UltraCrete PY4 Polyester Resin System
£ 99.99
Ex. VAT
(£ 119.99 inc VAT)
Polyester Resins
We supply a range of Polyester Mortars which are fast‑setting resin‑based bedding solutions from Instarmac’s UltraCrete range designed for high‑performance reinstatement and installation work. PY4 is a stiff polyester resin mortar ideal for rapid installation and reinstatement of manhole covers, ...
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Instarmac
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Instarmac
UltraCrete PY5 Flowable Polyester Resin System
£ 99.99 Ex. VAT(£ 119.99 inc VAT)
Our FAQs help homeowners, landscapers, and contractors choose the right products, covering suitability, joint widths, setting times, colours, and installation for long-lasting, professional results.
Both mortars offer rapid set times, allowing areas to be trafficked in as little as 40 minutes, making them perfect for busy streetworks and commercial landscaping projects.
Yes. UltraCrete polyester mortars are versatile and durable, suitable for most weather conditions. However, surfaces should be clean and free of debris to ensure proper bonding.
PY4 is a stiff polyester resin for structural bedding and high-load applications. PY5 is a flowable version, ideal for filling voids, backfilling around bolts, and complex installations where a pourable material is required.
Yes. Both mortars are HAPAS and HA104 compliant, providing trusted performance for highways, streetworks, and public space installations.
Yes. While widely used by contractors, these rapid-set mortars are also suitable for DIY garden paving, decking posts, metal balustrades, and street furniture, offering a professional, durable finish.
Simply mix the resin system as per the manufacturer’s instructions, place it into the prepared bedding or void, and allow to set. PY5’s flowable nature makes it ideal for pouring into narrow or irregular spaces, while PY4 is applied for more rigid, structural bedding.