Sandtex Flexible Primer Undercoat

About this product:

Specially formulated for use with the Sandtex Trade Flexigloss and Eggshell X-tra finishing systems on exterior joinery, this solvent borne, high performance flexible Primer Undercoat provides superior resistance to cracking and flaking than traditional individual primer and undercoat systems. The Flexi X-tra systems can also be used on suitably primed PVC-u.

Technical Information

Touch Dry

4-6 hours


16 hours


Up to 15m² per litre


Low to mid-sheen

Key Benefits

  • Adhesion promoting formulation
  • Flexes with substrate to alleviate flaking and cracking

Product Information

  • Sizes

    2.5lt, 1lt

  • Colours

    White, Various Colours

Application Method

One or two full coats as required to previously painted surfaces. Maintain a wet edge. Finish with Sandtex Trade Flexigloss X-tra or Sandtex Trade Eggshell X-tra as preferred.

Stir well before use. Apply by brush to an even thickness (a good quality bristle or suitable designed synthetic brush gives best results). Maintain a wet edge. On timber lay off in the direction of the grain.