Product Details

No. 1 Epoxy Primer


No.1 Epoxy Primer is the basis for High Performance marine systems.

Epoxy Primer No.1 is recommended for use as :

  • Primer on suitably prepared steel, alloy, GRP and wooden substrates
  • Multi-coat primer and self-build system
  • Primer and seal coat for 421 epoxy fairing systems

No.1 Epoxy Primer may also be used to seal off prepared, aged coatings prior to repainting - refer also to No.4 Epoxy  Sealer Undercoat.

No.1 Epoxy Primer is ideal for use below the water-line as a tie coat between aged epoxies and Altex Yacht & Boat Antifoulings:- No. 5 Ablative, No. 10 Semi-Ablative, Vivid, Hydrocoat.

Limitations: No. 1 Epoxy Primer is a thin film adhesion primer. It is not designed for thick film application - apply at 50 - 75µm maximum. Further, it is not designed to be sanded - refer to No.2 High Build Sanding Surfacer and No.3 Primer Undercoat.

Download: No. 1 Epoxy Primer Data Sheet


  • Excellent adhesion to a wide variety of substrates
  • Formulated for use above and below water - simplifies full hull painting projects
  • Very long mixed pot life
  • Excellent long term re-coatability
  • Lead and chromate free
  • Very rapid dust-free and touch dry response
  • Iso-cyanate free
  • Excellent anti-corrosive properties

Specific Data:

Generic Type: Polyamide Epoxy

Colour: Grey

Packaging: 1.25 litre and 5 litre, Two component kits

Mix Ratio: 4 to 1 by volume

Gloss: Flat

Flash Point:  27°C

Thinner: Spray Altex Thinner #12, Brush/Roller Altex Thinner #22

Pot Life: 12hours at 25°C

Induction Time: 15 minutes

Storage: Store under cool, dry conditions

Density: 1.33 kg per mixed litre

Volume Solids (Mixed): 45%

Theoretical Coverage Rate: 9.0 sq metres per litre at 50 microns dry

Recommended Film Thickness Per Coat: 111 microns wet to obtain 50 microns dry

Application:  Spray, brush or roller

Dry Times (50 µm DFT / 25°C / 50% RH): Touch Dry 1 Hr, Hard Dry 8 Hrs

Recoat Times (50 µm DFT / 25°C / 50% RH):

Minimum - 2 Hr with self, No.3 or No.5 Antifouling
Maximum Aged - 24 Hrs with Various Antifouling (see above), 3 months with self or No.3