What is your step by step bare metal prep? How do you treat metal if there is suspect of rust pinholes that could not be removed by DA grinding? Please answer as if blasting is not the preferred option. Will epoxy primer seal out any oxygen to prevent rust from forming from pinholes that have been missed? Thank you.
Thank you for your inquiry on the DTM Primer, along with the question on how to prepare a rusty pinhole steel surfaces. When removing and cleaning up rusty pinholes, the entire pinhole pit must be completely cleared of any rust Sometimes … er, most of the times, DA sanding will not get down far enough to fully remove and clean the pinhole. DA sanding will work fine on very shallow, surface type pinholes. Regarding deeper pinholes, we would recommend Sandblasting. Sandblasting is a great process to fully clean out rusty pinholes. However, be careful as to not over heat the metal, as it could cause warping of the metal. The primer will seal out oxygen causing further rust, again only if the pinholes are completely cleared.
Hi need some info I have the 5425 primer I have had it for a little over 3 years I've had the can open 4 or 5 times to mix some small amounts what is the shelf life of this primer, can is all most a full can and same question on the 5426 activator thanks Bob.
Hi, Bob. Pot life is 2-3 hours once activated. Shelf life on 5425 and 5426 Primers & Activators is 3 years (sealed & unopened). See the TDS for full details: 5staradvantage.com/wp-content/uploads/2023/09/5425-5426-TDS-2023.09.pdf
What is your step by step bare metal prep? How do you treat metal if there is suspect of rust pinholes that could not be removed by DA grinding? Please answer as if blasting is not the preferred option. Will epoxy primer seal out any oxygen to prevent rust from forming from pinholes that have been missed?
Thank you.
Thank you for your inquiry on the DTM Primer, along with the question on how to prepare a rusty pinhole steel surfaces.
When removing and cleaning up rusty pinholes, the entire pinhole pit must be completely cleared of any rust
Sometimes … er, most of the times, DA sanding will not get down far enough to fully remove and clean the pinhole. DA sanding will work fine on very shallow, surface type pinholes.
Regarding deeper pinholes, we would recommend Sandblasting. Sandblasting is a great process to fully clean out rusty pinholes. However, be careful as to not over heat the metal, as it could cause warping of the metal.
The primer will seal out oxygen causing further rust, again only if the pinholes are completely cleared.
Hi need some info I have the 5425 primer I have had it for a little over 3 years I've had the can open 4 or 5 times to mix some small amounts what is the shelf life of this primer, can is all most a full can and same question on the 5426 activator thanks Bob.
Hi, Bob. Pot life is 2-3 hours once activated. Shelf life on 5425 and 5426 Primers & Activators is 3 years (sealed & unopened). See the TDS for full details: 5staradvantage.com/wp-content/uploads/2023/09/5425-5426-TDS-2023.09.pdf