Level 1 Diploma in Painting and Decorating

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Primers and sealers

Unit 117: Preparing surfaces for decoration

Level 1 Diploma in Painting and Decorating

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Knotting solutionWhere is it used?

Knotting solution is used on bare timber that requires knots in the timber to be sealed prior to decorating. Failure to do this will result in the resin seeping from the knot and staining the paintwork.

Different types

It comes in three types:

• Shellac

• Patent

• White knotting

What do you think it is made from?

Level 1 Diploma in Painting and Decorating

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Types of primerPrimers are important as they seal and protect the surface.

Failure to prime the surface will result in the paint system breaking down and the surface rotting or rusting.

• Acrylic

• Universal wood

• Universal metal

• Alkali resisting

• Aluminium

Level 1 Diploma in Painting and Decorating

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Any questions?