Meshcoat Render
HEIDELBERGER PT 320

PT 320 is a factory mixed adhesive render following European standard DIN 18550 and DIN 18555.
PT 320 Adhesive Render can be universally applied to outdoor areas and is designed for use as a meshcoat plaster on PT 300 or PT 325. PT 320 can be also used to straighten previous coats of plaster before the application of a finishing render.

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.
High or unevenly absorbing substrates should be sealed with Putz-Technik’s SK15 prior to the application of PT 320 to control the absorption of water from the plaster into the substrate.

Application
PT 320 is suitable for commercial plastering machines or manual application (drill mixed only).
PT 320 can be used as a meshcoat onto PT 300 or PT 325. Fibreglass mesh can be trowelled into this coat (2–4mm thickness is usually sufficient) ensuring that it is overlapped at least 100mm where it is joined. PT 320 can also be used as a straightening coat.
Putz-technik products ltd recommends the use Fibreglass Mesh breglass reinforcing mesh.
Ensure that breglass mesh is overlapped at least 100mm where it is joined.

Coverage
Depending on the substrate a 25kg bag of PT 320 yields approximately 6 square metres at 2.5mm 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 320/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 ltd for further information on drying times.

Technical
PT 320 is manufactured using selected aggregates, cement and mineral additives. Sand particle size range is 0—1.0mm.
PT 320 has a high water vapour permeability (breathing activity).
Where a re resistance rating is required please contact Putz-technik products ltd.
Compressive Strength N/mm²
following European Standard DIN 18555 > 3
Flexural Strength N/mm² > 2.5
Bond Strength N/mm² > 0.3
Water Demand
following European Standard DIN 52617 < 0.5
Water Retention (%) 99.8
Water Absorption Coefficient 0.25

Storage
PT 320 is packaged in 25kg paper bags, with 40 bags (1 tonne) per pallet.
PT 320 can be stored in a dry place for up to 6 months.

Quality Control
PT 320 is quality controlled at point of manufacture and tested by independent laboratories.

Service
At the forefront of plastering technology, Putz-technik products ltd offers its assistance and experience in the selection and use of our products and machines.

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