MARIS Mariflex PU 40 PU sealant & adhesive grey 310ml cartridge

MARIS Mariflex PU 40 310 ml – high-modulus polyurethane sealant and adhesive

Mariflex PU 40 is a single-component, thixotropic, and permanently elastic polyurethane sealant with a high modulus of elasticity. It is applied cold, cures with atmospheric humidity, and is suitable for sealing control joints, filling cracks, and bonding construction materials – such as insulation boards to waterproofing systems.

Scope of delivery: 310 ml cartridge, individually or in a box of 25 cartridges. Color: gray. Also available as a 600 ml sausage pack.

Advantages of Mariflex PU 40

• Sealant and adhesive in one
• Weather-resistant and resistant to continuous movement
• Water, heat, and frost resistant (−30 °C to +90 °C)
• Good adhesion to most building materials
• Resistant to detergents, oils, fuels, and seawater
• EN 15651-1 (facade) and EN 15651-4 (walkable joints)

Typical areas of application

• Control and expansion joints indoors and outdoors
• Filling cracks
• Bonding building materials, e.g., insulation boards to MARIS Mariseal 650

Technical data

• Base: Polyurethane prepolymer, single-component, moisture-curing
• Elongation at break: 450 %
• Tensile strength: 1.5 N/mm²
• E-modulus: 1 N/mm²
• Hardness: 45–55 Shore A
• Skin formation: approx. 15 minutes (23 °C, 50 % RH)
• Curing: approx. 3 mm in 24 hours
• Recommended joint width: 10–30 mm, width : depth approx. 2 : 1
• Processing temperature: +5 °C to +35 °C
• Shelf life: 12 months from production

Consumption

Consumption depends on the volume of the joint or crack. Calculation example: One 310 ml cartridge is sufficient for approx. 6 linear meters for a 10 × 5 mm joint.

Processing of Mariflex PU 40

1. Prepare the joint

The edges must be clean, dry, and stable; concrete must be at least 28 days old and have max. 5% moisture. Test for compatibility in an inconspicuous area beforehand.

2. Priming (if necessary)

Only if the adhesion test is insufficient: prime absorbent edges with Mariseal 710, and non-absorbent edges with Aquaprimer.

3. Backfilling

Insert a closed-cell PE backing rod so that the sealant only adheres to the edges and no bubbles are formed.

4. Application

Apply bubble-free using a cartridge gun; apply wide joints in three passes (both edges, then center).

5. Smoothing

Press and smooth with soapy water and a jointing trowel; remove masking tape immediately. Can be painted over with acrylic or dispersion paint after complete curing (test first).

Note: Contains isocyanates – for professional use only. All information is taken from the technical data sheet of the manufacturer Maris Polymers (Version 22).