Priming sealing before painting or rendering.
FireCrunch must always be sealed and finished regardless of where or how it is used, however this is particularly important in areas of high humidity. Extra care must be taken to ensure the board is sealed correctly on the face, top and exposed edges, leave the inner back rough side of board unsealed.
All FireCrunch MgSO4 composite fire boards must be pre-sealed with Klaas S1 AquaCrunch (vapour Permeable” prime sealer. Failure to use this product before painting or rendering will void the warranty. Available direct wholesale from FireCrunch (Ask us).
FireCrunch will not attract mould or mildew and bacteria cannot survive on (MgSO4).
Correct preparation and sealing will ensure a long life for your building.