The 7 Best etch Filler primers (2023 reviews)

We consider a etch filler primer to be a worthy investment in the long run. We are here to help you choose the right one for your purposes from all the best available products in market today.

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Our Top Picks:

Best Overall: Buy: UPOL etch Filler Primer READ REVIEW

Best For plastic bumper: Buy: Raptor etch Filler Primer READ REVIEW

Best For Aluminum patio furniture: Buy: SEM etch Primer READ REVIEW

Best For both header: Buy: SEM etch Filler Primer READ REVIEW

Best For engine Paint: Buy: UPOL etching Primer READ REVIEW

Best For Automotive vehicles: Buy: Custom shop etch Filler Primer READ REVIEW

Best For Body Filler: Buy: Custom shop Ideal Primer READ REVIEW

Best Overall: UPOL etch Filler Primer

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The features department is where upol etch filler primer truly manages to shine. You'll need this if you're doing a DIY bed liner. It works well in covering bare metal in one coat. The product is intended to be sprayed over exposed metal or very light surface rust. It will burn your sinuses horribly with even a small amount of it.

The spray nozzle covers a good amount of area. This is meant to assist with adhesion in areas where access for cleaning and sanding is less than favorable. It is great for spot or panel repairs.

• A must have for berliner applications
• Sanding and cleaning is the most important for raptor adhesion
• New and hot release

Best For plastic bumper: Raptor etch Filler Primer

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Next on the list, we've got yet another primer that manages to win our hearts. It's the raptor etch filler primer and it's widely considered as primer that has the most suitable features. Phosphoric acid ester formula promotes paint adhesion to difficult substrates, like galvanized steel and aluminum. It can be used on bare metal to prep for bed liner. It is ideal for rub through the primer prior to application of color and new bare metal panels. It can be used after electroplating as long as the item is kept clean from grease, dirt or any other environmental damage.

The primer is great to hit bare spots of metal, drys smooth and is a definite purchase along with the raptor liner kit. It offers a large fan pattern and excellent coverage.

• Highly recommended for any bare-metal application
• Creates an anti-corrosive barrier that prevents steel from rusting
• Keep away from heat, hot surfaces, sparks, open flames and other ignition sources

Best For Aluminum patio furniture: SEM etch Primer

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We would, of course, be remiss if we didn't mention sem etch primer for daily purpose. This is an excellent self-etching primer. It is coated with two coats of Valspar tractor/implement paint. It is used to refinish some wheels and provides a good base coat for paint. It is mainly for bare metal. It has the harshest conditions, bonds to the metal well, and leaves a nice, durable, matte gray finish. It will tell you the temperature range. It is impossible to scratch it off with a fingernail or to have it lift off after peeling away masking tape. It is great for aluminum patio furniture.

• Allows the topcoat to level and flow to bring out the gloss
• Simple and no hassles, unlike two-part systems
• Far superior to any rustoleum product for metal

Best For both header: SEM etch Filler Primer

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If you often find yourself scrambling for convenient and suitable primer, sem etch filler primer should be your first option for buying. This self-etching primer requires a top coat. It is a first-step coating that provides excellent adhesion to bare substrates. It has a fine spray that goes on far more evenly than most rattle can paints. It has to be liquid to etch the surface. It lays flat, sprays evenly and will make the top coat application a breeze. It's also a good sealer base to spray a sandable filler primer under.

It is made for perfect preparation for paint. The primer will be durable and hold up for the long haul.

• Takes a lot to cover a surface adequately
• Clean flow, very good coverage, and made for perfect preparation for paint
• Great product, sticks to everything especially skin

Best For engine Paint: UPOL etching Primer

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Best part: upol etching primer costs comparatively low and it is available to ship in 24 hours. This etch primer works very well as a base for raptor liner spray. It is perfectly, great stuff plus works well on bare aluminum. The bond between the etching primer and metal is much better/stronger than the bond between metal and primer surfacer, or between metal and paint. It is only used over bare metal (which usually surrounds body filler, after repair is completed), so it's okay to spray over body filler where there is exposed metal surrounding the body filler.

This material is considered a thin material and the smaller tip works well with the 1.4 mm tip. It comes ready to spray. There is no need to use over only body filter, as urethane primer surfacer/filler adheres very well to sanded body filler without any type of adhesion promoter.

• Rust, no raptor liner flaking, great product
• Great product for aluminum jon boats
• Prevention from bedliner material adhesion for aluminum
• A must have sealer to spray down before bedlining

Best For Automotive vehicles: Custom shop etch Filler Primer

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Compared with other primer in this category, the custom shop etch filler primer has a convenient design. The High Build 2.1 VOC Acrylic Lacquer Primer Surfacer is a premium, lead-free primer surfacer that provides outstanding build for fast filling without shrinkage when used as directed. It provides excellent adhesion over properly prepared substrates. It can be easily sanded, wet or dry, to a fine feather-edge and offers excellent adhesion and color holdout. It will work to make sure it dries thoroughly. It is ideal primer for automotive vehicles, fleet, industrial products, and oem manufacturers.

• Delivers what they promise
• New and hot release

Best For Body Filler: Custom shop Ideal Primer

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The custom shop ideal primer should be able to handle its purpose and duties with ease. The High Build 2.1 VOC Acrylic Lacquer Primer Surfacer is a premium, lead-free primer surfacer that provides outstanding build for fast filling without shrinkage when used as directed. It provides excellent adhesion over properly prepared substrates. It can be easily sanded, wet or dry, to a fine feather-edge and offers excellent adhesion and color holdout. It is ideal primer for automotive vehicles, fleet, industrial products, and oem manufacturers.

• Lot of satisfied buyers
• Good investment for long term