HOW IT WORKS
PORESHIELD: A REVOLUTIONARY CONCRETE DURABILITY ENHANCER
There’s never been a concrete protection product that works quite like PoreShield. The unique science behind PoreShield allows it to provide protection well beyond conventional products.
HOW PORESHIELD WORKS… WHERE EXISTING PRODUCTS DON’T
When concrete is mixed, cement and water combine to create a porous material with less volume than the individual components. Those pores allow concrete to act as a sponge, absorbing fluids from the surface. But they also provide a pathway for common sources of damage.
Common concrete sealants attempt to protect concrete by creating a protective film on the surface. This works for a while – typically two to three years* – but as soon as the seal is damaged, fluid damage begins again – and since the remaining seal can hinder evaporation, the damage could even be worse than before.
PoreShield is different – in fact, it’s not a sealant at all. Instead of coating the surface, PoreShield fills concrete pores with a viscous, hydrophobic material, leaving no film on the surface. PoreShield has a lower surface tension than water, combined with a higher viscosity – allowing it to make its way into pores ahead of water.1
Protection from freeze/thaw damage
In cold weather climates, the water that has seeped into concrete pores will freeze and expand – damaging concrete from within. This can lead to cracking, separation, bulging, and more.
A recent study put PoreShield to the test as a solution to freeze/thaw damage, in both ideal and damaged concrete.2 In ideal conditions, conventional sealers and PoreShield offered similar protection. But in real-world conditions, PoreShield dramatically outperformed the competition.
This study indicated that in undamaged, ideal conditions, PoreShield limited water absorption similarly to both water-based and solvent-based silane film sealants. When first applied, the treatments were able to limit enough fluid absorption to protect concrete from freezing, expanding, or water damage.
But in freezing conditions, PoreShield has a clear advantage. As winter was simulated by a series of repeating freeze/thaw cycles, the film sealants were damaged, allowing water into the concrete and limiting evaporation. As the cycles continued, new damage occurred – confirmed by measuring the reduction in elastic modulus throughout temperature cycling. Meanwhile, PoreShield continued protecting concrete against these simulated conditions.
Protection from deicing & salt damage
It’s necessary to use deicing salt in cold climates to make roadways safer. But that deicing salt can quickly and easily cause permanent damage to concrete. Unless action is taken, the damage will only get worse over time.
Deicing salt dissolves snow and ice on the surface and makes its way into concrete pores along with the water. When the water dries, the salt remains behind and crystallizes. Over time, the salt builds up – and the resulting pressure can cause significant damage well after winter is over. This can occur even when salt is not directly applied, as foot and vehicle traffic can easily spread salt, resulting in damage.
Recent studies3,4,5 have concluded that damage from deicing salt goes even beyond the salt buildup described above.
Calcium Chloride (CaCl2) and Magnesium Chloride (MgCl2) are two of the most common deicers because they melt ice at lower temperatures than alternatives. However, they also cause a chemical reaction in concrete that creates an expansive product, calcium oxychloride, even at higher temperatures. That means that once the deicers seep into concrete pores, damage isn’t just occurring during winter – it continues all year long.
PoreShield limits the transmission of chloride ions, keeping CaCl2 on the surface and minimizing the damage within the pores themselves.
A recent study by WisDOT concluded that PoreShield reduces chloride ion diffusion by twice as much as other leading products. Since calcium oxychloride damage increases over time, it’s expected that PoreShield will increasingly outperform other products as time goes by.
1. Can Soy Methyl Esters Reduce Fluid Transport and Improve Durability of Concrete? (Coates et al., 2009)
2. Can Soy Methyl Esters Improve Concrete Pavement Joint Durability? (Golias et al., 2012)
3. Calcium oxychloride: A critical review of the literature surrounding the formation, deterioration… (Jones et al 2020)
4. Performance of Concrete Pavements in the Presence of Deicing Salts… (Suraneni et al 2016)
5. Calcium oxychloride formation potential in cementitious pastes exposed to blends of deicing salt (Suraneni, Monical, Unal, Farnam,