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Jesmonite AC730 Glass Reinforced composite - Bath Stone From £28.04
Jesmonite AC730 is a rapid setting acrylic modified cementitious composite. The system is designed for glass reinforced decorative structures, and can also be used for small castings. It is shrinkage compensated material of low permeability and is durable in all conditions of external weathering including water features.
The compound has a reduced free-lime content, and is of low alkalinity, leading to major reductions in efflorescence in comparison with ordinary Portland cement systems. The material contains a fine decorative aggregate and powder pigments, carefully controlled to give a consistent decorative surface finish after treatment with a proprietary brick cleaner or acid etch.
AC730 is available in six stone finishes; Natural, Bathstone, Yellow Sandstone, White Marble, Portland, and Silver Grey Granite.
It is essential to use both accurate scales and a Jesmonite High-shear Mixing Blade to ensure that the compound performs within its specification. Failure to follow these instructions can lead to strength loss, shrinkage, and reduced durability. Workshop conditions should be warm, dry, and out of direct sunlight. Environments where solvent-based compounds are in regular use should be avoided. Mixing containers should be clean and dry, and of a suitable size.
For standard glass reinforced laminates, weigh the liquids and base in separate clean containers at the following ratio:
AC730 Liquids 1 part by weight
NB. When making a chopped strand premix as described in the ‘casting’ section below, it is possible to work at a ratio of 4.5:1. This ratio should only be used when adding 13mm coarse glass chopped strands. This method results in a high strength pouring mix that is an alternative to a glass reinforced laminate.
If using the mix to brush or spray apply a ‘Gel Coat’ or ‘Mist Coat’ to the mould prior to laminating or use of a premix, the mix should thickened by working at a mixing ratio of 5.25:1. This will help reduce run off or drape on vertical mould surfaces.
In general, the mixture can be adjusted to suit the application or the needs of the end user. Adding a little liquid or base to make fine adjustments is very useful