products

Multi-seal

Astec® Sealer and binder for loose or powdered surfaces before painting.

Multi-Seal offers outstanding sealing, binding and stain bleed resistance. When used as the first coat of a coating system for new and aged construction surfaces. Multi-Seal penetrates the surface and binds in any loose particles to the substrate ensuring the surface is free of contaminants that can ultimately cause adhesion failure of subsequent undercoats and protective finishes.

Features
  • Outstanding contaminant binding.
  • Excellent substrate wetting.
  • Strong binding power.
  • Excellent stain bleed resistance
  • Strong inter-coat adhesion.
  • No aggressive solvents.
  • Alcohol & water based.
Benefits
  • Binds loose surface contaminants.
  • Deep surface penetration.
  • Stabilizes powdery surfaces.
  • Holds back staining.
  • Bonds with final topcoat.
  • Does not blister old paints.
  • Two hour recoat.
Product Data Sheet Material Safety Sheet
Available Sizes:4, 10, 15, 20 Litre
Clean up:All Purpose Thinners
Coverage:15m2/Litre
Volume Solids:15%
Touch Dry:30 Minutes
Recoat:Two Hours
Uses:

Unlike paint, Multi-Seal is a non film forming material, the product is designed to penetrate the substrate, (not coat it), and bind any loose surface particles to a hard finish.

Multi-Seal offers outstanding sealing, binding and stain bleed resistance. When used as the first coat of a coating system for new and aged construction surfaces.

Surfaces:

Correctly prepared new and aged plaster, cement based skim coats, renders precast concrete, timber, fibro, paper faced boards existing powdery membranes.

Application:

Apply straight from the drum by brush, spray or roller. Apply one flood coat sufficiently thick to uniformly wet and saturate the surface. Highly porous surfaces may require multiple coats to be applied wet on wet.

Care must be taken to ensure complete cover when the product is being used to seal in stains or plasticizers. Any missed areas will allow satins to continue to bleed. For spray applications use a 515 to 518 tip. Any air or low pressure spray will atomise this material. For roller applications, a low nap synthetic roller is most suitable.

Preparation:

All surfaces must be clean, dry, free from large surface contaminants and structurally sound. Surface preparation may be carried out by the use of high pressure water cleaning, power buffing or scraping or vacuum cleaning.

Mould and fungus infested walls should have sodium hypochlorite applied to the substrate prior to pressure washing. This process will kill any moulds and assist in their removal. Any structural cracks should be saw cut and struck smooth with a cementitious or low shrink grouting compound.

With the surface clean and structurally sound, apply two coats of Astec Barrier and allow to dry prior to the application of any top coats or sealers. Astec Barrier will retard any under film mould spoilage.

If Unsure, Contact Astec for the correct preparation technique, sealers, primers and undercoats before proceeding.