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Sandtex 10 Year Exterior Multi-Surface Primer Undercoat
A quick drying water based primer undercoat for exterior wood, PVC-u, metal and masonry surfaces that improves adhesion and helps resist mould growth
Features
- Water based primer undercoat for exterior wood, PVC-u, metal and masonry surfaces
- Improves adhesion and provides a durable base for exterior topcoats
- Designed for use as part of the Sandtex 10 Year Exterior Gloss system
- Quick drying formula, touch dry in approximately 30 minutes
- Re-coatable after approximately 1 hour under normal conditions
- Flexible coating helps resist cracking, peeling and flaking
- Mould resistant finish for long lasting exterior protection
- Low odour formulation with minimal VOC content
Brand
Drying time
6 hrs
Coverage
Up to 15 m2 per litre
No. of coats
1
Size
750ml
MPN
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GTIN
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Overview
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.
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Preparation
Preparation
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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
Application
Application
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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
Finishing
Finishing
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Sandtex 10 Year Exterior Multi-Surface Primer Undercoat should be overcoated once fully dry to achieve maximum durability and weather protection. Leaving primed surfaces exposed for extended periods before topcoating may affect overall finish performance, particularly on heavily exposed exterior surfaces.
For best long term results, use with 2-3 coats of Sandtex 10 Year Exterior Multi-Surface Gloss Paint. Periodically inspect exterior joinery and previously repaired areas for signs of wear or damage and touch up exposed areas promptly to help maintain protection and appearance.
F.A.Q.
F.A.Q.
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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.