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Adhering Glass Mosaics to Fibreglass Swimming Pools
Description

This direct-bond system installs glass mosaics onto rigid fibreglass pool shells using a two-part epoxy adhesive and epoxy grout, following defined scuff-and-clean preparation, full back-buttering, rubber-float consolidation, and curing to immersion.

The method applies a thin epoxy contact coat to the keyed gelcoat, provides full epoxy coverage to the mosaic backs, and uses firm padding to achieve a continuous bed suitable for permanent immersion service. Components are selected to ISO 13007 and EN 12004 R2T epoxy classifications to ensure high bond strength on non-porous gelcoat and chemical resistance for pools and hygiene environments.

Key Features
  • Direct installation onto fibreglass gelcoat with R2T epoxy adhesive and RG epoxy grout for immersed service and hygiene.
  • Defined preparation includes uniform light scuff of gelcoat, complete clean and dry, followed by controlled epoxy application to the shell and full back-buttering of the mosaics.
  • Mixing follows A into B with slow-speed blending and awareness of exotherm to preserve pot life and achieve a creamy, trowelable paste.
  • Cure to immersion is per the product technical data after adhesive and grout have fully cured.
  • Techno Epostuk Epoxy adhesive & Techno Skycolor Evolution Expoxy grout, which can also be used as an adhesive.
NZ-Owned Business
NZ-Owned Business
Scope of Use
  • Glass mosaics applied to rigid, fully supported fibreglass pool shells in residential and commercial pools, spas and hydrotherapy facilities.
  • Where a waterproofing layer is part of adjacent wet-area design, membranes and bandaging are installed by trained applicators to IWAM and AS 3740, then flood tested before tiling those wet-area works.
Limitations on Use
  • Not suitable for flexible liners, poorly supported shells or substrates with movement beyond tile-industry limits.
  • Do not tile over contaminated, glossy or unkeyed gelcoat, rectify by uniform scuff, clean and dry before epoxy contact coat.
  • Observe temperature, humidity and protection windows in the TDS and keep fresh epoxy away from water until cured.
  • Pools, chemical exposure and immersion are risk triggers that require Surtec Technical review prior to specification and installation.
Statement of Building Code Compliance
  • When designed and installed as described, the lining system can contribute to compliance with NZBC B2 Durability for its intended service life and NZBC F2 Hazardous Building Materials as the components are inert in normal use.
  • Pools are outside the scope of NZBC E3 Internal Moisture and the E2 External Moisture building envelope provisions, which should not be selected for this lining.
  • Where adjacent internal wet-area works are part of the same project, those separate areas can be addressed under IWAM and AS 3740 with a compliant membrane system on their own EBOSS entry.
In-Service History

Technokolla epoxy adhesives and epoxy grouts are used internationally and in New Zealand for immersed and chemically cleaned environments, including pool projects supplied locally by Surtec.

Other Performance Attributes
  • R2T epoxy adhesive classification provides high bond to non-porous gelcoat, low absorption and excellent chemical resistance under continuous immersion.
  • Epoxy grout provides low porosity and resistance to staining and aggressive cleaning, supporting hygiene outcomes.
  • System QA and training resources are available, including application detail and product data.
Documents
Technical/Design Manual

251001

Technokolla’s tiling and waterproofing systems offer BRANZ-appraised performance for NZ residential & commercial projects, complying with NZBC, and IWAM best practice; backed by a 15 year warranty.

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