Sika Sikalastic Metal Primer

Part A: UN1263 (Class: 3, Pk Grp: III), Part B: UN3469 (Class: 3, Pk Grp: III)
Formulated for application to exposed metal substrates prior to the application of Sika Liquid Plastics Roofing and Balcony Waterproofing System.
Available in 5 Litres in Grey
£212.66 £177.22
In stock
Product Description

Sika Liquid Plastics Metal Primer is a 2 pack anti-corrosive primer for application to exposed metal substrates prior to the application of Sika Liquid Plastics Roofing and Balcony Waterproofing System.

Best Uses

Sika Liquid Plastics Metal Primer is a 2 part epoxy anti-corrosive primer consisting of a grey base (Part A) and an activator (Part B), used as part of the Decothane Base Coat and Decothane Balcony waterproofing system a single component, cold-applied, moisture-triggered polyurethane membrane. It cures to form a seamless, durable and weather resistant waterproofing solution for exposed roof areas.


Sika Liquid Plastics Metal Primer is applied to metal surfaces to protect the metal from rusting before the Decothane or Sikalastic 618 liquid roofing is applied. At 20°C it is expected to be touch dry but not fully cured after 3 hours but it will still cure at temperatures as low as 5°C. allowing recoating to take place after 6 hours. Metal Primer is also suitable for application as a barrier coat over bituminous substrates such as roofing felt or asphalt.

Apply one coat of Sika Metal Primer at a rate of 0.15 litres per m2 per coat, equivalent to a maximum of 6.5 m2 per litre to achieve a minimum dry film thickness of 130 microns. locations where high levels of protection of bare metal is necessary, sharp/cut edges or angles or areas that have been subject to heavy preparation may require two coats, coverage for these areas will depend upon substrate surface and profile. Always make an allowance for application losses, surface irregularities, etc.

Application onto surfaces other than metal i.e. mineral felt when being used in conjunction with the Decothane Solar 25 System may result in a reduced coverage rate.

Technical Details


  • Anti-corrosive primer for exposed metal substrates, used prior to the application of Decothane Base Coat and Decothane Balcons waterproofing system.
  • Low temperature curing down to 5°C.
  • Exceptional corrosion protection
  • Can be used as Barrier Primer over bituminous substrates when used in conjunction with fully reinforced roofing or balcony system
  • Compatible with many well adhered existing coatings and roofing systems, adhesion testing should always be carried out
  • Can be over coated with a wide range of Liquid Plastic's membranes 
  • Offers good levelling and curing even at lower temperatures

Technical Info

Components: Two Components
Type: Amide curing primer
Finish: -
Stock Colours: Pearl Grey liquid (Part A); brown liquid (Part B)
Tintable: No
VOC Content: -
Volume Solids: -
Suitable Substrates: Metal. Suitable for industrial and marine environments
Application Method: Brush, Airless Spray
Theoretical Coverage: Apply in two coats, at a rate of 0.15l/m2
Wet Film Thickness (WFT): -
Dry Film Thickness (DFT): 130 microns
Induction Time: -
Pot Life: 1 hour at 20°C
Touch Dry: 3 hours at 20°C
Overcoatable: 6 hours at 20°C
Cleaner / Thinner: Thoroughly clean out airless sprays before leaving, within the pot life
Shelf Life: 12 months from date of production unopened or 'use by' date where specified
Packaging: Available in 5 Litres

The manufacturers data sheets are available for download from this website. It is your responsibility to read and understand all aspects of the data sheets before you place an order and prior to application. Please pay special attention to the preparation, mixing and application temperatures of the product, cleaning of substrate and environmental factors such as temperature, rain etc. Quoted coverage rates are based on the manufacturers theoretical rates and may vary depending upon substrates absorption, texture and application. We always recommend a test is carried out to ensure suitability.

Customer further agrees that Promain have no liability for any errors or omissions contained within the Product Data Sheets and are not liable for failure due to misapplication or inadequate substrate cleaning and preparation. For more information please refer to our Terms & Conditions.

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