Sandtex 10 Year Exterior Multi-Surface Primer Undercoat

Sandtex 10 Year Exterior Multi-Surface Primer Undercoat is designed to prepare and seal a wide range of exterior surfaces before painting. Suitable for use on wood, weathered PVC-u, brick, concrete, stone, aluminium and non-ferrous metal, it helps create a smooth, even basecoat for exterior topcoats.

Ideal for exterior renovation and maintenance projects, the flexible water based formulation is designed to cope with changing weather conditions while helping improve the overall finish and durability of subsequent paint systems. For best results, use with Sandtex 10 Year Exterior Multi-Surface Gloss Paint.

All surfaces must be clean, dry and free from dust, grease, wax, rust and loose material before application. Proper preparation will help improve adhesion and create a smoother, longer lasting finish for exterior topcoats.

• Remove all loose, flaking or peeling coatings and thoroughly abrade previously painted surfaces to provide a sound key
• Weathered, grey or denatured timber should be sanded back to a clean, smooth surface before priming
• Fill cracks, holes and surface imperfections with a suitable exterior grade filler and allow repairs to fully dry
• For bare wood, ensure the timber is dry and treat knots or resinous areas with an appropriate knotting solution
• Previously painted surfaces should be cleaned with a mild detergent solution, rinsed thoroughly and allowed to dry
• Remove rust, oxidation and corrosion from metal surfaces before application
• Carefully dust off all surfaces after sanding and preparation before applying the primer undercoat

We recommend trialing a test area before starting your project to check suitability, adhesion and final appearance. For best results, apply in dry conditions when temperatures remain above 8°C during application and drying. Avoid application during damp, wet or high humidity conditions.

• Stir thoroughly before and during use to maintain an even consistency and finish
• Apply evenly using a good quality synthetic brush or medium pile exterior roller
• Apply a full, even coat and avoid over spreading the primer undercoat during application
• Pay particular attention to edges, joints, exposed end grain and repaired areas to ensure complete coverage
• Allow approximately 1 hour drying time before applying additional coats or topcoats under normal conditions
• For best long term performance, follow with 2-3 coats of Sandtex 10 Year Exterior Multi-Surface Gloss Paint

1) What surfaces can Sandtex 10 Year Exterior Multi-Surface Primer Undercoat be used on?
Suitable surfaces include exterior wood, weathered PVC-u, brick, concrete, stone, aluminium and non-ferrous metal. All surfaces should be clean, dry and properly prepared before application.

2) Does this primer undercoat need a topcoat?
Yes, this product is designed to be overcoated with a compatible exterior paint system. For best long term durability and weather resistance, Sandtex recommend using it with Sandtex 10 Year Exterior Multi-Surface Gloss Paint.

3) How quickly does Sandtex Multi-Surface Primer Undercoat dry?
Under normal drying conditions the coating is typically touch dry in around 30 minutes and can usually be recoated after approximately 1 hour.

4) Can this primer undercoat be used on weathered PVC-u?
Yes, the product is suitable for use on properly prepared weathered PVC-u surfaces, helping improve adhesion before applying exterior topcoats.

5) Does Sandtex Primer Undercoat help resist cracking and flaking?
The flexible formulation is designed to move with exterior surfaces and helps reduce cracking, peeling and flaking when used as part of a complete exterior paint system.

6) Is Sandtex 10 Year Exterior Multi-Surface Primer Undercoat water based?
Yes, this is a water based primer undercoat with a low odour formulation designed for exterior use on a range of surfaces.

7) Can this primer undercoat be applied in cold or damp weather?
For best results, apply in dry conditions when temperatures remain above 8°C during application and drying. Avoid application during wet weather, high humidity or where frost is expected.