Sandtex Flexible Primer Undercoat Gray

Sandtex Flexible Primer Undercoat Gray

Sandtex Flexigloss Colours 2.5L

Sandtex Flexigloss Colours 2.5L

Sandtex Exterior Gloss Black

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From £15.97 £13.31

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Free delivery for orders £50 and over (UK mainland - Next Day Delivery*)

£5.99 delivery for orders less than £50 (UK Mainland - Next Day Delivery*)

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Please note: This product has no tint options. 


Specially formulated to provide long lasting protection for exterior joinery and suitably primed metal.

All surfaces must be suitably dry, and free from anything that will interfere with the adhesion of the materials to be applied.

Rub down with a suitable grade of abrasive paper and round sharp edges 1-3mm.

Remove all dust. Timber with oils/extractives must be swabbed with clean methylated spirits, frequently changing the face of the cloths.

Treat knots with two thin coats of fresh knotting.

Fill any fixing holes, open joints and shallow surface defects with Sandtex Trade Mixed Filler.

Rub down with a suitable grade of abrasive paper & remove all dust.

Prime with one coat of Sandtex Trade Flexible Primer Undercoat


  • Weight 1.000000
  • Product Application Brush or Roller
  • Coverage 15sqm per ltr
  • Touch Dry 4-6 hours
  • Recoatable 4-6 hours
  • Thinning Do Not Thin
  • Surface Exterior Wood
  • Water or Oil Oil Based

Free delivery for orders £50 and over (UK mainland - Next Day Delivery) 

£4.99 delivery for orders less than £50 (UK mainland - Next Day Delivery)

Restrictions apply.

* We are working hard with our delivery partners to ensure that all deliveries are completed * Further details here.


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This is based on a coverage of 10m² per litre of paint and one coat of paint.

Make sure you always check the coverage on the product page before purchasing and, if covering a dark or bright colour, you may need two or three coats.