PenaShield is meant to be applied undiluted directly from the container.
Yes, you can apply PenaShield to pressure treated wood that is dry, and once the application has dried you can apply a water sealant. Allow PenaShield-treated wood to dry completely (at least 24 hours) before applying any protective finish. Protective finish must be applied within 2 weeks of treatment.
Both PenaShield and Bora-Care should be applied to untreated, clean, dry wood. Boracare does not need to be re-applied and lasts for the life of the wood in favorable conditions. PenaShield must be re-applied every 1 to 5 years to exterior unfinished bare wood surfaces but lasts for the life of the wood for indoor applications and on exterior wood that is painted/sealed.
Per the product label for PenaShield: Apply PenaShield only to bare wood or to wood surfaces where an intact water-repellent barrier is not present. PenaShield is a ready-to-use product. Either brush apply directly from the container or apply with a low pressure garden-type sprayer. Small wooden items may also be treated by dipping. Return unused product to original container and seal tightly. Always clean and/or flush equipment and lines with water after use. When applying more than one coat, wait at least 20 minutes between applications. No immersion or dip soaking necessary.
PenaShield should not damage concrete. Please be sure to review the product label for more information and complete application instructions.
PenaShield is a borate based, ready to use wood preserver only as directed on the product label. It cannot be applied to other surfaces nor is it safe on plants.
PenaShield should only be used on cut timbor not used for firewood or any wood used for cooking.