UltraCrete PY4 Polyester Resin System

Technical information

• Supplied as a two component system: it contains two equal parts of resin and two parts of activator/filler
• Highly recommended to always use one tin of resin to one pack of filler/activator
• When laying the material, a minimum thickness of 5mm and a maximum of 50mm should be adhered to
• Can achieve 60 N/mm2 compressive strength in just one hour
• Ideal for use as a bedding material for rapid construction in accordance with HA104/02 part 5, clause 6.1

Get in touch with our team if you would like a copy of the full technical datasheet for PY4, which includes more details on storage recommendations and how to prepare surfaces before application.

How to mix PY4 Polyester Resin Bedding Mortar

PY4 should be mixed thoroughly with a forced action mixer or vigorously by hand with an appropriate tool:

1. Add 1 tin of resin to 1 unit of filler/activator.
2. Pour all the resin from the tin into the outer bucket and slowly add the filler until a homogeneous mix is attained.
3. Mix only enough material to apply in 4 minutes. Do not part mix. Use immediately after mixing.

How to apply PY4 Polyester Resin Bedding Mortar

1. The bedding material should be placed on the supporting structure immediately and used within 4 minutes of mixing.
2. The frame should be lowered into position using suitable lifting equipment and placed on the bedding mortar, ensuring it is fully supported.
3. Check that the frame does not overhang the mortar at any point.
4. Care should be taken to prevent voids in the bedding material under the frame, particularly in the vicinity of the cover seating.
5. Once the bedding material has reached its initial set, the backfill material UltraCrete QC10 can be placed.