Use on most any exterior wood surface (see Where Not to Use for exceptions). Will not damage or discolor most building materials. Always test in an inconspicuous area first.
How much CPR do I need?
- At cleaner strength (8:1), 1 container mixed will clean 750-1,000 square feet, depending on wood porosity
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CPR is great on almost all wood species except Redwood, some Cedar, and Douglas Fir. It will turn those woods a funky color. We always recommend doing a test with CPR before applying to the entire home to ensure there won’t be discoloration issues.
A pump sprayer works great for CPR. Apply from the bottom up, then rinse from the top down. A stiff bristle brush may be necessary for more stubborn patches.
No. This is normal for CPR and other types of powder products. As long as 90% of it dissolves, you’re still getting the right effects from the product. Warm water will help dissolve the powder better, so if you have warm water available, use it, but it’s not necessary for CPR to work properly.
The key is to make sure the wood is back to neutral after using CPR. Use pH strips, widely available on the internet or at pool/hot tub supply stores. Make sure you’re at neutral after rinsing to make sure you got it all off.