Mariseal Aqua Primer

The Mariseal Aqua primer is mainly used as a primer for polyurethane waterproofing coatings, polyurethane joint sealants and polyurethane and epoxy floor coatings on non-absorbent surfaces like: Power floated concrete, metal (various), asphalt, bitumen felts, ceramic tiles, glass, old acrylic-based coatings. It can also be used as a primer on absorbent surfaces like concrete, mortar, plaster, and timber. It is also used as a tack-coat between coating layers if inter-coating time intervals are overstepped. Coverage is typically 100 - 200 gr/m2 in one or two layers. This coverage is based on practical application by roller onto a smooth surface in optimum conditions. Factors like surface porosity, temperature, humidity, application method and finish required can alter consumption. The Mariseal Aqua Primer is supplied milky yellow. When components are cured it goes transparent and is the considered ready for use.

Careful surface preparation is essential for optimum finish and durability. Any surface needs to be clean and sound, free of any contamination, which may harmfully affect the adhesion of the primer. Maximum moisture content should not exceed 7%. Substrate compressive strength should be at least 25MPa, cohesive bond strength at least 1.5MPa. Old coatings, dirt, fats, oils, organic substances, and dust need to be removed. Possible surface irregularities need to be smoothened. Any loose surface pieces and grinding dust need to be thoroughly removed.

Mariseal Component A and Component B should be mixed by low-speed mechanical stirrer, according to the stipulated mixing ratio, for about 3-5 min. The mixing of the components must be very thorough, especially on the walls and bottom of the pail until the mixture becomes fully integrated. Dilute mixture with 15-25% of clean water, to regulate viscosity. For best results, the temperature during application and cure should be between 5oC and 35oC. Low temperatures slow down curing time, whilst high temperature speeds up curing. High humidity may affect the final finish. Apply the Mariseal Aqua Primer (diluted with clean water) by roller or brush, until the surface is covered. After approx. 6-12 hours (not later than 24 hours) and/or while the primer is still slightly tacky, apply the polyurethane coating or the polyurethane joint-sealant if required. If the surface is very brittle, like lightweight concrete or porous cement screed, apply two layers of the primer. Do not apply the Mariseal Aqua Primer at ambient and ground temperatures under 10oC.

The product is supplied in 15+5 kg and 3+1 kg pails. Pails should be stored in dry and cool rooms for up to 12 months. Protect the material against moisture and direct sunlight. Storage temperature: 5oC - 30oC. Products should remain in their original, unopened containers, bearing the manufacturers name, product designation, batch number and application precaution labels.

The product contains amines and epoxy resins. See information supplied by the manufacturer. Please study the safety data sheet. PROFESSIONAL USE ONLY.

Our technical advice for use, whether verbal, written or in tests, is given in good faith and reflect the current level of knowledge and experience with our products. Our technical advice for use, whether verbal, written or in tests, is given in good faith and reflects the current level of knowledge and experience with the product.

• Applied by brush or roller.

• Able to be coated with Mariseal 250 quickly in as little as 20 minutes in hot weather

• Colder temperatures slow curing time

• Substrate types affect curing

• Is a milky colour when first applied, when clear in is considered ready for coating

• Do not store in direct sunlight

• Typically, the Part B pot size is a good ratio guide for water addition

• 100/200 grams per metre is typical coverage amount.

Frequently Asked Questions About Maris Primer

Is it easy to mix? Yes, all the measurements are done for you. Part A and Part B are mixed, then add the Part B container full of water. Still thoroughly.

When is it ready for liquid to be applied? Once the primer becomes clear it is normally the sign that it is ready for coating to start.

What are the typical coverage rates? Typically, depending on substrate, you will get at least 30m2 out of a 3kg kit and 150m2 out of a 15kg kit. Some substrates like old felt give less coverage, some substrates like PVC, more.

Does it work on EPDM and TPO? It is such a good product that many projects with this substrate have had the product applied very successfully, but always undertake a peel test. There is a special EPDM and TPO primer available which should be the first choice on these substrates.

Does it work on solar reflective paint? Yes, but ensure any loose flakes are removed, and the surface is abraded.

What are the most common substrates it is used on? PVC, felt, asphalt, timber, metal, lead and concrete are the most typical. But it works on virtually any surface. Always undertake a peel test (48 hours ideally) it is essential and can save much time and money longer term.