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Blackice kirjoitti:Kiitos mielipiteistä. Voisko joku vielä perustella miksi käytännössä Meguiars on vaarallista maalipinnalle.

Wikipedia, Polydimetyylisiloksaani. kirjoitti: Polymerisaation aikana vapautuu myrkyllistä vetykloridikaasua (suolahappoa).

There are actually “good” silicones and “bad” silicones. Silicone has some good and even necessary traits that enhance rubber , plastic and vinyl, at least when it’s the “good “kind. One of the the good kind is Polydimethylsiloxane or PDMS for short. This good silicone is water-based ( "water borne" ), dries to a non-oily hard surface, doesn’t migrate the plasticisers from the material , less absorption of UV rays and non dust attracting. Good attributes.

The “bad” silicone is Dimethyl silicone. D/S is oily, migratory ( pulls the plasticisers from the plastic/vinyl. Plasticisers are what give elasticity and color to these materials ), attracts dust , non water –borne ( contains petroleum distillates which give the “oily “ feel ), and can actually cause degradation of some rubber compounds in tires with sun interaction , removing “micro-wax” that all tire manufacturers put in their tires . And “tire browning” is associated with the D/S variety too, but that’s a story in itself which I’ll pass on for now. Sufffice it to say though, D/S is bad for tires in the long run.

Due to its volatile attributes when exposed to UV rays, this acts as a catalyst to the paintwork in that will cause oxidisation and at worst corrosion over the long term. Admittedly however, this process may take a number of years so immediately effects will be neglible and therefore may not be directly attributed to D/S products such as Meguiars.

One knock on effect from the reaction of D/S and the removal of Carbon from tyres is a process known as a 'Photo Spotting', this is where the D/S & Carbon are slung off the tyres onto the paintwork. A reaction will then occur between the D/S+Carbon & UV Rays (eg the sun), what will appear on your paintwork are brown spots that look very similar to 'tar' spot marks but can not be removed as the reaction is surface penetrating.

It has only been in recent times that it has been known that a lot of Meguiars products contain this type of silicone. If you ask a lot of manufacturers of car care products they will not directly state that D/S is contained in their products due to the extremely bad rep that this chemical has. However, when exporting chemical based compounds from the US there is a sheet known as Mata Data Safety Sheet (MDSS) that by american law must contain the exact specification and 'ingredients' of the exported product. Anway, since word has got out in the US; wholesalers are quietly dropping the brand from their product lines - why do you think Meguiars are heavily investing in marketing in Europe via their franchised operations? You can spend your money in two ways when you are a manufacturer - either in marketing or the product itself; guess which Meguiars spend it on?

juissi.2 kirjoitti:lähteekös nuo vahakerrokset IPAlla pois pyyhkimällä vai jotain järeämpää tavaraa.

This products is "murder" to rubber.

No supplier will tell you to use it on the interior because it is too slick and greasy.

So, use it on engines! But what about the rubber belts and hoses? It will breakdown an deteriorate the rubber. Also, solvents have a low flash point meaning that you could get a flash fire if the engine were hot.

Manufacturer says use it on tires!! A great tire shine. What are tires? Rubber! Plus, and this is a proven fact, when the solvent combines with the carbon black in tires it forms a liquid that when slung on the plastic body parts of a lighter color will irreparably stain the paint.

There is no place for solvent based dressings in the auto detail industry. Yet, the chemical companies still produce it. Why? For t the money, no integrity.