How to seal so that your surface isn't slippery when wet

If sealing makes surfaces slippery or not is dependent upon many factors including sealant product, amount of sealant, age of surface, and type of paver or stone.  From our experience, pavers and travertine alike have plenty of grip when our standard amount of SealN'lock is used as opposed to oil based.  Oil based sealers have a high solid content.  This prevents the sealer from being able to penetrate the paver which explains its slipperiness, brighter sheen, and tendency to wear away quicker, especially in highly weathered or trafficked areas. 
Older Pavers are more porous and abrasive as opposed to freshly installed.  Therefore they tend to require more sealant.  However, over applying any sealant can cause a surface to become more slippery when wet.  It is important to check for absorbancy before over flooding the pavers.  If it stays wet with sealant for more than ~30 minutes, depending on weather, then your probably over treating.  On the other hand, if the sealant you apply is almost instantly absorbed into the pavers then you may need to increase application or perhaps decrease water mixture depending on weather.  Look for the sealant to stay on the surface about 15 minutes before being dry to the touch.  This is a general guide for all sealants and surfaces.  Variation in choices may require more or less application.  We would, of course, recommend our method using SealN'Lock.  Look for future posts for more information and instruction on this method.  Or just shoot us an email with any questions, sealingspecialists@gmail.com