Description
Gyprock Masonry Adhesive is a dry powder adhesive made for fixing plasterboard directly to masonry and concrete walls, supplied here in a 20kg bag for full-room and trade-sized jobs. You mix it with water on site to a firm, creamy paste. It is also used to fix plaster cornice and decorative plaster castings to plasterboard walls and ceilings in residential and commercial buildings.
About the formula
This is a plaster-based, setting-type compound rather than a drying type. Once mixed, it has a working life of about 40 to 45 minutes before it starts to set. The manufacturer designs it for strong adhesion and good initial grab, and it is easy to spread by hand with a small broadknife. It is made in Australia by CSR Gyprock. The manufacturer lists a very low VOC content of 2g/L (as specified by GBCA) and notes the product is GECA accredited.
Where to use it
Indoors: direct-fixing plasterboard sheets to brick, block and concrete internal walls, and fixing plaster cornice and plaster castings to plasterboard walls and ceilings.
Outdoors: not intended for external use. It is an internal wall lining adhesive.
Suitable surfaces include brick, concrete and other masonry, plus plasterboard for cornice and casting work. Remove any paint from the areas where the adhesive will be applied.
How to use it
Pour the powder slowly into clean domestic water and mix to a firm, creamy consistency. The manufacturer's guide is roughly 3kg of powder to 1.5 litres of water. Mix only what you can use within the working life, and never mix or re-work adhesive once it has begun to set or dry. For plasterboard, apply daubs of about 50mm diameter that stand out at least 15mm from the wall. Keep daubs no more than 450mm apart horizontally and vertically, and keep them about 50mm in from sheet ends and edges. You can apply daubs to either the wall or the back of the sheet. Position the board and hold it in place until the adhesive sets. Use levelling pads where wall irregularities exceed 15mm. Always follow the current Gyprock installation guides for full fixing details.
Important notes
Not suitable for use on wet area plasterboard in tiled areas. Use only clean domestic water for mixing. Keep fresh batches free from contamination and do not mix with set or drying material. The bag is non re-sealable, so plan the quantity you need. Shelf life is 12 months from the date of manufacture when the bags are stored dry, out of the weather and away from direct sunlight. Wall suitability, fixing limits and any decoration requirements should be checked against the Gyprock Red Book and technical data sheet for your job.
Specifications
| Brand |
Gyprock (CSR) |
| Product |
Masonry Adhesive |
| Pack |
1 x 20kg non re-sealable bag |
| Form |
Dry powder (mix with water) |
| Colour |
Off white |
| Base |
Plaster-based setting compound |
| Application |
By hand with a broadknife, applied as daubs |
| Working life once mixed |
40 to 45 minutes |
| Coverage |
20kg fixes approximately 30m2 of plasterboard |
| Specific gravity |
2.3 to 2.4 |
| VOC content (GBCA) |
2g/L |
| Shelf life |
12 months from manufacture |
| Origin |
Made in Australia |
| Use |
Interior |
Safety
Avoid eye contact and repeated or prolonged skin contact, and avoid breathing in the powder dust when opening, pouring and mixing. Wear gloves and eye protection, and use a dust mask or respirator in dusty conditions, especially when sanding or cutting set material. Wash well after handling. Store bags in a dry place, protected from weather and direct sunlight. Refer to the Safety Data Sheet (SDS) for full details.
