

ORIFICE

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