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Two-part, rapid curing epoxy repair mortar, used to fill voids or adjust surface levels prior to the installation of a resin surface finish.


Bond Strength BS EN 4264: B3.5.


  • Substrates should be dry, structurally sound and free from contamination, friable materials or laitance which may affect either the adhesion or penetration of the resin system.
  • All residues of old paint coatings and dust must be removed. Substrates to achieve 26 N/mm² compressive strength (BS EN 12504-2) and surface tensile strength 1.5 N/mm² (BS EN 13892-8:).
  • Substrates must include an effective damp proof membrane and contain residual moisture not greater than 5% by weight (75% R.H.) to BS 8203:2017 (see AltroProof for installations above 75% R.H.).

Related literature

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NBS Specification

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This product is associated with the following NBS Create clause:
45-55-50/310 Epoxy mortar

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

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+44 (0)1462 707604

Product reference

Altro Patch

Manufacturer details

Works Road,
Letchworth Garden City,
Hertfordshire, SG6 1NW
Tel +44 (0)1462 707604
Fax +44 (0)1462 707515
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