Swarco Hitex Swarcoplast Primer Roll 120, previously known as CM Primer, is a low viscosity, colourless, 2-component reactive resin based on methyl methacrylate (MMA).

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• Features & Benefits
• Technical Data
• Substrate Preparation
• Mixing
• Application

Features & Benefits

• Exhibits excellent adhesion to metal and concrete substrates
• Easy to apply
• Used as primer to give excellent bonding to concrete and metal substrates (e.g. iron, aluminium, stainless steel)
• Strongly recommended, with Swarcoplast Primer Roll 120 (previously CM Primer), that curing and adhesion tests are conducted on the particular substrate prior to general use on site

Technical Data

Swarcoplast Primer Roll 120 (previously CM Primer) requires the use of a catalyst to enable curing of the system.

Please note that an objective comparison with other data is only possible if norms and parameters are identical.

Substrate Preparation

All substrates must be dry, firm, solid and free of dust, fat and oil. Loose tiles and tiles over hollows must also be removed. Laitance and loose articles must be thoroughly removed. Steel substrates must be prepared to SA 2.5 (according to DIN 55929).

Surface structure shall allow the correct application of the primer.

• Surface tensile strength shall be min. 1.5 MPa.
• Mechanical preparation shall expose concrete aggregate.
• Visible pin holes and craters shall be filled separately using filled primer or suitable cement mortar.

For further details, see the Installation Method Statement available from the data sheet tab above.

Mixing

Prior to use Swarcoplast Primer Roll 120 (previously CM Primer) must be carefully stirred to achieve a uniform distribution of the paraffin contained in the product. Swarcoplast Primer Roll 120 (previously CM Primer) is thoroughly mixed together with the Catalyst (50% dibenzoyl peroxide), in accordance with the below guidelines.

It should be noted that the amount of catalyst powder to be added depends upon the substrate temperature.

Note: Weight to Volumetric conversion of Catalyst.

• 1 cm³ of Catalyst weighs 0.64g
• 1 g of Catalyst = 1.57 cm³

Application

• Substrate surface temperature may range from 0°C to 40°C.
• Do not apply when surface temperature is above 40°C and/or rapidly rising. Special care must be observed if area is under exposure to direct sunshine.
• Substrate temperature must be at least 3°C higher than the actual dew point.

After the catalyst has been stirred in, the primer is poured onto the substrate in stripes and distributed with a short-pile paint roller. A notched rubber squeegee can be used for fast distribution of large quantities.

Apply at a rate of between 300 g/m² to 500 g/m² depending on density and porosity of the substrate. In any case, continue applying primer until saturation occurs to obtain a continuous resin film. On extremely porous substrates a second prime coat may be required.

When a continuous resin film is obtained, broadcast fire-dried quartz sand (particle size 0.7 - 1.2 mm or 0.3 - 0.7 mm) into the still wet primer.

Consumption of this broadcast sand:

• Approximately 0.3 kg/m².

For further details, see the Installation Method Statement available from the data sheet tab above.