MASTER-CEM is an excellent cement mix consisting of selected fluidifying resins with internal lamination. MASTER-CEM is activated by adding 32.5 cement to the mixture, obtaining a waterproofing resistant to permanent water stagnation
it can be left exposed while waiting to be tiled after several months, up to a maximum of 24 months. The product is resistant to sunlight exposure.
MASTER-CEM has been designed to be applied exclusively with water pull after the application of FIBRANET (high-tensile glass mesh FIBRANET160).
WHAT IT’S FOR
MASTER CEM is used for waterproofing large roofing surfaces such as roofs and terraces, that are practicable or not.
METHOD OF USE
- SURFACE PREPARATION
The surfaces to be waterproofed must have a sufficient gradient for water to flow when the treatment is finished.
The support must be compact and flat, in the absence of such conditions, adequate preparation of the same should be provided.
1-Surfaces already paved: Check the perfect adhesion to the bottom of the tiles that must also be dry and perfectly clean (remove the presence of oils, grease or grease with special detergent for difficult dirt MAXXXI and for dirt from lime and cement use lime and cement dissolver STRONG instead).
2 – Surfaces with cement screeds, vertical plastered, old and / or new: Before waterproofing, it is necessary to remove and rebuild deteriorated screeds with vertical mortars and they must be dried and aged (for new screeds it will take at least 28 days to complete curing, furthermore the residual humidity must be less than 4 % by weight to be determined by a professional hygrometer).
Some covers must include the insertion of breather elements for the escape of water vapor.
3-Surfaces already waterproofed with sheaths or bituminous products: They must be perfectly clean and free of dust; Fix any laceration, tearing or detachment with bituminous products.
Check the condition of any expansion joints and if they have deteriorated proceed with their reopening, cleaning and reconstruction.
Once the cleaning and drying are complete start the treatment of the vertical surfaces by cutting the fibreglass net (FIBRANET 160) to a height of about 30 cm, apply our primer POWER GRIP and adhere the net making it fall 5 cm
on the horizontal floor. Spread FIBRANET 160 on the horizontal surface, spreading and overlapping from the net prepared at the vertical corners. Then pour POWER GRIP on the net itself by using a water pull and steel spatula making sure to distribute it evenly.
- PRODUCT PREPARATION
After 2-3 hours (depending on environment temperature), prepare and apply as instructed below:
Add the 32.5 cement directly to the MASTER CEM container (5kg for the 15kg package and 1.5kg for the 4.5kg package).
Mix for a few minutes with a mixer with impeller until a homogeneous lump-free mixture is obtained (3% of water can be added during the hot season).
The product can be applied by roller, spatula, brush or airless pump.
Spread a first coat of product, apply a second coat after completely dried (approx. 2-4 hours)
and if necessary, after drying, proceed with a third coat to completely cover the reinforcement.
For old floors with sheaths or bituminous products the specific adhesion promoter is our “NTX-PRIMER h 0”. Once the primer has dried, apply the adhesive NTX on the surface ready for waterproofing by spreading the fiberglass mesh and applying MASTER CEM, incorporating the mesh as above.
The applied product shall not have a thickness less than 1, 5-2 mm.