FAQs

The natural Gypsum that makes up our Thistle plaster range varies slightly in composition from site to site due to natural impurities in the surrounding rock, one of these impurities is quartz, a form of crystalline silica.

Thistle GypPrime can be diluted, normally a ratio of 1:5 parts water provides adequate suction control, or it can also be used neat if necessary to control extremely severe suction. One tub covers up to 600 sqm (diluted 1:5) or 100 sqm undiluted.

Management of high suction backgrounds would be dependent on the substrate and the material being used.

A 25kg bag of Gyproc DriWall Adhesive is suitable for two 1200x2400mm plasterboards under normal use, however more adhesive will be required if the background is not plumb or straight.

When using ThistlePro DuraFinish over undercoat plasters ensure that the undercoat plaster has been prepared using Thistle GypPrime.

Plastering on existing painted walls is only possible if the paint is in very good condition.

In terms of adhesion and cleanliness, and with the application of Thistle Bond-it prior to plastering. We suggest carrying out this procedure on a trial area to determine the suitability (adhesion).

E-WM-1, E-WM-2, E-WM-18 & E-WM - 21 all deal with dense and lightweight aggregate blockwork with a 2 coat plastered lining.

Undercoat plasters are usually applied at 11mm and most finish coat plasters are applied at 2mm. Recommendations for the application thickness of Thistle plaster products can be found in our selector guides: ThistlePro Selector Guide, Thistle Essential Selector Guide. The charts also include coverage, setting times, and other application information.

No, tiles should not be applied directly to Thistle undercoats, with the exception of Thistle DriCoat.