DRYZONE Fast Set Plaster Instruction Manual
- June 9, 2024
- DRYZONE
Table of Contents
DRYZONE Fast Set Plaster
Product Description
- Dryzone® Fast-Set Plaster is a breathable pre-blended plaster based on natural cement and special additives to control dampness and salt migration in walls. It has been specially developed to set faster than other types of renovation plasters. It is ideal for smaller areas or dubbing out uneven walls.
- The plaster is used as part of the Dryzone® System for replastering after Dryzone® Damp-Proofing Cream or Dryrod® Damp-Proofing Rods have been used to create a remedial damp-proof course.
- This highly effective renovation plaster has a porous structure which controls salt migration and allows walls to dry out by evaporation. Suitable for use on salt and damp contaminated walls, it provides enhanced salt protection combined with faster set time compared with competing products.
Benefits
- Controls dampness and salt migration
- Fast set – 2 hours [1]
- Breathable – allows wall to dry naturally
- Natural cement base
Properties
- Appearance Grey powder
- Size(s) & Packaging 20 kg bags
- Coverage 1 m2 per bag (at 20 mm thickness) [2]
- Thermal Conductivity 0.6 W/mK
- Reaction to Fire Class A1
- Breathability μ ≤ 15
- Bond strength 0.2 N/mm2
- Storage The products must be stored in a dry place
- Shelf Life 12 months in unopened packaging
- Compressive Strength CS IV
Application Information
Dryzone® Fast-Set Plaster should be applied in accordance with BS EN 13914-2:2005.
Preparation
Remove the existing plaster up to 30 cm above the highest visible line of
the rising damp or 1 m above the dpc line in accordance with BS 6576. Remove
all loose and brittle material which could prevent even adhesion to the
surface, ensuring the substrate is clean. In the case of high salt
concentration, scrape or brush the wall until the original masonry is visible.
- Dryzone® Fast-Set Plaster is compatible with most building materials but is not recommended for use over plasterboard or over walls that have a bituminous coating.
- Dryzone® Fast-Set Plaster can be used to fill in any large cavities in the wall to level the surface prior to full coat application.
For particularly high suction or dry backgrounds, first wet down the surface using clean water. Do not use other additives such as PVA.
Mixing
Dryzone® Fast-Set Plaster should be mixed with a drill mixer. Pour 4 litres of
water into a container, then slowly add the plaster. Do not add more than a
further half a litre of water. Start mixing the product at low speed to
minimise dust generation. As the paste begins to form, the mixing speed can be
increased until the product is completely mixed. The mix will begin with a low
viscosity which can be left to rest for a few minutes. The viscosity will then
build quickly over 5 to 10 minutes to give a thicker mix which is then stable
and can be easily applied. Ensure that the full 4 litres of water is added.
Application
Dryzone® Fast-Set Plaster is particularly useful when a fast set is required, for example in small areas, dubbing out of uneven walls and in low temperatures down to 5 °C.
-
Rough Coat
Apply a rough coat of approximately 5 – 10 mm thickness, depending on the final thickness required. This will act as an anchoring layer. -
Plaster Coat
When the rough coat becomes firm, typically after 1 – 2 hours apply the next layer of Dryzone® Fast-Set Plaster with a thickness at least 10 – 15 mm [3].
Apply the layer of plaster, levelling it with a simple straight edge or
adjusters to maintain the thickness without using excessive pressure on the
product. Lightly scratch the surface to provide a key for the next coat.
Dryzone® Fast-Set Plaster is designed to set quickly which shortens the
working time to 15 – 30 minutes depending on temperature and humidity.
Therefore, it is recommended to only mix small amounts at a time in warm
conditions. If the product starts to stiffen, do not attempt to rework or
remix.
If a thickness greater than 20 mm is required, this can be built up using
subsequent layers of no more than 10 mm, ensuring that the previous coat of
plaster is firm and dry before continuing.
Leave to fully set for a minimum of 4 hours before applying a standard gypsum
skim coat to a thickness of approximately 2 mm. In particularly cold or damp
conditions, or for plaster thicker than 20 mm, the drying time of Dryzone®
Fast-Set Plaster will be extended and application of the skim coat should be
delayed. Rapid drying out of the plaster should be avoided.
Dryzone® Fast-Set Plaster is designed to set within 2 hours at 20 °C. In
colder temperatures the set will be slower but can be accelerated by using
warm water. In hot temperatures the set will be faster and can be slowed using
cold water.
Any other finishing is carried out once the curing process is complete, after
at least 14 days. Redecorate using a non-vinyl based emulsion paint.
To protect against mould growth that may be caused by condensation Dryzone®
Mould-Resistant Emulsion Paint is recommended.
Other Information
For health and safety information see the Safety Datasheet (available upon
request).
Dryzone® Fast-Set Plaster is produced in accordance with ISO 9001 quality
management system.
Information given is in good faith based on experience and usage, however all recommendations are made without warranty or guarantee, since the conditions of use are beyond our control. All goods are sold in accordance with our Conditions of Sale, copies of which are available on request. Customers are advised that products, techniques and codes of practice are under constant review and changes occur without notice; please ensure you have the latest updated information.
© 2022 Safeguard Europe Ltd.,
Redkiln Close,
Horsham,
West Sussex,
RH13 5QL.
T: +44 (0) 1403 210204
F: +44 (0) 1403 217529
E: info@safeguardeurope.com
www.safeguardeurope.com
References
Read User Manual Online (PDF format)
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