ProChalk Permanent chalk for weatherproof and waterproof lines that aren’t going to go away any time soon. Most users are choosing this level of intensity for applications that are going to be covered. This level is engineered for more extreme conditions. Exterior applications include exterior layout, extreme conditions, concrete layout, long-term applications.
Performance Ranking: 4
Products specifications
| Chalk Type | Permanent |
| Color | Blue |
| Country of Origin | Varies (subject to change) |
| Marking Tool Type | Marking Chalk |
| Net Weight | 5 lb |
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