PRIMER SN Primer 20kg

Mapei Primer SN – Two-Component Filled Epoxy Primer

Mapei Primer SN is a two-component, fillerised epoxy primer designed to prepare cementitious substrates before applying compatible resin flooring systems and self-levelling cementitious mortars. It helps improve adhesion and provides a suitable bonding layer for a range of professional flooring applications.

Primer SN is formulated for use beneath Mapei Mapefloor epoxy and polyurethane resin systems, as well as compatible Ultratop cementitious flooring products. It can also be coloured using Mapei Mapecolor Paste.

Key Benefits

• Two-component, fillerised epoxy primer.
• Designed to improve adhesion between prepared substrates and compatible flooring systems.
• Suitable for use beneath selected epoxy and polyurethane resin systems.
• Compatible with specified Ultratop self-levelling cementitious flooring products.
• Can be coloured using Mapei Mapecolor Paste.
• Suitable for civil and industrial flooring applications.
• Available in 5kg and 20kg kits.

Applications

Mapei Primer SN is designed for preliminary priming treatments on suitable substrates before installing compatible flooring systems, including:

• Mapefloor epoxy resin flooring systems.
• Mapefloor polyurethane resin flooring systems.
• Ultratop self-levelling cementitious mortars.
• Ultratop Living flooring systems.
• Suitable cementitious substrates.
• Terrazzo and other approved flooring substrates.

It is suitable for selected civil and industrial flooring applications, including warehouses, commercial premises, showrooms and other areas requiring resin or cementitious floor finishes.

Technical Features

• Product type: Two-component epoxy primer with fillers.
• Mixing ratio: Component A : Component B = 80 : 20 by weight.
• Mixed colour: Neutral.
• Consistency: Thick fluid.
• Mixed density: Approximately 1,500kg/m³.
• Pot life: Approximately 30 minutes.
• Application temperature: +8°C to +35°C.
• Dust dry: Approximately 6 hours at +23°C and 50% relative humidity.
• Light foot traffic: Approximately 24 hours at +23°C and 50% relative humidity.
• Final setting: Approximately 7 days.
• Consumption: Approximately 0.3–0.7kg/m² per coat, depending on substrate absorbency and characteristics.
• Application method: Flat American trowel or smooth trowel.
• Storage: 24 months in original sealed packaging, when stored correctly.

Packaging Options

• 5kg kit: 4kg Component A + 1kg Component B.
• 20kg kit: 16kg Component A + 4kg Component B.

Mixing and Application

Primer SN is supplied as two separate components. Mix Component A and Component B in the correct 80:20 ratio by weight until a uniform mixture is obtained.

Apply to a suitably prepared substrate using a flat American trowel or smooth trowel. The substrate must be properly prepared and free from loose material and contamination that could affect adhesion.

Only mix the quantity that can be applied within the product's approximately 30-minute pot life. Temperature and site conditions can affect working and curing times.

Where a particular flooring system requires a mechanical key, follow the relevant Mapei system instructions regarding quartz sand broadcasting and subsequent application layers.

Important Application Information

• Use only on substrates and within flooring systems approved by Mapei.
• Follow the specified mixing ratio of 80:20 by weight.
• Do not use material beyond its working time.
• Observe the required waiting times before applying subsequent layers.
• Check the relevant flooring system technical documentation for overcoating and preparation requirements.

Technical Data Sheet and Safety Data Sheet

Refer to the manufacturer's technical and safety documentation before mixing or applying Primer SN.

Frequently Asked Questions

What is Mapei Primer SN used for?

Primer SN is a two-component epoxy primer used to prepare suitable substrates before applying compatible Mapefloor resin systems and Ultratop cementitious flooring products.

What is the mixing ratio for Primer SN?

The mixing ratio is 80 parts Component A to 20 parts Component B by weight. The 5kg kit contains 4kg of A and 1kg of B, while the 20kg kit contains 16kg of A and 4kg of B.

How much Primer SN do I need per square metre?

Typical consumption is approximately 0.3–0.7kg/m² per coat. Actual consumption depends on the absorbency and characteristics of the substrate.

How long does Primer SN take to cure?

At +23°C and 50% relative humidity, it is typically dust dry after approximately 6 hours, suitable for light foot traffic after 24 hours and finally set after approximately 7 days.

What is the pot life of Primer SN?

The approximate pot life is 30 minutes. Prepare and apply the mixed material within its working time.

Can Primer SN be used with Ultratop?

Yes. Primer SN is used as a preliminary primer with compatible Ultratop cementitious flooring systems. Always check the technical documentation for the specific flooring system being installed.

Can Primer SN be coloured?

Yes. Mapei Mapecolor Paste can be used to colour Primer SN, following the manufacturer's instructions.

Buy Mapei Primer SN from Clever Shield

Clever Shield supplies Mapei professional flooring products throughout the UK. Contact our team for pricing, availability and product information.

We supply materials but do not design or specify flooring systems. Always follow the manufacturer's current technical data sheet and installation instructions.