Avoiding Acid Burn
Question:
What causes the permanent droplet and pour marks when acid stain first hits a concrete surface, and how do I avoid them?
Answer:
This is known as acid burn. Some concrete surfaces react instantaneously when acid stain is applied. These instant reactions leave a permanent color differentiation and outline in the form of a droplet (from a sprayer) or pour mark (from a jug or container). These color differentiations and marks are hard to remove, and most of the time even additional stain applications applied soon after will not remove the marks.
A common method to avoid this problem is wetting the surface prior to stain application. The damp surface will slightly dilute the initial reaction and eliminate surface acid burn. Remember to be consistent! Stain applied to dampened areas will react differently than when applied to dry areas. Another method I have seen used by skilled applicators is to dampen a small area, pour or spray stain in that damp area to avoid acid burn, and then use a brush or automatic scrubber to move the stain around, being careful to maintain a wet edge.
No matter what method is employed to control acid burn, produce jobsite samples to see how the concrete reacts and what the final color will be. More information about acid burn and how to avoid it can be found in Gaye Goodman’s book Advanced Tips and Tricks for Acid Staining.
What causes the permanent droplet and pour marks when acid stain first hits a concrete surface, and how do I avoid them?
Answer:
This is known as acid burn. Some concrete surfaces react instantaneously when acid stain is applied. These instant reactions leave a permanent color differentiation and outline in the form of a droplet (from a sprayer) or pour mark (from a jug or container). These color differentiations and marks are hard to remove, and most of the time even additional stain applications applied soon after will not remove the marks.
A common method to avoid this problem is wetting the surface prior to stain application. The damp surface will slightly dilute the initial reaction and eliminate surface acid burn. Remember to be consistent! Stain applied to dampened areas will react differently than when applied to dry areas. Another method I have seen used by skilled applicators is to dampen a small area, pour or spray stain in that damp area to avoid acid burn, and then use a brush or automatic scrubber to move the stain around, being careful to maintain a wet edge.
No matter what method is employed to control acid burn, produce jobsite samples to see how the concrete reacts and what the final color will be. More information about acid burn and how to avoid it can be found in Gaye Goodman’s book Advanced Tips and Tricks for Acid Staining.
1 Comments:
i have seen this your advs is helpful thank you.
By Anonymous, at 8:56 PM
Post a Comment
Links to this post:
Create a Link
Home Page