Adhesive Render (for fibre-cement sheeting)
HEIDELBERGER PT 325
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Compressive Strength N/mm²> 2.5 following European Standard DIN 18555 Flexural Strength N/mm² > 2.5 Bond Strength N/mm² 0.5 Water Demand < 0.5 following European Standard DIN 52617 Water Retention (%) 99.6 Water Absorption Coefficient < 0.25 |
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PT 325 is a factory mixed adhesive render following European standard DIN 18550 and DIN 18555.
PT 325 Adhesive Render can be universally applied to outdoor areas and is designed specifically for use as a key or bonding plaster on fibre-cement sheeting (Eterpan, Hardibacker etc).
Preparation
The substrate must be of a sound nature, free from dust and loose particles, form release oils and other contaminants which could affect adhesion and bonding strengths of subsequent coatings.
Application
PT 325 can be used as a basecoat to a minimum of 10mm thickness, thereby providing a bonding surface for further coats of plaster. PT 325 is suitable for commercial plastering machines or manual application (drill mixed only).
Putz-technik products ltd recommends that one minimum 10mm coat of PT 325 be applied followed by a 2–4mm mesh coat of PT 320 (enough to straighten and cover mesh). The breglass mesh should be trowelled into this second coat. The second coat may be applied the day following the application of the first coat. The use of fibreglass mesh embedded wet-in-wet a separate meshcoat (see PT 320) over the entire area of PT 325 is essential.
When trowelling mesh into PT 320 ensure that it is overlapped at least 100mm where it is joined. Putz-technik products recommends the use of Fibreglass Mesh reinforcing mesh.
Coverage
Depending on the substrate a 25kg bag of PT 325 yields approximately 1.5 square metres at 10mm thickness.
Important
Do not under any circumstances add foreign substances other than clean water to premixed mineral plasters.
Do not add further water to PT 325/water mixture later than two hours after original mixing time.
Allow 1 day/mm drying time prior to applying further coats of plaster. If necessary, contact Putz-technik products for further information on drying times.
Technical
PT 325 is manufactured using selected aggregates, cement and mineral additives. Sand particle size range is 0—1.0mm.
PT 325 has a high water vapour permeability (breathing activity).
Where a re resistance rating is required please contact Putz-technik products.
Storage
PT 325 is packaged in 25kg paper bags, with 40 bags (1 tonne) per pallet.
PT 325 can be stored in a dry place for up to 6 months.
Quality Control
PT 325 is quality controlled at point of manufacture and tested by independent laboratories.
Service
At the forefront of plastering technology, Putz-technik products offers its assistance and experience in the selection and use of our products and machines.
