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Automotive Primers and Undercoats
HMG Uniblok Sealer Aerosol
HMG Uniblok Sealer Aerosol is a 1K air drying sealer / isolator for sealing synthetic enamels against attack when overcoating with stronger solvent systems such as cellulose, 2K finishes etc. For the non-aerosol version of this product please see HMG Uniblok Sealer. 400ml/16oz Aerosol Outstanding sealing properties Suitable for a wide...
HMG Uplas Primer Aerosol
HMG Uplas Primer Aerosol is a matt finish 1K coating specifically designed to promote adhesion to various plastic substrates. For the non-aerosol version of this product please see HMG Uplas Primer. 400ml/16oz Aerosol A 1K coating specifically designed to promote adhesion to various plastic substrates Quick drying - touch dry in 5 mins...
HMG Cellulose APS Primer Aerosol
HMG Cellulose APS Primer Aerosol is a quick drying cellulose primer for use in aerosols, classic car refinish and industrial applications. This product is also available in non-aerosol form, please see HMG Cellulose APS Primer. 400ml/16oz Aerosol Matt finish Available in grey (APS2) or white (APS1) Please note: Not to be used in...
HMG KX Undercoat Aerosol
HMG KX Undercoat Aerosol is a high build Polyurethane Alkyd undercoat that offers excellent wet edge characteristics and superb topcoat holdout. This product has also been designed to be “Ready for Use”, for the non-aerosol version of this product please see HMG KX Undercoat. 400ml/16oz Aerosol Available in packs of 1 or packs of 2-10, 40,...
HMG ST3000 LF 63 Chromate Free 2K Etch Primer
HMG ST3000 LF 63 Chromate Free 2K Etch Primer (Base) is a chromate free transluscent 2K Etch Primer. This product MUST be purchased/used in conjuction with its manufacturer specified base or activator: 2-Pack System Details Base (Part 1) HMG ST3000 LF 63 Chromate Free 2K Etch Primer Activator (Part 2) HMG 2K Etch ST3000...
HMG Chromate Free Etch Primer
HMG Chromate Free Etch Primer is a quick drying chromate free etch primer providing good anti corrosive properties and excellent adhesion to ferrous and non-ferrous metals. This product MUST be purchased/used in conjuction with its manufacturer specified base or activator when used as a wash primer: 2-Pack System Details Base...
HMG Polykote 2K MU Primer
HMG Polykote 2K MU Primer (Base) is a 2K isocyanate cured acrylic polyurethane primer/surfacer offering high film build, excellent adhesion and anti corrosive properties. This product MUST be purchased/used in conjuction with its manufacturer specified base or activator/hardener/thinner: 3-Pack System Details Base (Part 1) HMG...
HMG Polyester Spray Filler KF8
HMG Polyester Spray Filler KF8 is a 2K heavy bodied sprayable filler which can be used for the deep filling of substrates of various types. Two part system - 5L base with 500ml hardener Used extensively in the automotive re-finishing field, where its ultra high build and quick curing make it ideal for use in repair situations Other uses...
HMG Epoxy Primer EPC
HMG Epoxy Primer EPC (Base) is a medium solids epoxy primer. This product MUST be purchased/used in conjuction with its manufacturer specified base or activator/hardener: 2-Pack System Details Base (Part 1) HMG Epoxy Primer EPC Activator (Part 2) HMG Epoxy Hardener EPC 9056 Part one of a two part system....
HMG Epoxy Primer EP2 2K
HMG Epoxy Primer EP2 is a zinc phosphate 2K epoxy primer offering excellent adhesion. Supplied as a 4L two-pack product comprising 3L Base and 1L Hardener. Water and chemical resistant. Medium solids 2K epoxy primer. Good corrosion protection. Suitable for commercial transport, bus, coach and rail applications. Designed to be...
HMG Polykote 2K TAP Primer
HMG Polykote 2K TAP Primer (Base) is a transparent 2K adhesion promoter /primer / sealer. It is designed for use on sound OEM finishes when minimum sanding is required and has the additional benefit of being used as a `wet on wet` primer to optimise process times. This product MUST be purchased/used in conjuction with its manufacturer...
HMG Polykote HS Rapidbuild 2K Primer
HMG Polykote HS Rapidbuild 2K Primer is a high quality 2K isocyanate cured acrylic polyurethane primer/filler. This product MUST be purchased/used in conjuction with its manufacturer specified base or activator/hardener: 2-Pack System Details Base (Part 1) HMG Polykote HS Rapidbuild 2K Primer Hardener (Part 2) HMG...
HMG Polykote 2K AMC Primer
HMG Polykote 2K AMC Primer is a 2K isocyanate cured `wet on wet` acrylic polyurethane primer/surfacer. This product MUST be purchased/used in conjuction with its manufacturer specified base or activator/hardener: 2-Pack System Details Base (Part 1) HMG Polykote 2K AMC Primer Hardener (Part 2) HMG Hardener 9004 Standard...
HMG Uniblok Sealer
HMG Uniblok Sealer is a 1K air drying sealer / isolator for sealing synthetic enamels against attack when overcoating with stronger solvent systems such as cellulose, 2K finishes etc. Outstanding sealing properties Suitable for a wide variety of automotive, industrial & decorative applications Also available as an aerosol, please...
HMG A1242 Undercoat
HMG A1242 Undercoat is a 1K alkyd/polyurethane undercoat with superior brushing qualities and excellent obliteration properties. Suitable for large areas due to its ease of application and long wet edge time.
HMG Synthetic High Opacity Undercoat
HMG Synthetic High Opacity Undercoat is a 1K alkyd/polyurethane undercoat with superior brushing qualities and excellent obliteration properties. Suitable for large areas due to its ease of application and long wet edge time Please note: Colours shown are for illustrative purposes only
HMG KX Undercoat
HMG KX Undercoat is a high build polyurethane alkyd undercoat. Offers excellent wet edge characteristics and superb topcoat holdout Formulated for use under all HMG Synthetic topcoats Available in 5,000+ colours from RAL, NCS, and British Standard Also available as an aerosol, please see HMG KX Undercoat Aerosol Please note: Colours...
HMG Uplas Primer
HMG Uplas Primer is a 1K coating specifically designed to promote adhesion to various plastic substrates. It is quick drying and can be overcoated with a wide variety of HMG systems. A 1K coating specifically designed to promote adhesion to various plastic substrates Quick drying Can by overcoated with a wide variety of HMG systems...
HMG Cellulose APS Primer
HMG Cellulose APS Primer is a quick drying cellulose primer for use in aerosols, classic car refinish and industrial applications. Available in grey or white Also available as an aerosol, please see HMG Cellulose APS Primer Aerosol Order a Colour Sample
HMG Synthetic LP Primer
HMG Synthetic LP Primer is a high build, anti-corrosive, 1K alkyd primer for use under all HMG synthetic topcoats. It combines high build and after a suitable drying period exhibits excellent application and scratch filling properties.
HMG HB05 Primer
HMG HB05 Primer is an alkyd based, high build primer offering outstanding adhesion, moisture resistance and corrosion protection due to incorporation of modified zinc phosphate. Designed for airless or conventional application for structural steelwork, chassis, steel fabrication etc. It is easy to apply without fear of runs or sags at...
HMG Speedbuild 3 Primer
HMG Speedbuild 3 Primer is a 1K, high build, high solids, anti-corrosive primer. This product MUST be purchased/used in conjuction with its manufacturer specified base or activator/hardener/thinner: 2-Pack System Details Base (Part 1) HMG Speedbuild 3 Primer Thinner (Part 2) HMG Thinner 2601 HMG Thinner 2602 HMG...
HMG Synthetic BDX Primer
HMG Synthetic BDX Primer is a high build, anti-corrosive, single pack alkyd primer for use under all HMG synthetic topcoats, combining high build and excellent sandability with outstanding application and scratch filling properties. For use on suitably prepared structural steel, chassis, fabrication and aluminium Can be applied to bare...
HMG A1240 High Opacity White
HMG A1240 High Opacity White is a high quality brushing enamel that gives excellent obliteration of previous coatings without the loss of gloss level, adhesion or durability. Availiable in white For use with synthetic high opacity undercoats
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Understanding Automotive Primers and Undercoats
Automotive primers and undercoats are the first essential layer in automotive paint systems. They ensure that the final coat adheres effectively to the substrate, whether it’s metal, plastic, or fibreglass. These products are designed to enhance adhesion, protect surfaces from corrosion, and fill small imperfections. By providing a smooth, sealed surface, they prepare the vehicle for a flawless topcoat.
The Importance of Automotive Primers and Undercoats
Primers and undercoats are crucial for both the protection and longevity of the vehicle’s paint. Automotive primers form a bond between the bare surface and the subsequent paint layers, ensuring durability in extreme conditions like high temperatures and exposure to moisture. Undercoats provide an additional layer that helps smooth out minor surface flaws and improve the finish of the final topcoat. These coatings also prevent rust on metal surfaces, extending the life of the paintwork and reducing the risk of future damage.
Applications in the Automotive Industry
Automotive primers and undercoats are applied across a range of areas, from new vehicle production to bodywork repairs and restoration projects. Commonly used on metal, aluminium, plastic, and fibreglass, they are essential for areas exposed to harsh conditions, such as wheel arches, undercarriages, and body panels. In body shops, these coatings are used to restore damaged areas, preparing them for repainting and ensuring a high-quality finish. They are particularly important in protecting vehicles from environmental factors like salt, water, and road debris.
Selecting the Right Automotive Primer or Undercoat
Choosing the correct automotive primer or undercoat depends on the material being painted and the specific requirements of the project. Metal primers may differ from plastic or fibreglass primers, each offering distinct benefits. For example, high-build primers are ideal for levelling uneven surfaces, while etch primers are excellent for promoting adhesion to bare metals. In vehicle restoration, especially for classic cars, corrosion protection is key, making the selection of the right primer critical for long-term durability.