Heat Resistant Plaster S


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Heatproof Plaster High temperature smooth finish.*Protection up to 650C *For use around the opening of cassette fireplaces (sometimes called hole in the wall fires) and adjacent to wood burning stoves and range cookers where the area of the wall is subjected to intense heat.

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Heat Resistant Plasteris high temperature smooth finish render. Protection up to 650C (1200F) Vitcas Heat Resistant Plaster is a replacement material for gypsum plaster where the temperatures are too high for gypsum plaster to stay on the wall. For use around the opening of cassette fireplaces (sometimes called hole in the wall fires) and adjacent to wood burning stoves and range cookers where the area of the wall is subjected to intense heat.

The procedure for mixing and applyingHeat Resistant Plasteris NOT the same as for ordinary Gypsum Plaster.

The plaster should be used in the areas subject to intense heat approx 3m2(32 ft2) around the fire opening. The plaster can only be applied onto Vitcas Fireplace Render or onto Vitcas High Temperature Plasterboards.

*We recommend rendering and plastering the whole chimney breast withVITCAS®RENDER & PLASTER SYSTEM.

The maximum recommended thickness of the material is 6mm. If applying ontoVITCAS®FIREPLACE RENDERit is important to ensure that the Vitcas®Fireplace Render is fully dried prior to applying Vitcas®Heat Resistant Plaster. The Vitcas®Fireplace Render should be left to dry for at least 3 days in temperatures above +20C and for longer if moisture is still present as apparent by the colour of the material. If possible apply heat after day one ie light the fire or use another type of heater.  If applying ontoVITCAS®HIGH TEMPERATURE PLASTERBOARDthen the boards should be fixed with the rough reverse face exposed for plastering.

In both cases the area to be covered should be prepared by coating with undilutedVitcas®PVA Adhesive Sealer. Plastering should commence when this PVA becomes tacky.

The material should be mixed with cold tap water to a useable consistency with a plaster mixer / drill attachment. There should be no traces of ordinary Portland cement or gypsum plaster on the tools or in the mixing buckets. It is best to mix the plaster in the bucket in which it is supplied.

Take care not to mix the material too wet. As a guide the amount of water required is approximately 200 ml per kilo of plaster.

A thickness of approx 3-6mm should be applied. It is important that the plaster is applied evenly i.e. no featheredges. The plaster should be first applied so that the surface is flat but not necessarily smooth. After 15 to 20 minutes the surface should be trowelled up smooth. The surface finish must be obtained during flotation with the trowel because the material cannot be sanded when dry due to the surface being dense and non-porous.  Any minor cracks can be repaired usingVITCAS®HEAT RESISTANT FILLER. It is possible to re-coat the material with PVA and reskim after the plaster has dried if a second coat is necessary for any reason. When dry the finished surface forms a very hard heat resistant surface that can be painted over as required.VITCAS®HEAT RESISTANT PLASTERmust be allowed to air dry for at least 3 days before lighting fire.

Instructionhow to use VitcasHeat Resistant Plaster

If you need help for the amount of product to buy you can useVitcas Quantity Calculator

Keep any unused material dry and store in a cool dry place away from children and pets. Warning: Do not breathe the dust. In case of contact with skin and eyes rinse immediately with plenty of water and seek medical advice. After contact with skin, wash with water. Wear suitable gloves and eye face protection. Keep out of reach of children.

These instructions and recommendations define the material and the method of use but cannot be considered as a substitute for the skills, training and qualifications of the contractor.

In addition to these recommendations, the requirements of the building regulations, the recommendations of the appliance manufacturer and general health & safety considerations may be applicable.

Vitcas Ltd guarantees the quality of the products but has no control over the way in which the products are used. If there is any doubt the customer is advised to carry out his own trials of the materials before starting the work.

Your RatingEasy to Use1 star2 stars3 stars4 stars5 starsQuality1 star2 stars3 stars4 stars5 starsNicknameSummaryReviewSubmit ReviewRelated PostsBuilding a Fireplace - Heat Accumulation & Insulation7 September 2022Everything You Need To Know About Mounting A TV Over Fireplace Wall8 February 2018Using Heat Resistant Render and Plaster System24 May 2017Product Questions (2)Customer QuestionsHi do I need to mist coat vitcas plaster,or paint straight emulsion on?

You may directly paint the Vitcas Heat Resistant Plaster with emulsion.

The coverage of Heat Resistant Plaster 20kg is approximately 2m2 (20ft2) at 6mm (1/4) thickness.

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