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You are working on the safety system of a car. The system literally depends on the bond strength you create. Unless you are a chemist and have studied the bonding properties of the material involved, follow the instructions, spend $5 and do the ****ed job right. Not only is there a liability risk, but you are literally putting peoples lives in danger. If you don't prime, it won't perform when it needs to.
HOLY HELL, PLEASE TELL ME THAT IS A JOKE?!?!?!?!?!?!
A. BY AND LARGE PRIMERLESS IS GARBAGE URETHANE, P2G+ AND DINOL 501HV ARE MY ONLY EXCEPTIONS
B. PRIMER IS THE ONLY THING THAT ALLOWS GOOD URETHANE TO CHEMICALLY BOND TO THE GLASS, THAT IS ALSO WHY GOOD URETHANE REQUIRES PRIMER IS SO THE URETHANE CAN BE STIFFER, DENSER, AND STRONGER THAN PRIMERLESS BECAUSE ITS NOT MIXED WITH PRIMER IN A TUBE...
I've always used the primerless but got a few free tubes of conventional since they are nearly expired. How important is it to use primer with the conventional? The primer I have is a different brand from the urethane and you're not supposed to mix them according to the lit. How much is that truth and how much is that the manufacturer wanting to sell more product?
Everybody's an expert, or thinks they are. If primerless urethane is so unfit, so unreliable, etc,. etc. then tell me this... why would manufacturers even produce the stuff? Most all urethane manufacturers do make it available. Come on guys, let's keep opinions and facts separated.
Everybody's an expert, or thinks they are. If primerless urethane is so unfit, so unreliable, etc,. etc. then tell me this... why would manufacturers even produce the stuff? Most all urethane manufacturers do make it available. Come on guys, let's keep opinions and facts separated.
Well, thats a multi-part question. The reason they make it is because there is a segment of our industry that wants to pay $3 for adhesive. Ask a urethane mfr rep (unofficially) which they would use in their kids car. As far as the performance, take a look at the "charts"...now I know that we-uns cant be forced to actually do some research, but if you look at the overall performance, there is a difference. Also, if the product was good, why on earth wouldn't they use it on the assembly line....god knows how much you could save by eliminating an entire step. I know they don't use any of the products we use, but they certainly do not use a primerless one.
The original question was whether you could mix primer / adhesive, or if you really even needed to prime with a product that required it. You don't need to be an expert to answer that. No and Yes.
Everybody\'s an expert, or thinks they are. If primerless urethane is so unfit, so unreliable, etc,. etc. then tell me this... why would manufacturers even produce the stuff? Most all urethane manufacturers do make it available. Come on guys, let\'s keep opinions and facts separated.
Well, thats a multi-part question. The reason they make it is because there is a segment of our industry that wants to pay $3 for adhesive. Ask a urethane mfr rep (unofficially) which they would use in their kids car. As far as the performance, take a look at the "charts"...now I know that we-uns cant be forced to actually do some research, but if you look at the overall performance, there is a difference. Also, if the product was good, why on earth wouldn't they use it on the assembly line....god knows how much you could save by eliminating an entire step. I know they don't use any of the products we use, but they certainly do not use a primerless one.
The original question was whether you could mix primer / adhesive, or if you really even needed to prime with a product that required it. You don't need to be an expert to answer that. No and Yes.
I dunno, Freddy and chemist not. Think about this - why would a urethane manufacturer put themselves at the legal and monetary risk you both say is so certain? Especially for $3/tube urethane? Besides, most of the primerless I've seen costs more than non-primerless per tube. I don't use primerless myself, but still your arguements seem baseless to me.
Read the original post. The question was whether it’s ok to use regular, not primerless, urethane, without primer or with a primer from a different manufacturer. The answer is no and no.