Mike's Product Review:

Magnum Undercoating Gun

Feb. 20, 2020

If you plan on keeping a vehicle for 5 or more years in Newfoundland you really need to invest in a regular schedule of vehicle rust proofing from year one. I've been growing ever tired of spending upwards of $300 per year to have 2 vehicles undercoated with products that are watery oil based. They work great inside door panels and crevices but wash off the under side of the vehicle very quick once winter hits.



This year I caved and picked up my own pro series undercoating gun from Automotive Supplies. There are lots of options on the market for these tools, I liked how this one has the undercoating wand separate from the canister to allow for tricky manoeuvres of the wand without fear of running short of product esp working upside down.



The wand has a quick change tip to swap from a straight wand to a bent wand on even slimmer hose to a 360 degree flexible hose for undercoating inside surfaces of doors and rocker panels. The canister has its own easily adjustable air pressure regulator and an oil/product adjustment valve to control output, especially important when switching from a watery product for inside doors to a thicker product for underside/chassis.



Since both my vehicles were already previously coated by a local shop they already had the necessary holes and plastic plugs installed. If its your first time this information can be Googled online. I also removed tail lights, headlights, grill and more to access as much of the vehicle as possible for an extra thorough undercoating job.



The products I chose were based on what has been previously used on my vehicles. I chose red rust check for spraining inside the doors, rockers, tailgate, etc.



I picked up this kick ass 5 gallon bucket of ProForm oil based undercoating from Car Quest which has the consistency of Mayonnaise or Pudding. It does not trap moisture and never fully dries like their Wax based product that will cause more trouble than it solves.

If I were doing a new vehicle from scratch I would probably pick up a gallon can of Fluid Film for inside the doors, around electrical, and rubber seals. It's a fantastic wax based product that does not affect rubber or plastic and also doesn't dry.

I also recommend the ProForm oil based product for the underside, chassis etc as it works well, bonds well, and withstands washing off better than any product I've tried previously. It's available in Amber or Black, I chose the latter as it makes the chassis look fantastic!

Purchasing the equipment and undercoating product at shop rates cost about the same as one season of professional undercoating and I have enough product to coat my 2 vehicles for about 3 years. Easy investment if you don't mind a little time and getting dirty.

Cheers, Mike

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Copyright 2011 Michael Smith