What's the difference between this product and sem self-etching primer?

The high build primer is used under the top coat, to fill any scratches or minor imperfections while finish sanding, and self-etching is used only on bare metal, under any body filler, or other primer.

Does this stick to silicone?

NOTHING sticks to silicone...or...nylon.

How well will this adhere to existing finishes? I have some bare metal and some areas of existing paint and other primer.

As long as you sand the paint and medal with at least 220 grit sand paper fine. I have been using it on fiberglass/paint. It will show you the high spots and lows. You could also use a contrast material to make sanding easier to get your smooth finished product. Hope this helps.

How long does it have to dry before recoating?

It is mainly depending on environmental temperture. Watch the first coat, when it flashes, it is ready for the next coat. A little extra wait wont hurt.

Sem 42013 Grey High Build Acrylic Primer 16 Oz

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€ 69.80

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚗 Prime Like a Pro, Finish Like a Boss!

TRUSTED BY PROS - Ranked #30 in Automotive Primers with 4.5-star reviews—join the elite who demand quality.
SANDING MADE SIMPLE - Easy to sand between coats, allowing perfect layering and flawless topcoat adhesion.
EFFORTLESS APPLICATION - Precision spray nozzle delivers an even, splatter-free coat for professional results.
UNIVERSAL COMPATIBILITY - Works seamlessly on metal, aluminum, urethane, and plastics—one primer to rule them all.
FLAWLESS SURFACE EVERY TIME - Elastomeric acrylic primer fills dents and chips with ease for a showroom finish.

The SEM 42013 Grey High Build Acrylic Primer is a 16 oz. elastomeric acrylic coating designed for automotive use. It provides superior adhesion and excellent filling properties on multiple substrates including metal, aluminum, urethane, and plastics. Featuring a smooth, splatter-free spray pattern and easy sanding, it ensures a flawless base for topcoats. Highly rated and trusted by professionals, this primer is your go-to for restoring and perfecting automotive surfaces.

Specifications

ASIN	B000PKX16A
Age Range Description	Adult
Best Sellers Rank	#47,283 in Automotive ( See Top 100 in Automotive ) #34 in Automotive Primers
Brand	SEM
Brand Name	SEM
Color	Grey
Color Code	#808080
Container Type	Bottle
Coverage	Full
Customer Reviews	4.5 out of 5 stars 336 Reviews
Finish Type	Matte
Global Trade Identification Number	00646786420139
Indoor Outdoor Usage	Indoor
Is Waterproof	False
Item Form	Liquid
Item Volume	16 Fluid Ounces
Item Weight	1 Pounds
Manufacturer	SEM
Model Name	42013
Model Number	42013
Paint Type	Acrylic
Part Number	42013
Size	16 Ounce (Pack of 1)
Special Feature	Provides superior adhesionExcellent filling propertiesWorks on multiple substrates, including metal and plasticEasy to sandTopcoat with most refinish material Specifications Special Feature Provides superior adhesionExcellent filling propertiesWorks on multiple substrates, including metal and plasticEasy to sandTopcoat with most refinish material Specifications See more
Special Features	Provides superior adhesionExcellent filling propertiesWorks on multiple substrates, including metal and plasticEasy to sandTopcoat with most refinish material Specifications
Specific Uses For Product	Automotive
Surface Recommendation	Aluminum,Metal,Plastic
UPC	646786420139
Unit Count	16.0 Ounce
Water Resistance Level	Water Resistant

Reviews

A**R

25.05.2022

A**R

29.09.2025

P**W

11.04.2026

J**R

10.03.2026

J**.

23.05.2018

K**E

22.01.2024

J**Y

18.01.2017

R**Y

9.08.2025

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