TOMPS Value BUDGET Economy RTV Silicone Rubber. The Original Hardness! We now offer this in 4 grades, the one you may have previously bought is the "Soft" 20 Shore A Version. However if you would like something harder, or indeed softer, check out the other 3 items in this category.
Another of the cheapest silicone kits in the UK without big sacrifice on quality. Our new offering to the market, ideally suited to short runs and quick prototypes where dimensions are not the most important. Shrinks no more than 0.4%, so in small scales this is nearly zero. A 20-21 Shore A hardness RTV Silicone Rubber with a good catalysed viscosity for easier air release.
This RTV has an open potlife of around 40 minutes for the slow set and 7-10 for the fast set (depending on temperature and humidity!). More technical data is to follow - we are currently writing the MSDS and TDS sheets!
Catalyst addition is 3% or 30g per kilo. With the fast catalyst, addition can be reduced to 2% or 20g a kilo to extend pot life. Do NOT reduce catalyst addition on the slow catalyst.
This is the second generation system offered by TOMPS with a modified catalyst. Not only has this improved shrinkage, it has also dealt with any oil bleed issues that very few customers have reported over the last year. However, we were not happy with 1 in 100 issues and have endeavoured to make it a 0 in 100 issues!
Catalyst is now a low toxicity system and is now GHS labelled.
Datasheets and Safety:
Technical Data Sheet Material Safety Data Sheet (MSDS / CoSHH) Material Safety Data Sheet (MSDS / CoSHH)- RED CATALYST (FAST) Material Safety Data Sheet (MSDS / CoSHH)- BLUE CATALYST (SLOW) Please note that we no longer print and include datasheets with your order. All datasheets are available for download on the item where your purchase was made. It is the responsibility of the purchaser to download and read the information. Please think of the environment before deciding to print!
Assess volume to fill in cubic centimetres Shake catalyst well. Allow to stand to degass To convert to a weight, multiply weight by the SG. (TOMPS Value =1.2). Weigh out Part A (white part) into a suitable container with room for mixing or degassing To calculate catalyst, divide the weight in grams by 100 and multiply by 3 to get 3%. 30g of Catalyst per each kilo is the right ratio. Add the catalyst to the mixing pot and start your timer for potlife. Stir Well! At least ONE minute, be mindful of potlife! Stand for one minute, again be mindful of potlife! Pour Demould at 8-12 hrs (or sooner if using a fast catalyst - please refer to the Technical Data Sheet) Please allow 48 hours to reach 99% cure before use, but mould may be used once demoulded, however its serviceable life will be shorter. If you mix a little short don't panic, mix a little more and pour it in to finish. Even if set, the RTV will stick to itself extremely well.