Frequently Asked Questions
Here is a list of questions and answers we think you may find helpful.
For technical advice, please telephone Tiranti’s at Thatcham, on 0845 123 2100, during normal working hours.
Gel Coat resin has an approximate coverage of 450gm², a 1kg tin should give you just under 2 square metres.
As a general rule you should go by the ratio of 2 to 1 by weight; for example when using light chopped stran mat (300gm²) you will need around 600 grams of resin to wet it through.
For a true colour - our range of Polyurethane Pigments can be used. You could also use the Acrylic Paints, but the colour produced will not be strong but more of a pastel shade. No product is suitable for colouring RTV-101.
Extra layers added to the mould should be applied when the first layer is still just slightly tacky.
If kept wrapped in damp cloths and sealed in a plastic bag, moulds will normally keep for 2 to 3 days. Ideally though, Alginate moulds should be used as soon as possible as they will begin to shrink and distort as the water dries.
You can try painting a solution of water and Sodium Bicarbonate (Baking Soda) onto the set Alginate before adding additional layers.
Our Earth Colours are ideal for this.
The 23¾ carat; the higher the gold content, the better.
Normally, it will make up to two face moulds.
No, not really; it will not last well at all. However, if you use Basic Alpha with our Plaster Polymer it will be very weather resistant and should last several years.